first pass on obfs4-hop pt integration

24 files changed, 1286 insertions, 205 deletions

diff --git a/app/src/main/java/de/blinkt/openvpn/VpnProfile.java b/app/src/main/java/de/blinkt/openvpn/VpnProfile.java
index 3428e0c4..9baac195 100644
--- a/app/src/main/java/de/blinkt/openvpn/VpnProfile.java
+++ b/app/src/main/java/de/blinkt/openvpn/VpnProfile.java
@@ -5,8 +5,6 @@
 
 package de.blinkt.openvpn;
 
-import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
-import static de.blinkt.openvpn.core.connection.Connection.TransportType.OPENVPN;
 import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_PROFILE;
 import static se.leap.bitmaskclient.base.utils.ConfigHelper.stringEqual;
 
@@ -191,7 +189,7 @@ public class VpnProfile implements Serializable, Cloneable {
     private int mProfileVersion;
     public boolean mBlockUnusedAddressFamilies = true;
     public String mGatewayIp;
-    private final boolean mUseObfs4;
+    private final int mTransportType;
 
     public VpnProfile(String name, Connection.TransportType transportType) {
         mUuid = UUID.randomUUID();
@@ -200,7 +198,7 @@ public class VpnProfile implements Serializable, Cloneable {
 
         mConnections = new Connection[1];
         mLastUsed = System.currentTimeMillis();
-        mUseObfs4 = transportType == OBFS4;
+        mTransportType = transportType.toInt();
     }
 
     public static String openVpnEscape(String unescaped) {
@@ -266,7 +264,7 @@ public class VpnProfile implements Serializable, Cloneable {
         if (obj instanceof VpnProfile) {
             VpnProfile vp = (VpnProfile) obj;
             return stringEqual(vp.mGatewayIp, mGatewayIp) &&
-                    vp.mUseObfs4 == mUseObfs4;
+                    vp.mTransportType == mTransportType;
         }
         return false;
     }
@@ -297,15 +295,12 @@ public class VpnProfile implements Serializable, Cloneable {
     }
 
     public boolean usePluggableTransports() {
-        return mUseObfs4;
+        Connection.TransportType type = Connection.TransportType.fromInt(mTransportType);
+        return type != null && type.isPluggableTransport();
     }
 
     public Connection.TransportType getTransportType() {
-        if (mUseObfs4) {
-            return OBFS4;
-        } else {
-            return OPENVPN;
-        }
+        return Connection.TransportType.fromInt(mTransportType);
     }
 
     public String getName() {
diff --git a/app/src/main/java/de/blinkt/openvpn/core/ConfigParser.java b/app/src/main/java/de/blinkt/openvpn/core/ConfigParser.java
index 6063ea53..e8d333e3 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/ConfigParser.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/ConfigParser.java
@@ -27,6 +27,7 @@ import java.util.Vector;
 import de.blinkt.openvpn.VpnProfile;
 import de.blinkt.openvpn.core.connection.Connection;
 import de.blinkt.openvpn.core.connection.Obfs4Connection;
+import de.blinkt.openvpn.core.connection.Obfs4HopConnection;
 import de.blinkt.openvpn.core.connection.OpenvpnConnection;
 import se.leap.bitmaskclient.pluggableTransports.Obfs4Options;
 
@@ -807,8 +808,23 @@ public class ConfigParser {
                 e.printStackTrace();
                 return null;
             }
-        else
-            conn = transportType.getMetaType() == PT ? new Obfs4Connection(obfs4Options) : new OpenvpnConnection();
+        else {
+            switch (transportType) {
+                case OBFS4:
+                    conn = new Obfs4Connection(obfs4Options);
+                    break;
+                case OBFS4_HOP:
+                    conn = new Obfs4HopConnection(obfs4Options);
+                    break;
+                case OPENVPN:
+                    conn = new OpenvpnConnection();
+                    break;
+                default:
+                    throw new ConfigParseError("Unexpected transport type: " + transportType);
+
+            }
+
+        }
 
         Vector<String> port = getOption("port", 1, 1);
         if (port != null) {
diff --git a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
index 0ae7639e..6adffda1 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java
@@ -12,7 +12,6 @@ import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_PROFILE;
 import static se.leap.bitmaskclient.base.utils.ConfigHelper.ObfsVpnHelper.useObfsVpn;
 
 import android.Manifest.permission;
-import android.annotation.TargetApi;
 import android.app.Notification;
 import android.content.Intent;
 import android.content.IntentFilter;
@@ -41,7 +40,6 @@ import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.Collection;
-import java.util.Locale;
 import java.util.Vector;
 
 import de.blinkt.openvpn.VpnProfile;
@@ -53,7 +51,8 @@ import se.leap.bitmaskclient.R;
 import se.leap.bitmaskclient.eip.EipStatus;
 import se.leap.bitmaskclient.eip.VpnNotificationManager;
 import se.leap.bitmaskclient.firewall.FirewallManager;
-import se.leap.bitmaskclient.pluggableTransports.ObfsVpnClient;
+import se.leap.bitmaskclient.pluggableTransports.PtClientBuilder;
+import se.leap.bitmaskclient.pluggableTransports.PtClientInterface;
 import se.leap.bitmaskclient.pluggableTransports.ShapeshifterClient;
 
 
@@ -91,7 +90,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
     private Runnable mOpenVPNThread;
     private VpnNotificationManager notificationManager;
     private ShapeshifterClient shapeshifter;
-    private ObfsVpnClient obfsVpnClient;
+    private PtClientInterface obfsVpnClient;
     private FirewallManager firewallManager;
 
     private final IBinder mBinder = new IOpenVPNServiceInternal.Stub() {
@@ -415,18 +414,19 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac
         stopOldOpenVPNProcess();
         // An old running VPN should now be exited
         mStarting = false;
-
-        if (mProfile.usePluggableTransports() && connection instanceof Obfs4Connection) {
-            Obfs4Connection obfs4Connection = (Obfs4Connection) connection;
+        Connection.TransportType transportType = connection.getTransportType();
+        if (mProfile.usePluggableTransports() && transportType.isPluggableTransport()) {
             if (useObfsVpn()) {
                 if (obfsVpnClient != null && obfsVpnClient.isStarted()) {
                     obfsVpnClient.stop();
                 }
-                obfsVpnClient = new ObfsVpnClient(obfs4Connection.getDispatcherOptions());
+                obfsVpnClient = PtClientBuilder.getPtClient(connection);
                 int runningSocksPort = obfsVpnClient.start();
-                connection.setProxyPort(String.valueOf(runningSocksPort));
+                if (connection.getTransportType() == Connection.TransportType.OBFS4) {
+                    connection.setProxyPort(String.valueOf(runningSocksPort));
+                }
             } else if (shapeshifter == null) {
-                shapeshifter = new ShapeshifterClient(obfs4Connection.getDispatcherOptions());
+                shapeshifter = new ShapeshifterClient(((Obfs4Connection) connection).getObfs4Options());
                 shapeshifter.start();
             }
         }
diff --git a/app/src/main/java/de/blinkt/openvpn/core/connection/Connection.java b/app/src/main/java/de/blinkt/openvpn/core/connection/Connection.java
index 137b3f16..6dc78a30 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/connection/Connection.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/connection/Connection.java
@@ -5,6 +5,8 @@
 
 package de.blinkt.openvpn.core.connection;
 
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.*;
+
 import android.text.TextUtils;
 
 import com.google.gson.annotations.JsonAdapter;
@@ -42,7 +44,7 @@ public abstract class Connection implements Serializable, Cloneable {
         TCP("tcp"),
         KCP("kcp");
 
-        String protocol;
+        final String protocol;
 
         TransportProtocol(String transportProtocol) {
             this.protocol = transportProtocol;
@@ -55,11 +57,12 @@ public abstract class Connection implements Serializable, Cloneable {
     }
     public enum TransportType {
         OBFS4("obfs4"),
+        OBFS4_HOP("obfs4Hop"),
         OPENVPN("openvpn"),
 
         PT("metaTransport");
 
-        String transport;
+        final String transport;
 
         TransportType(String transportType) {
             this.transport = transportType;
@@ -70,12 +73,57 @@ public abstract class Connection implements Serializable, Cloneable {
             return transport;
         }
 
+        public int toInt() {
+            switch (this) {
+                case PT:
+                    return 0;
+                case OPENVPN:
+                    return 1;
+                case OBFS4:
+                    return 2;
+                case OBFS4_HOP:
+                    return 3;
+                default:
+                    return -1;
+            }
+        }
+
+        public static TransportType fromString(String value) {
+            switch (value) {
+                case "obfs4":
+                    return OBFS4;
+                case "obfs4-hop":
+                    return OBFS4_HOP;
+                case "metaTransport":
+                    return PT;
+                case "openvpn":
+                    return OPENVPN;
+                default:
+                    throw new IllegalArgumentException(value + " is not a valid value for TransportType.");
+            }
+        }
+
+        public static TransportType fromInt(int value) {
+            switch (value) {
+                case 0:
+                    return PT;
+                case 1:
+                    return OPENVPN;
+                case 2:
+                    return OBFS4;
+                case 3:
+                    return OBFS4_HOP;
+                default:
+                    return null;
+            }
+        }
+
         public boolean isPluggableTransport() {
-            return this == OBFS4 || this == PT;
+            return this == OBFS4 || this == OBFS4_HOP || this == PT;
         }
 
         public TransportType getMetaType() {
-            if (this == OBFS4 || this == PT) {
+            if (this == OBFS4 || this == OBFS4_HOP || this == PT) {
                 return PT;
             }
             return OPENVPN;
diff --git a/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4Connection.java b/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4Connection.java
index c77c23fd..73bfccdc 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4Connection.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4Connection.java
@@ -19,8 +19,8 @@ public class Obfs4Connection extends Connection {
 
     public Obfs4Connection(Obfs4Options options) {
         if (useObfsVpn()) {
-            setServerName(options.remoteIP);
-            setServerPort(options.remotePort);
+            setServerName(options.gatewayIP);
+            setServerPort(options.transport.getPorts()[0]);
             setProxyName(ObfsVpnClient.SOCKS_IP);
             setProxyPort(String.valueOf(ObfsVpnClient.SOCKS_PORT.get()));
             setProxyType(ProxyType.SOCKS5);
@@ -53,7 +53,7 @@ public class Obfs4Connection extends Connection {
     }
 
 
-    public Obfs4Options getDispatcherOptions() {
+    public Obfs4Options getObfs4Options() {
         return options;
     }
 
diff --git a/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4HopConnection.java b/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4HopConnection.java
new file mode 100644
index 00000000..f983ae20
--- /dev/null
+++ b/app/src/main/java/de/blinkt/openvpn/core/connection/Obfs4HopConnection.java
@@ -0,0 +1,48 @@
+package de.blinkt.openvpn.core.connection;
+
+import se.leap.bitmaskclient.pluggableTransports.HoppingObfsVpnClient;
+import se.leap.bitmaskclient.pluggableTransports.Obfs4Options;
+
+
+/**
+ * Created by cyberta on 08.03.19.
+ */
+
+public class Obfs4HopConnection extends Connection {
+
+    private static final String TAG = Obfs4HopConnection.class.getName();
+    private Obfs4Options options;
+
+    public Obfs4HopConnection(Obfs4Options options) {
+        setServerName(HoppingObfsVpnClient.IP);
+        setServerPort(String.valueOf(HoppingObfsVpnClient.PORT));
+        setProxyName("");
+        setProxyPort("");
+        setProxyType(ProxyType.NONE);
+
+
+        setUseUdp(true);
+        setProxyAuthUser(null);
+        setProxyAuthPassword(null);
+        setUseProxyAuth(false);
+        this.options = options;
+    }
+
+    @Override
+    public Connection clone() throws CloneNotSupportedException {
+        Obfs4HopConnection connection = (Obfs4HopConnection) super.clone();
+        connection.options = this.options;
+        return connection;
+    }
+
+    @Override
+    public TransportType getTransportType() {
+        return TransportType.OBFS4_HOP;
+    }
+
+
+    public Obfs4Options getObfs4Options() {
+        return options;
+    }
+
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/base/models/Constants.java b/app/src/main/java/se/leap/bitmaskclient/base/models/Constants.java
index ee5bd2a7..57467974 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/models/Constants.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/models/Constants.java
@@ -179,10 +179,19 @@ public interface Constants {
     String PORTS = "ports";
     String PROTOCOLS = "protocols";
     String UDP = "udp";
+    String TCP = "tcp";
+    String KCP = "kcp";
     String CAPABILITIES = "capabilities";
     String TRANSPORT = "transport";
     String TYPE = "type";
     String OPTIONS = "options";
+    String IAT_MODE = "iatMode";
+    String CERT = "cert";
+    String CERTS = "certs";
+    String ENDPOINTS = "endpoints";
+    String PORT_SEED = "port_seed";
+    String PORT_COUNT = "port_count";
+    String EXPERIMENTAL = "experimental";
     String VERSION = "version";
     String NAME = "name";
     String TIMEZONE = "timezone";
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 62fb1fd2..57653263 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
@@ -19,6 +19,7 @@ package se.leap.bitmaskclient.base.models;
 import static de.blinkt.openvpn.core.connection.Connection.TransportProtocol.KCP;
 import static de.blinkt.openvpn.core.connection.Connection.TransportProtocol.TCP;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4_HOP;
 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;
@@ -184,13 +185,13 @@ public final class Provider implements Parcelable {
 
     public boolean supportsPluggableTransports() {
         if (useObfsVpn()) {
-            return supportsTransports(new Pair[]{new Pair<>(OBFS4, TCP), new Pair<>(OBFS4, KCP)});
+            return supportsTransports(new Pair[]{new Pair<>(OBFS4, TCP), new Pair<>(OBFS4, KCP), new Pair<>(OBFS4_HOP, TCP), new Pair<>(OBFS4_HOP, KCP)});
         }
         return supportsTransports(new Pair[]{new Pair<>(OBFS4, TCP)});
     }
 
     public boolean supportsExperimentalPluggableTransports() {
-        return supportsTransports(new Pair[]{new Pair<>(OBFS4, KCP)});
+        return supportsTransports(new Pair[]{new Pair<>(OBFS4, KCP),  new Pair<>(OBFS4_HOP, TCP), new Pair<>(OBFS4_HOP, KCP)});
     }
 
     private boolean supportsTransports(Pair<TransportType, TransportProtocol>[] transportTypes) {
diff --git a/app/src/main/java/se/leap/bitmaskclient/base/models/Transport.java b/app/src/main/java/se/leap/bitmaskclient/base/models/Transport.java
index 90a033dd..7d9b61a7 100644
--- a/app/src/main/java/se/leap/bitmaskclient/base/models/Transport.java
+++ b/app/src/main/java/se/leap/bitmaskclient/base/models/Transport.java
@@ -1,21 +1,57 @@
 package se.leap.bitmaskclient.base.models;
 
+import androidx.annotation.Nullable;
+
+import com.google.gson.FieldNamingPolicy;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.annotations.SerializedName;
 
 import org.json.JSONObject;
 
-public class Transport {
+import java.io.Serializable;
+
+import de.blinkt.openvpn.core.connection.Connection;
+
+public class Transport implements Serializable {
     private String type;
     private String[] protocols;
+    @Nullable
     private String[] ports;
+    @Nullable
     private Options options;
 
     public Transport(String type, String[] protocols, String[] ports, String cert) {
+        this(type, protocols, ports, new Options(cert, "0"));
+    }
+
+    public Transport(String type, String[] protocols, String[] ports, Options options) {
         this.type = type;
         this.protocols = protocols;
         this.ports = ports;
-        this.options = new Options(cert);
+        this.options = options;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public Connection.TransportType getTransportType() {
+        return Connection.TransportType.fromString(type);
+    }
+
+    public String[] getProtocols() {
+        return protocols;
+    }
+
+    @Nullable
+    public String[] getPorts() {
+        return ports;
+    }
+
+    @Nullable
+    public Options getOptions() {
+        return options;
     }
 
     @Override
@@ -25,16 +61,65 @@ public class Transport {
 
     public static Transport fromJson(JSONObject json) {
         GsonBuilder builder = new GsonBuilder();
-        return builder.create().fromJson(json.toString(), Transport.class);
+        return builder.
+                setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES).
+                create().
+                fromJson(json.toString(), Transport.class);
     }
 
-    public static class Options {
+    public static class Options implements Serializable {
+        @Nullable
         private String cert;
+        @SerializedName("iatMode")
         private String iatMode;
 
-        public Options(String cert) {
+        @Nullable
+        private Endpoint[] endpoints;
+
+        private boolean experimental;
+
+        private int portSeed;
+
+        private int portCount;
+
+
+        public Options(String cert, String iatMode) {
             this.cert = cert;
-            this.iatMode = "0";
+            this.iatMode = iatMode;
+        }
+
+        public Options(String iatMode, Endpoint[] endpoints, int portSeed, int portCount, boolean experimental) {
+            this.iatMode = iatMode;
+            this.endpoints = endpoints;
+            this.portSeed = portSeed;
+            this.portCount = portCount;
+            this.experimental = experimental;
+        }
+
+        @Nullable
+        public String getCert() {
+            return cert;
+        }
+
+        public String getIatMode() {
+            return iatMode;
+        }
+
+        @Nullable
+        public Endpoint[] getEndpoints() {
+            return endpoints;
+        }
+
+        public boolean isExperimental() {
+            return experimental;
+        }
+
+        public int getPortSeed() {
+            return portSeed;
+        }
+
+        public int getPortCount() {
+            return portCount;
         }
 
         @Override
@@ -44,6 +129,29 @@ public class Transport {
     }
 
 
+    public static class Endpoint implements Serializable {
+        private String ip;
+        private String cert;
+
+        public Endpoint(String ip, String cert) {
+            this.ip = ip;
+            this.cert = cert;
+        }
+
+        @Override
+        public String toString() {
+            return new Gson().toJson(this);
+        }
+
+        public String getIp() {
+            return ip;
+        }
+
+        public String getCert() {
+            return cert;
+        }
+    }
+
 }
 
 
diff --git a/app/src/main/java/se/leap/bitmaskclient/eip/VpnConfigGenerator.java b/app/src/main/java/se/leap/bitmaskclient/eip/VpnConfigGenerator.java
index 141f6274..7229f7ff 100644
--- a/app/src/main/java/se/leap/bitmaskclient/eip/VpnConfigGenerator.java
+++ b/app/src/main/java/se/leap/bitmaskclient/eip/VpnConfigGenerator.java
@@ -17,19 +17,19 @@
 package se.leap.bitmaskclient.eip;
 
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4_HOP;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OPENVPN;
-import static de.blinkt.openvpn.core.connection.Connection.TransportType.PT;
 import static se.leap.bitmaskclient.base.models.Constants.CAPABILITIES;
 import static se.leap.bitmaskclient.base.models.Constants.IP_ADDRESS;
 import static se.leap.bitmaskclient.base.models.Constants.IP_ADDRESS6;
-import static se.leap.bitmaskclient.base.models.Constants.OPTIONS;
+import static se.leap.bitmaskclient.base.models.Constants.KCP;
 import static se.leap.bitmaskclient.base.models.Constants.PORTS;
 import static se.leap.bitmaskclient.base.models.Constants.PROTOCOLS;
 import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_PRIVATE_KEY;
 import static se.leap.bitmaskclient.base.models.Constants.PROVIDER_VPN_CERTIFICATE;
 import static se.leap.bitmaskclient.base.models.Constants.REMOTE;
+import static se.leap.bitmaskclient.base.models.Constants.TCP;
 import static se.leap.bitmaskclient.base.models.Constants.TRANSPORT;
-import static se.leap.bitmaskclient.base.models.Constants.TYPE;
 import static se.leap.bitmaskclient.base.models.Constants.UDP;
 import static se.leap.bitmaskclient.base.utils.ConfigHelper.ObfsVpnHelper.useObfsVpn;
 import static se.leap.bitmaskclient.pluggableTransports.ShapeshifterClient.DISPATCHER_IP;
@@ -54,14 +54,16 @@ import de.blinkt.openvpn.core.VpnStatus;
 import de.blinkt.openvpn.core.connection.Connection;
 import de.blinkt.openvpn.core.connection.Connection.TransportType;
 import se.leap.bitmaskclient.base.models.Provider;
+import se.leap.bitmaskclient.base.models.Transport;
 import se.leap.bitmaskclient.base.utils.ConfigHelper;
+import se.leap.bitmaskclient.pluggableTransports.HoppingObfsVpnClient;
 import se.leap.bitmaskclient.pluggableTransports.Obfs4Options;
 
 public class VpnConfigGenerator {
     private final JSONObject generalConfiguration;
     private final JSONObject gateway;
     private final JSONObject secrets;
-    private JSONObject obfs4Transport;
+    HashMap<TransportType, Transport> transports = new HashMap<>();
     private final int apiVersion;
     private final boolean preferUDP;
     private final boolean experimentalTransports;
@@ -113,19 +115,14 @@ public class VpnConfigGenerator {
 
     public void checkCapabilities() throws ConfigParser.ConfigParseError {
         try {
-
             if (apiVersion >= 3) {
                 JSONArray supportedTransports = gateway.getJSONObject(CAPABILITIES).getJSONArray(TRANSPORT);
                 for (int i = 0; i < supportedTransports.length(); i++) {
-                    JSONObject transport = supportedTransports.getJSONObject(i);
-                    if (transport.getString(TYPE).equals(OBFS4.toString())) {
-                        obfs4Transport = transport;
-                        break;
-                    }
+                    Transport transport = Transport.fromJson(supportedTransports.getJSONObject(i));
+                    transports.put(transport.getTransportType(), transport);
                 }
             }
-
-        } catch (JSONException e) {
+        } catch (Exception e) {
             throw new ConfigParser.ConfigParseError("Api version ("+ apiVersion +") did not match required JSON fields");
         }
     }
@@ -141,11 +138,15 @@ public class VpnConfigGenerator {
                 e.printStackTrace();
             }
         }
-        if (supportsObfs4()) {
-            try {
-                profiles.put(OBFS4, createProfile(OBFS4));
-            } catch (ConfigParser.ConfigParseError | NumberFormatException | JSONException | IOException e) {
-                e.printStackTrace();
+        if (apiVersion >= 3) {
+            for (TransportType transportType : transports.keySet()) {
+                if (transportType.isPluggableTransport()) {
+                    try {
+                        profiles.put(transportType, createProfile(transportType));
+                    } catch (ConfigParser.ConfigParseError | NumberFormatException | JSONException | IOException e) {
+                        e.printStackTrace();
+                    }
+                }
             }
         }
         if (profiles.isEmpty()) {
@@ -155,10 +156,9 @@ public class VpnConfigGenerator {
     }
 
     private boolean supportsOpenvpn() {
-        return !useObfuscationPinning && !gatewayConfiguration(OPENVPN).isEmpty();
-    }
-    private boolean supportsObfs4(){
-        return obfs4Transport != null || useObfuscationPinning;
+        return !useObfuscationPinning &&
+                ((apiVersion >= 3 && transports.containsKey(OPENVPN)) ||
+                        (apiVersion < 3 && !gatewayConfiguration(OPENVPN).isEmpty()));
     }
 
     private String getConfigurationString(TransportType transportType) {
@@ -176,11 +176,8 @@ public class VpnConfigGenerator {
         String configuration = getConfigurationString(transportType);
         ConfigParser icsOpenvpnConfigParser = new ConfigParser();
         icsOpenvpnConfigParser.parseConfig(new StringReader(configuration));
-        if (transportType == OBFS4) {
-            JSONArray protocols = obfs4Transport.getJSONArray(PROTOCOLS);
-            // FIXME: currently only one protocol per obfs4 bridge is supported in this client
-            String protocol = protocols.optString(0);
-            icsOpenvpnConfigParser.setObfs4Options(getObfs4Options(obfs4Transport, protocol.equalsIgnoreCase("kcp")));
+        if (transportType == OBFS4 || transportType == OBFS4_HOP) {
+            icsOpenvpnConfigParser.setObfs4Options(getObfs4Options(transportType));
         }
 
         VpnProfile profile = icsOpenvpnConfigParser.convertProfile(transportType);
@@ -192,21 +189,19 @@ public class VpnConfigGenerator {
         return profile;
     }
 
-    private Obfs4Options getObfs4Options(JSONObject transportJson, boolean useUdp) throws JSONException {
-        JSONObject transportOptions = transportJson.getJSONObject(OPTIONS);
-        String iatMode = transportOptions.getString("iatMode");
-        String cert = transportOptions.getString("cert");
-        String port = transportJson.getJSONArray(PORTS).getString(0);
+    private Obfs4Options getObfs4Options(TransportType transportType) throws JSONException {
         String ip = gateway.getString(IP_ADDRESS);
-        boolean udp = useUdp;
-
+        Transport transport;
         if (useObfuscationPinning) {
-            cert = obfuscationPinningCert;
-            port = obfuscationPinningPort;
+            transport = new Transport(OBFS4.toString(),
+                    new String[]{obfuscationPinningKCP ? KCP : TCP},
+                    new String[]{obfuscationPinningPort},
+                    obfuscationPinningCert);
             ip = obfuscationPinningIP;
-            udp = obfuscationPinningKCP;
+        } else {
+            transport = transports.get(transportType);
         }
-        return new Obfs4Options(ip, port, cert, iatMode, udp);
+        return new Obfs4Options(ip, transport);
     }
 
     private String generalConfiguration() {
@@ -254,8 +249,7 @@ public class VpnConfigGenerator {
                             new String[]{ipAddress} :
                             new String[]{ipAddress6, ipAddress};
 
-                    JSONArray transports = capabilities.getJSONArray(TRANSPORT);
-                    gatewayConfigMinApiv3(transportType, stringBuilder, ipAddresses, transports);
+                    gatewayConfigMinApiv3(transportType, stringBuilder, ipAddresses);
                     break;
             }
         } catch (JSONException e) {
@@ -271,11 +265,11 @@ public class VpnConfigGenerator {
         return remotes;
     }
 
-    private void gatewayConfigMinApiv3(TransportType transportType, StringBuilder stringBuilder, String[] ipAddresses, JSONArray transports) throws JSONException {
-        if (transportType.getMetaType() == PT) {
-            ptGatewayConfigMinApiv3(stringBuilder, ipAddresses, transportType, transports);
+    private void gatewayConfigMinApiv3(TransportType transportType, StringBuilder stringBuilder, String[] ipAddresses) throws JSONException {
+        if (transportType.isPluggableTransport()) {
+            ptGatewayConfigMinApiv3(stringBuilder, ipAddresses, transports.get(transportType));
         } else {
-            ovpnGatewayConfigMinApi3(stringBuilder, ipAddresses, transports);
+            ovpnGatewayConfigMinApi3(stringBuilder, ipAddresses, transports.get(OPENVPN));
         }
     }
 
@@ -294,19 +288,16 @@ public class VpnConfigGenerator {
         }
     }
 
-    private void ovpnGatewayConfigMinApi3(StringBuilder stringBuilder, String[] ipAddresses, JSONArray transports) throws JSONException {
-        String port;
-        String protocol;
-        JSONObject openvpnTransport = getTransport(transports, OPENVPN);
-        JSONArray ports = openvpnTransport.getJSONArray(PORTS);
-        JSONArray protocols = openvpnTransport.getJSONArray(PROTOCOLS);
+    private void ovpnGatewayConfigMinApi3(StringBuilder stringBuilder, String[] ipAddresses, Transport transport) {
+        if (transport.getProtocols() == null || transport.getPorts() == null) {
+            VpnStatus.logError("Misconfigured provider: missing details for transport openvpn on gateway " + ipAddresses[0]);
+            return;
+        }
         if (preferUDP) {
             StringBuilder udpRemotes = new StringBuilder();
             StringBuilder tcpRemotes = new StringBuilder();
-            for (int i = 0; i < protocols.length(); i++) {
-                protocol = protocols.optString(i);
-                for (int j = 0; j < ports.length(); j++) {
-                    port = ports.optString(j);
+            for (String protocol : transport.getProtocols()) {
+                for (String port : transport.getPorts()) {
                     for (String ipAddress : ipAddresses) {
                         String newRemote = REMOTE + " " + ipAddress + " " + port + " " + protocol + newLine;
                         if (UDP.equals(protocol)) {
@@ -320,10 +311,8 @@ public class VpnConfigGenerator {
             stringBuilder.append(udpRemotes.toString());
             stringBuilder.append(tcpRemotes.toString());
         } else {
-            for (int j = 0; j < ports.length(); j++) {
-                port = ports.getString(j);
-                for (int k = 0; k < protocols.length(); k++) {
-                    protocol = protocols.optString(k);
+            for (String protocol : transport.getProtocols()) {
+                for (String port : transport.getPorts()) {
                     for (String ipAddress : ipAddresses) {
                         String newRemote = REMOTE + " " + ipAddress + " " + port + " " + protocol + newLine;
                         stringBuilder.append(newRemote);
@@ -333,31 +322,18 @@ public class VpnConfigGenerator {
         }
     }
 
-    private JSONObject getTransport(JSONArray transports, TransportType transportType) throws JSONException {
-        JSONObject selectedTransport = new JSONObject();
-        for (int i = 0; i < transports.length(); i++) {
-            JSONObject transport = transports.getJSONObject(i);
-            if (transport.getString(TYPE).equals(transportType.toString())) {
-                selectedTransport = transport;
-                break;
-            }
-        }
-        return selectedTransport;
-    }
-
     private boolean isAllowedProtocol(TransportType transportType, String protocol) {
         switch (transportType) {
             case OPENVPN:
-                return "tcp".equals(protocol) || "udp".equals(protocol);
+                return TCP.equals(protocol) || UDP.equals(protocol);
+            case OBFS4_HOP:
             case OBFS4:
-                return "tcp".equals(protocol) || "kcp".equals(protocol);
+                return TCP.equals(protocol) || KCP.equals(protocol);
         }
         return false;
     }
 
-    private void ptGatewayConfigMinApiv3(StringBuilder stringBuilder, String[] ipAddresses, TransportType transportType, JSONArray transports) throws JSONException {
-        JSONObject ptTransport = getTransport(transports, transportType);
-        JSONArray ptProtocols = ptTransport.getJSONArray(PROTOCOLS);
+    private void ptGatewayConfigMinApiv3(StringBuilder stringBuilder, String[] ipAddresses, Transport transport) {
 
         //for now only use ipv4 gateway the syntax route remote_host 255.255.255.255 net_gateway is not yet working
         // https://community.openvpn.net/openvpn/ticket/1161
@@ -381,63 +357,97 @@ public class VpnConfigGenerator {
         }
 
         if (ipAddress == null) {
-            VpnStatus.logError("No matching IPv4 address found to configure obfs4.");
+            VpnStatus.logError("Misconfigured provider: No matching IPv4 address found to configure obfs4.");
             return;
         }
 
-        if (!useObfuscationPinning) {
-            // check if at least one openvpn protocol is TCP, openvpn in UDP is currently not supported for obfs4,
-            // however on the wire UDP might be used
-            boolean hasOpenvpnTcp = false;
-            JSONObject openvpnTransport = getTransport(transports, OPENVPN);
-            JSONArray gatewayProtocols = openvpnTransport.getJSONArray(PROTOCOLS);
-            for (int i = 0; i < gatewayProtocols.length(); i++) {
-                String protocol = gatewayProtocols.getString(i);
-                if (protocol.contains("tcp")) {
-                    hasOpenvpnTcp = true;
-                    break;
-                }
-            }
-            if (!hasOpenvpnTcp) {
-                VpnStatus.logError("obfs4 currently only allows openvpn in TCP mode! Skipping obfs4 config for ip " + ipAddress);
-                return;
-            }
-        }
-
-        boolean hasAllowedPTProtocol = false;
-        for (int i = 0; i < ptProtocols.length(); i++) {
-            String protocol = ptProtocols.getString(i);
-            if (isAllowedProtocol(transportType, protocol)) {
-                hasAllowedPTProtocol = true;
-                break;
-            }
+        if (!openvpnModeSupportsPt(transport, ipAddress) || !hasPTAllowedProtocol(transport, ipAddress)) {
+            return;
         }
 
-        if (!hasAllowedPTProtocol) {
-            VpnStatus.logError("Misconfigured provider: wrong protocol defined in  " + transportType.toString()+ " transport JSON.");
+        TransportType transportType = transport.getTransportType();
+        if (transportType == OBFS4 && transport.getPorts() == null) {
+            VpnStatus.logError("Misconfigured provider: no ports defined in " + transport.getType() + " transport JSON for gateway " + ipAddress);
             return;
         }
 
-        JSONArray ports = ptTransport.getJSONArray(PORTS);
-        if (ports.isNull(0)){
-            VpnStatus.logError("Misconfigured provider: no ports defined in " + transportType.toString()+ " transport JSON.");
+        if (transportType == OBFS4_HOP &&
+                (transport.getOptions() == null || transport.getOptions().getEndpoints() == null || transport.getOptions().getPortCount() == 0)) {
+            VpnStatus.logError("Misconfigured provider: missing properties for transport " + transport.getType() + " on gateway " + ipAddress);
             return;
         }
 
-        String route = "route " + ipAddress + " 255.255.255.255 net_gateway" + newLine;
-        String remote;
+        stringBuilder.append(getRouteString(ipAddress, transport));
+        stringBuilder.append(getRemoteString(ipAddress, transport));
+    }
+
+    public String getRemoteString(String ipAddress, Transport transport) {
         if (useObfsVpn()) {
             if (useObfuscationPinning) {
-                remote = REMOTE + " " + obfuscationPinningIP + " " + obfuscationPinningPort + " tcp" + newLine;
-                route = "route " + obfuscationPinningIP + " 255.255.255.255 net_gateway" + newLine;
-            } else {
-                remote = REMOTE + " " + ipAddress + " " + ports.getString(0) + " tcp" + newLine;
+                return REMOTE + " " + obfuscationPinningIP + " " + obfuscationPinningPort + " tcp" + newLine;
             }
-        } else {
-            remote = REMOTE + " " + DISPATCHER_IP + " " + DISPATCHER_PORT + " tcp" + newLine;
+            switch (transport.getTransportType()) {
+                case OBFS4:
+                    return REMOTE + " " + ipAddress + " " + transport.getPorts()[0] + " tcp" + newLine;
+                case OBFS4_HOP:
+                    return REMOTE + " " + HoppingObfsVpnClient.IP + " " + HoppingObfsVpnClient.PORT + " udp" + newLine;
+                default:
+                    VpnStatus.logError("Unexpected pluggable transport type " + transport.getType() + " for gateway " + ipAddress);
+                    return "";
+            }
+        }
+        return REMOTE + " " + DISPATCHER_IP + " " + DISPATCHER_PORT + " tcp" + newLine;
+    }
+
+    public String getRouteString(String ipAddress, Transport transport) {
+        if (useObfuscationPinning) {
+            return "route " + obfuscationPinningIP + " 255.255.255.255 net_gateway" + newLine;
+        }
+        if (transport.getTransportType() == OBFS4) {
+            return "route " + ipAddress + " 255.255.255.255 net_gateway" + newLine;
+        }
+        return newLine;
+    }
+
+    // While openvpn in TCP mode is required for obfs4, openvpn in UDP mode is required for obfs4-hop
+    private boolean openvpnModeSupportsPt(Transport transport, String ipAddress) {
+        if (useObfuscationPinning) {
+            // we don't know if the manually pinned bridge points to a openvpn gateway with the right
+            // configuration, so we assume yes
+            return true;
         }
-        stringBuilder.append(route);
-        stringBuilder.append(remote);
+        Transport openvpnTransport = transports.get(OPENVPN);
+        if (openvpnTransport == null) {
+            return false;
+        }
+
+        String[] protocols = openvpnTransport.getProtocols();
+        if (protocols == null) {
+            VpnStatus.logError("Misconfigured provider: Protocol array is missing for openvpn gateway " + ipAddress);
+            return false;
+        }
+
+        String requiredProtocol = transport.getTransportType() == OBFS4_HOP ? UDP : TCP;
+        for (String protocol : protocols) {
+            if (protocol.equals(requiredProtocol)) {
+                return true;
+            }
+        }
+
+        VpnStatus.logError("Misconfigured provider: " + transport.getTransportType().toString() + " currently only allows openvpn in " + requiredProtocol + " mode! Skipping config for ip " + ipAddress);
+        return false;
+    }
+
+    private boolean hasPTAllowedProtocol(Transport transport, String ipAddress) {
+        String[] ptProtocols = transport.getProtocols();
+        for (String protocol : ptProtocols) {
+            if (isAllowedProtocol(transport.getTransportType(), protocol)) {
+                return true;
+            }
+        }
+
+        VpnStatus.logError("Misconfigured provider: wrong protocol defined in  " + transport.getType() + " transport JSON for gateway " + ipAddress);
+        return false;
     }
 
     private String secretsConfiguration() {
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingConfig.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingConfig.java
new file mode 100644
index 00000000..e885166a
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingConfig.java
@@ -0,0 +1,49 @@
+package se.leap.bitmaskclient.pluggableTransports;
+
+import androidx.annotation.NonNull;
+
+import com.google.gson.FieldNamingPolicy;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import se.leap.bitmaskclient.base.models.Transport;
+
+public class HoppingConfig {
+    final boolean kcp;
+    final String proxyAddr;
+    final String[] remotes;
+    final String[] certs;
+    final int portSeed;
+    final int portCount;
+    final int minHopSeconds;
+    final int hopJitter;
+
+    public HoppingConfig(boolean kcp,
+                         String proxyAddr,
+                         Transport transport,
+                         int minHopSeconds,
+                         int hopJitter) {
+        this.kcp = kcp;
+        this.proxyAddr = proxyAddr;
+        Transport.Endpoint[] endpoints = transport.getOptions().getEndpoints();
+        this.remotes = new String[endpoints.length];
+        this.certs = new String[endpoints.length];
+        for (int i = 0; i < remotes.length; i++) {
+            remotes[i] = endpoints[i].getIp();
+            certs[i] = endpoints[i].getCert();
+        }
+        this.portSeed = transport.getOptions().getPortSeed();
+        this.portCount = transport.getOptions().getPortCount();
+        this.minHopSeconds = minHopSeconds;
+        this.hopJitter = hopJitter;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        Gson gson = new GsonBuilder()
+                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
+                .create();
+       return gson.toJson(this);
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingObfsVpnClient.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingObfsVpnClient.java
new file mode 100644
index 00000000..1b19213f
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingObfsVpnClient.java
@@ -0,0 +1,72 @@
+package se.leap.bitmaskclient.pluggableTransports;
+
+import static de.blinkt.openvpn.core.connection.Connection.TransportProtocol.KCP;
+
+import client.Client;
+import client.HopClient;
+import de.blinkt.openvpn.core.VpnStatus;
+import se.leap.bitmaskclient.base.models.Constants;
+
+public class HoppingObfsVpnClient implements PtClientInterface {
+
+    public static final int PORT = 8080;
+    public static final String IP = "127.0.0.1";
+
+    public final HopClient client;
+
+    public HoppingObfsVpnClient(Obfs4Options options) throws IllegalStateException {
+
+        //FIXME: use a different strategy here
+        //Basically we would want to track if the more performant transport protocol (KCP?/TCP?) usage was successful
+        //if so, we stick to it, otherwise we flip the flag
+        boolean kcp = Constants.KCP.equals(options.transport.getProtocols()[0]);
+
+        if (options.transport.getOptions().getEndpoints() == null) {
+            throw new IllegalStateException("No Endpoints for hopping pt detected!");
+        }
+
+        HoppingConfig hoppingConfig = new HoppingConfig(kcp,IP+":"+PORT, options.transport, 10, 10);
+        try {
+            client = Client.newFFIHopClient(hoppingConfig.toString());
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    @Override
+    public int start() {
+        try {
+            client.setEventLogger(this);
+            return client.start() ? PORT : 0;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return 0;
+        }
+    }
+
+    @Override
+    public void stop() {
+        try {
+            client.stop();
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            client.setEventLogger(null);
+        }
+    }
+
+    @Override
+    public boolean isStarted() {
+        return client.isStarted();
+    }
+
+    @Override
+    public void error(String s) {
+        VpnStatus.logError("[hopping-obfs4] " + s);
+    }
+
+    @Override
+    public void log(String state, String message) {
+        VpnStatus.logDebug("[hopping-obfs4] " + state + ": " + message);
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/Obfs4Options.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/Obfs4Options.java
index b96f88ca..0dd81eb8 100644
--- a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/Obfs4Options.java
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/Obfs4Options.java
@@ -2,20 +2,15 @@ package se.leap.bitmaskclient.pluggableTransports;
 
 import java.io.Serializable;
 
+import se.leap.bitmaskclient.base.models.Transport;
+
 public class Obfs4Options implements Serializable {
-    public String cert;
-    public String iatMode;
-    public String remoteIP;
-    public String remotePort;
-    // openvpn is still using tcp, obfs4 is wrapped in kcp, if udp == true
-    public boolean udp;
+    public String gatewayIP;
+    public Transport transport;
 
-    public Obfs4Options(String remoteIP, String remotePort, String cert, String iatMode, boolean udp) {
-        this.cert = cert;
-        this.iatMode = iatMode;
-        this.remoteIP = remoteIP;
-        this.remotePort = remotePort;
-        this.udp = udp;
+    public Obfs4Options(String gatewayIP,
+                        Transport transport) {
+        this.gatewayIP = gatewayIP;
+        this.transport = transport;
     }
-
 }
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ObfsVpnClient.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ObfsVpnClient.java
index f6c8837e..9d5ddcf9 100644
--- a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ObfsVpnClient.java
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ObfsVpnClient.java
@@ -1,5 +1,7 @@
 package se.leap.bitmaskclient.pluggableTransports;
 
+import static se.leap.bitmaskclient.base.models.Constants.KCP;
+
 import android.util.Log;
 
 import java.util.Observable;
@@ -7,12 +9,12 @@ import java.util.Observer;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import client.Client_;
+import client.Client;
 import de.blinkt.openvpn.core.ConnectionStatus;
 import de.blinkt.openvpn.core.VpnStatus;
 import se.leap.bitmaskclient.eip.EipStatus;
 
-public class ObfsVpnClient implements Observer, client.EventLogger {
+public class ObfsVpnClient implements Observer, PtClientInterface {
 
     public static final AtomicInteger SOCKS_PORT = new AtomicInteger(4430);
     public static final String SOCKS_IP = "127.0.0.1";
@@ -27,9 +29,17 @@ public class ObfsVpnClient implements Observer, client.EventLogger {
     private final client.Client_ obfsVpnClient;
     private final Object LOCK = new Object();
 
-    public ObfsVpnClient(Obfs4Options options) {
-        obfsVpnClient = new Client_(options.udp, SOCKS_IP+":"+SOCKS_PORT.get(), options.cert);
-        obfsVpnClient.setEventLogger(this);
+    public ObfsVpnClient(Obfs4Options options) throws IllegalStateException{
+        //FIXME: use a different strategy here
+        //Basically we would want to track if the more performant transport protocol (KCP?/TCP?) usage was successful
+        //if so, we stick to it, otherwise we flip the flag
+        boolean kcp = KCP.equals(options.transport.getProtocols()[0]);
+
+        if (options.transport.getOptions().getCert() == null) {
+            throw new IllegalStateException("No cert found to establish a obfs4 connection");
+        }
+
+        obfsVpnClient = Client.newClient(kcp, SOCKS_IP+":"+SOCKS_PORT.get(), options.transport.getOptions().getCert());
     }
 
     /**
@@ -38,6 +48,7 @@ public class ObfsVpnClient implements Observer, client.EventLogger {
      */
     public int start() {
         synchronized (LOCK) {
+            obfsVpnClient.setEventLogger(this);
             Log.d(TAG, "aquired LOCK");
             new Thread(this::startSync).start();
             waitUntilStarted();
@@ -46,6 +57,7 @@ public class ObfsVpnClient implements Observer, client.EventLogger {
         return SOCKS_PORT.get();
     }
 
+    // We're waiting here until the obfsvpn client has found a unbound port and started
     private void waitUntilStarted() {
         int count = -1;
         try {
@@ -88,6 +100,8 @@ public class ObfsVpnClient implements Observer, client.EventLogger {
             } catch (Exception e) {
                 e.printStackTrace();
                 VpnStatus.logError("[obfsvpn] " + e.getLocalizedMessage());
+            } finally {
+                obfsVpnClient.setEventLogger(null);
             }
             pendingNetworkErrorHandling.set(false);
             Log.d(TAG, "stopping obfsVpnClient releasing LOCK ...");
@@ -98,6 +112,7 @@ public class ObfsVpnClient implements Observer, client.EventLogger {
         return obfsVpnClient.isStarted();
     }
 
+    // TODO: register observer!
     @Override
     public void update(Observable observable, Object arg) {
         if (observable instanceof EipStatus) {
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientBuilder.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientBuilder.java
new file mode 100644
index 00000000..945e3d7a
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientBuilder.java
@@ -0,0 +1,18 @@
+package se.leap.bitmaskclient.pluggableTransports;
+
+import de.blinkt.openvpn.core.connection.Connection;
+import de.blinkt.openvpn.core.connection.Obfs4Connection;
+import de.blinkt.openvpn.core.connection.Obfs4HopConnection;
+
+public class PtClientBuilder {
+    public static PtClientInterface getPtClient(Connection connection) throws IllegalStateException {
+        switch (connection.getTransportType()) {
+            case OBFS4:
+                return new ObfsVpnClient(((Obfs4Connection) connection).getObfs4Options());
+            case OBFS4_HOP:
+                return new HoppingObfsVpnClient(((Obfs4HopConnection) connection).getObfs4Options());
+            default:
+                throw new IllegalStateException("Unexpected pluggable transport " + connection.getTransportType());
+        }
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientInterface.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientInterface.java
new file mode 100644
index 00000000..28d19a97
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/PtClientInterface.java
@@ -0,0 +1,9 @@
+package se.leap.bitmaskclient.pluggableTransports;
+
+import client.EventLogger;
+
+public interface PtClientInterface extends EventLogger {
+    int start();
+    void stop();
+    boolean isStarted();
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ShapeshifterClient.java b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ShapeshifterClient.java
index f1eb0f1b..102dcf35 100644
--- a/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ShapeshifterClient.java
+++ b/app/src/main/java/se/leap/bitmaskclient/pluggableTransports/ShapeshifterClient.java
@@ -42,6 +42,7 @@ public class ShapeshifterClient implements Observer {
     private int retry = 0;
     private final Handler reconnectHandler;
 
+    @Deprecated
     public class ShapeshifterLogger implements shapeshifter.Logger {
         @Override
         public void log(String s) {
@@ -71,8 +72,8 @@ public class ShapeshifterClient implements Observer {
 
     private void setup(Obfs4Options options) {
         shapeShifter.setSocksAddr(DISPATCHER_IP+":"+DISPATCHER_PORT);
-        shapeShifter.setTarget(options.remoteIP+":"+options.remotePort);
-        shapeShifter.setCert(options.cert);
+        shapeShifter.setTarget(options.gatewayIP +":"+options.transport.getPorts()[0]);
+        shapeShifter.setCert(options.transport.getOptions().getCert());
     }
 
     public void setOptions(Obfs4Options options) {
diff --git a/app/src/test/java/de/blinkt/openvpn/VpnProfileTest.java b/app/src/test/java/de/blinkt/openvpn/VpnProfileTest.java
index 5d3c0826..e5f9a9ca 100644
--- a/app/src/test/java/de/blinkt/openvpn/VpnProfileTest.java
+++ b/app/src/test/java/de/blinkt/openvpn/VpnProfileTest.java
@@ -3,11 +3,12 @@ package de.blinkt.openvpn;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
 import static org.powermock.api.mockito.PowerMockito.mockStatic;
 import static org.powermock.api.mockito.PowerMockito.when;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4_HOP;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OPENVPN;
+import static se.leap.bitmaskclient.base.models.Constants.UDP;
 
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -17,10 +18,12 @@ import org.junit.runner.RunWith;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
 
+import java.util.Arrays;
 import java.util.UUID;
 
 import de.blinkt.openvpn.core.connection.Obfs4Connection;
 import de.blinkt.openvpn.core.connection.OpenvpnConnection;
+import se.leap.bitmaskclient.base.models.Transport;
 import se.leap.bitmaskclient.base.utils.ConfigHelper;
 import se.leap.bitmaskclient.pluggableTransports.Obfs4Options;
 
@@ -28,10 +31,14 @@ import se.leap.bitmaskclient.pluggableTransports.Obfs4Options;
 @PrepareForTest({UUID.class, ConfigHelper.ObfsVpnHelper.class})
 public class VpnProfileTest {
 
-    private static final String OPENVPNCONNECTION_PROFILE   = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mUseObfs4\":false,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mUseUdp\":false,\"mServerName\":\"openvpn.example.com\",\"mProxyType\":\"NONE\",\"mProxyPort\":\"8080\",\"mUseCustomConfig\":false,\"mConnectTimeout\":0,\"mProxyName\":\"proxy.example.com\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.OpenvpnConnection\",\"mServerPort\":\"1194\",\"mEnabled\":true}],\"mUseLzo\":false,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
-    private static final String OBFS4CONNECTION_PROFILE = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mUseObfs4\":true,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"127.0.0.1\",\"mProxyType\":\"NONE\",\"mConnectTimeout\":0,\"mServerPort\":\"4430\",\"mUseUdp\":false,\"mProxyPort\":\"\",\"mUseCustomConfig\":false,\"options\":{\"udp\":false,\"remoteIP\":\"192.168.0.1\",\"iatMode\":\"1\",\"remotePort\":\"1234\",\"cert\":\"CERT\"},\"mProxyName\":\"\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
-    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mUseObfs4\":true,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"udp\":false,\"remoteIP\":\"192.168.0.1\",\"iatMode\":\"1\",\"remotePort\":\"1234\",\"cert\":\"CERT\"},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
-    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN_KCP = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mUseObfs4\":true,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"udp\":true,\"remoteIP\":\"192.168.0.1\",\"iatMode\":\"1\",\"remotePort\":\"1234\",\"cert\":\"CERT\"},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}\n";
+    private static final String OPENVPNCONNECTION_PROFILE   = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mUseUdp\":false,\"mServerName\":\"openvpn.example.com\",\"mProxyType\":\"NONE\",\"mProxyPort\":\"8080\",\"mUseCustomConfig\":false,\"mConnectTimeout\":0,\"mProxyName\":\"proxy.example.com\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.OpenvpnConnection\",\"mServerPort\":\"1194\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":1,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
+    private static final String OBFS4CONNECTION_PROFILE = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"127.0.0.1\",\"mProxyType\":\"NONE\",\"mConnectTimeout\":0,\"mServerPort\":\"4430\",\"mUseUdp\":false,\"mProxyPort\":\"\",\"mUseCustomConfig\":false,\"options\":{\"gatewayIP\":\"192.168.0.1\",\"transport\":{\"options\":{\"portCount\":0,\"iatMode\":\"0\",\"cert\":\"CERT\",\"experimental\":false,\"portSeed\":0},\"type\":\"obfs4\",\"protocols\":[\"tcp\"],\"ports\":[\"1234\"]}},\"mProxyName\":\"\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":2,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
+    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"gatewayIP\":\"192.168.0.1\",\"transport\":{\"options\":{\"portCount\":0,\"iatMode\":\"1\",\"cert\":\"CERT\",\"experimental\":false,\"portSeed\":0},\"type\":\"obfs4\",\"protocols\":[\"tcp\"],\"ports\":[\"1234\"]}},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":2,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}";
+    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN_KCP = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"gatewayIP\":\"192.168.0.1\",\"transport\":{\"options\":{\"portCount\":0,\"iatMode\":\"1\",\"cert\":\"CERT\",\"experimental\":false,\"portSeed\":0},\"type\":\"obfs4\",\"protocols\":[\"kcp\"],\"ports\":[\"1234\"]}},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":2,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}\n";
+
+    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN_HOP = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"gatewayIP\":\"192.168.0.1\",\"transport\":{\"options\":{\"portCount\":100,\"endpoints\":[{\"ip\":\"1.1.1.1\",\"cert\":\"CERT1\"},{\"ip\":\"2.2.2.2\",\"cert\":\"CERT2\"}],\"iatMode\":\"1\",\"experimental\":true,\"portSeed\":200},\"type\":\"obfs4\",\"protocols\":[\"tcp\"],\"ports\":[\"1234\"]}},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":3,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}\n";
+
+    private static final String OBFS4CONNECTION_PROFILE_OBFSVPN_HOP_KCP = "{\"mCipher\":\"\",\"mProfileVersion\":7,\"mLastUsed\":0,\"mCheckRemoteCN\":true,\"mVerb\":\"1\",\"mRemoteRandom\":false,\"mRoutenopull\":false,\"mConnectRetry\":\"2\",\"mAllowedAppsVpn\":[],\"mUserEditable\":true,\"mUseUdp\":true,\"mAllowedAppsVpnAreDisallowed\":true,\"mDNS1\":\"8.8.8.8\",\"mDNS2\":\"8.8.4.4\",\"mUseCustomConfig\":false,\"mUseFloat\":false,\"mUseDefaultRoute\":true,\"mConnectRetryMaxTime\":\"300\",\"mNobind\":true,\"mVersion\":0,\"mConnectRetryMax\":\"-1\",\"mOverrideDNS\":false,\"mAuth\":\"\",\"mTunMtu\":0,\"mPassword\":\"\",\"mTLSAuthDirection\":\"\",\"mKeyPassword\":\"\",\"mCustomConfigOptions\":\"\",\"mName\":\"mockProfile\",\"mExpectTLSCert\":false,\"mUsername\":\"\",\"mAllowLocalLAN\":false,\"mDataCiphers\":\"\",\"mSearchDomain\":\"blinkt.de\",\"mTemporaryProfile\":false,\"mUseTLSAuth\":false,\"mRemoteCN\":\"\",\"mCustomRoutesv6\":\"\",\"mPersistTun\":false,\"mX509AuthType\":3,\"mUuid\":\"9d295ca2-3789-48dd-996e-f731dbf50fdc\",\"mServerName\":\"openvpn.example.com\",\"mMssFix\":0,\"mPushPeerInfo\":false,\"mAuthenticationType\":2,\"mBlockUnusedAddressFamilies\":true,\"mServerPort\":\"1194\",\"mUseDefaultRoutev6\":true,\"mConnections\":[{\"mCustomConfiguration\":\"\",\"mServerName\":\"192.168.0.1\",\"mProxyType\":\"SOCKS5\",\"mConnectTimeout\":0,\"mServerPort\":\"1234\",\"mUseUdp\":false,\"mProxyPort\":\"4430\",\"mUseCustomConfig\":false,\"options\":{\"gatewayIP\":\"192.168.0.1\",\"transport\":{\"options\":{\"portCount\":100,\"endpoints\":[{\"ip\":\"1.1.1.1\",\"cert\":\"CERT1\"},{\"ip\":\"2.2.2.2\",\"cert\":\"CERT2\"}],\"iatMode\":\"1\",\"experimental\":true,\"portSeed\":2500},\"type\":\"obfs4\",\"protocols\":[\"kcp\"],\"ports\":[\"1234\"]}},\"mProxyName\":\"127.0.0.1\",\"mUseProxyAuth\":false,\"ConnectionAdapter.META_TYPE\":\"de.blinkt.openvpn.core.connection.Obfs4Connection\",\"mEnabled\":true}],\"mUseLzo\":false,\"mTransportType\":3,\"mAllowAppVpnBypass\":false,\"mUsePull\":true,\"mUseRandomHostname\":false,\"mAuthRetry\":0}\n";
 
     @Before
     public void setup() {
@@ -71,7 +78,9 @@ public class VpnProfileTest {
         when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(false);
 
         VpnProfile mockVpnProfile = new VpnProfile("mockProfile", OBFS4);
-        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", "1234", "CERT", "1", false));
+
+        Transport transport = new Transport(OBFS4.toString(), new String[]{"tcp"}, new String[]{"1234"}, "CERT");
+        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", transport));
         mockVpnProfile.mLastUsed = 0;
         String s = mockVpnProfile.toJson();
         System.out.println(s);
@@ -88,7 +97,9 @@ public class VpnProfileTest {
     public void toJson_obfs4_obfsvpn() throws JSONException {
         when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(true);
         VpnProfile mockVpnProfile = new VpnProfile("mockProfile", OBFS4);
-        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", "1234", "CERT", "1", false));
+        Transport.Options options = new Transport.Options("CERT", "1");
+        Transport transport = new Transport(OBFS4.toString(), new String[]{"tcp"}, new String[]{"1234"}, options);
+        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", transport));
         mockVpnProfile.mLastUsed = 0;
         String s = mockVpnProfile.toJson();
         System.out.println(s);
@@ -106,7 +117,9 @@ public class VpnProfileTest {
         when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(true);
 
         VpnProfile mockVpnProfile = new VpnProfile("mockProfile", OBFS4);
-        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", "1234", "CERT", "1", true));
+        Transport.Options options = new Transport.Options("CERT", "1");
+        Transport transport = new Transport(OBFS4.toString(), new String[]{"kcp"}, new String[]{"1234"}, options);
+        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", transport));
         mockVpnProfile.mLastUsed = 0;
         String s = mockVpnProfile.toJson();
         System.out.println(s);
@@ -120,6 +133,49 @@ public class VpnProfileTest {
     }
 
     @Test
+    public void toJson_obfs4hop_kcp() throws JSONException {
+        when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(true);
+
+        VpnProfile mockVpnProfile = new VpnProfile("mockProfile", OBFS4_HOP);
+
+        Transport.Options options = new Transport.Options("1", new Transport.Endpoint[]{new Transport.Endpoint("1.1.1.1", "CERT1"), new Transport.Endpoint("2.2.2.2", "CERT2")}, 2500, 100, true);
+        Transport transport = new Transport(OBFS4.toString(), new String[]{"kcp"}, new String[]{"1234"}, options);
+        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", transport));
+
+        mockVpnProfile.mLastUsed = 0;
+        String s = mockVpnProfile.toJson();
+        System.out.println(s);
+
+        //ignore UUID in comparison -> set it to fixed value
+        JSONObject actual = new JSONObject(s);
+        actual.put("mUuid", "9d295ca2-3789-48dd-996e-f731dbf50fdc");
+        JSONObject expectation = new JSONObject(OBFS4CONNECTION_PROFILE_OBFSVPN_HOP_KCP);
+
+        assertEquals(expectation.toString(),actual.toString());
+    }
+
+    @Test
+    public void toJson_obfs4hop() throws JSONException {
+        when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(true);
+
+        VpnProfile mockVpnProfile = new VpnProfile("mockProfile", OBFS4_HOP);
+        Transport.Options options = new Transport.Options("1", new Transport.Endpoint[]{new Transport.Endpoint("1.1.1.1", "CERT1"), new Transport.Endpoint("2.2.2.2", "CERT2")}, 200, 100, true);
+        Transport transport = new Transport(OBFS4.toString(), new String[]{"tcp"}, new String[]{"1234"}, options);
+        mockVpnProfile.mConnections[0] = new Obfs4Connection(new Obfs4Options("192.168.0.1", transport));
+
+        mockVpnProfile.mLastUsed = 0;
+        String s = mockVpnProfile.toJson();
+        System.out.println(s);
+
+        //ignore UUID in comparison -> set it to fixed value
+        JSONObject actual = new JSONObject(s);
+        actual.put("mUuid", "9d295ca2-3789-48dd-996e-f731dbf50fdc");
+        JSONObject expectation = new JSONObject(OBFS4CONNECTION_PROFILE_OBFSVPN_HOP);
+
+        assertEquals(expectation.toString(),actual.toString());
+    }
+
+    @Test
     public void fromJson_obfs4() {
         when(ConfigHelper.ObfsVpnHelper.useObfsVpn()).thenReturn(false);
 
@@ -130,11 +186,12 @@ public class VpnProfileTest {
         assertFalse(mockVpnProfile.mConnections[0].isUseUdp());
         Obfs4Connection obfs4Connection = (Obfs4Connection) mockVpnProfile.mConnections[0];
         assertEquals(OBFS4, obfs4Connection.getTransportType());
-        assertFalse(obfs4Connection.getDispatcherOptions().udp);
-        assertEquals("CERT", obfs4Connection.getDispatcherOptions().cert);
-        assertEquals("1", obfs4Connection.getDispatcherOptions().iatMode);
-        assertEquals("192.168.0.1", obfs4Connection.getDispatcherOptions().remoteIP);
-        assertEquals("1234", obfs4Connection.getDispatcherOptions().remotePort);
+        assertFalse(Arrays.asList(obfs4Connection.getObfs4Options().transport.getProtocols()).contains(UDP));
+        assertEquals("CERT", obfs4Connection.getObfs4Options().transport.getOptions().getCert());
+        assertEquals("0", obfs4Connection.getObfs4Options().transport.getOptions().getIatMode());
+        assertEquals("192.168.0.1", obfs4Connection.getObfs4Options().gatewayIP);
+        assertEquals("1234", obfs4Connection.getObfs4Options().transport.getPorts()[0]);
+        assertEquals(1, obfs4Connection.getObfs4Options().transport.getPorts().length);
     }
 
     @Test
@@ -148,11 +205,12 @@ public class VpnProfileTest {
         assertFalse(mockVpnProfile.mConnections[0].isUseUdp());
         Obfs4Connection obfs4Connection = (Obfs4Connection) mockVpnProfile.mConnections[0];
         assertEquals(OBFS4, obfs4Connection.getTransportType());
-        assertFalse(obfs4Connection.getDispatcherOptions().udp);
-        assertEquals("CERT", obfs4Connection.getDispatcherOptions().cert);
-        assertEquals("1", obfs4Connection.getDispatcherOptions().iatMode);
-        assertEquals("192.168.0.1", obfs4Connection.getDispatcherOptions().remoteIP);
-        assertEquals("1234", obfs4Connection.getDispatcherOptions().remotePort);
+        assertEquals("tcp", obfs4Connection.getObfs4Options().transport.getProtocols()[0]);
+        assertEquals("CERT", obfs4Connection.getObfs4Options().transport.getOptions().getCert());
+        assertEquals("1", obfs4Connection.getObfs4Options().transport.getOptions().getIatMode());
+        assertEquals("192.168.0.1", obfs4Connection.getObfs4Options().gatewayIP);
+        assertEquals("1234", obfs4Connection.getObfs4Options().transport.getPorts()[0]);
+        assertEquals(1, obfs4Connection.getObfs4Options().transport.getPorts().length);
     }
 
     @Test
@@ -166,10 +224,10 @@ public class VpnProfileTest {
         assertFalse(mockVpnProfile.mConnections[0].isUseUdp());
         Obfs4Connection obfs4Connection = (Obfs4Connection) mockVpnProfile.mConnections[0];
         assertEquals(OBFS4, obfs4Connection.getTransportType());
-        assertTrue(obfs4Connection.getDispatcherOptions().udp);
-        assertEquals("CERT", obfs4Connection.getDispatcherOptions().cert);
-        assertEquals("1", obfs4Connection.getDispatcherOptions().iatMode);
-        assertEquals("192.168.0.1", obfs4Connection.getDispatcherOptions().remoteIP);
-        assertEquals("1234", obfs4Connection.getDispatcherOptions().remotePort);
+        assertEquals("kcp", obfs4Connection.getObfs4Options().transport.getProtocols()[0]);
+        assertEquals("CERT", obfs4Connection.getObfs4Options().transport.getOptions().getCert());
+        assertEquals("1", obfs4Connection.getObfs4Options().transport.getOptions().getIatMode());
+        assertEquals("192.168.0.1", obfs4Connection.getObfs4Options().gatewayIP);
+        assertEquals("1234", obfs4Connection.getObfs4Options().transport.getPorts()[0]);
     }
 }
\ No newline at end of file
diff --git a/app/src/test/java/se/leap/bitmaskclient/base/models/GatewayJsonTest.java b/app/src/test/java/se/leap/bitmaskclient/base/models/GatewayJsonTest.java
index 61275378..801f98ad 100644
--- a/app/src/test/java/se/leap/bitmaskclient/base/models/GatewayJsonTest.java
+++ b/app/src/test/java/se/leap/bitmaskclient/base/models/GatewayJsonTest.java
@@ -12,7 +12,7 @@ public class GatewayJsonTest {
 
     @Test
     public void testToString() {
-        String gatewayJSON = "{\"location\":\"Unknown Location\",\"ip_address\":\"1.2.3.4\",\"host\":\"pinned.obfuscation.proxy\",\"capabilities\":{\"adblock\":false,\"filter_dns\":false,\"limited\":false,\"transport\":[{\"type\":\"obfs4\",\"protocols\":[\"tcp\"],\"ports\":[\"1194\"],\"options\":{\"cert\":\"xxxxxxx\",\"iatMode\":\"0\"}}],\"user_ips\":false}}";
+        String gatewayJSON = "{\"location\":\"Unknown Location\",\"ip_address\":\"1.2.3.4\",\"host\":\"pinned.obfuscation.proxy\",\"capabilities\":{\"adblock\":false,\"filter_dns\":false,\"limited\":false,\"transport\":[{\"type\":\"obfs4\",\"protocols\":[\"tcp\"],\"ports\":[\"1194\"],\"options\":{\"cert\":\"xxxxxxx\",\"iatMode\":\"0\",\"experimental\":false,\"portSeed\":0,\"portCount\":0}}],\"user_ips\":false}}";
 
         Connection.TransportType transportType = OBFS4;
         Transport[] transports = new Transport[]{
diff --git a/app/src/test/java/se/leap/bitmaskclient/base/models/TransportTest.java b/app/src/test/java/se/leap/bitmaskclient/base/models/TransportTest.java
new file mode 100644
index 00000000..37dfc161
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/base/models/TransportTest.java
@@ -0,0 +1,68 @@
+package se.leap.bitmaskclient.base.models;
+
+import static se.leap.bitmaskclient.base.models.Constants.CAPABILITIES;
+import static se.leap.bitmaskclient.base.models.Constants.TRANSPORT;
+
+import junit.framework.TestCase;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.IOException;
+
+import de.blinkt.openvpn.core.connection.Connection;
+import se.leap.bitmaskclient.testutils.TestSetupHelper;
+
+public class TransportTest extends TestCase {
+
+    private JSONObject gateway;
+
+    public void test_obfs4_fromJson() throws IOException, JSONException {
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_tcp_gateways.json"))).getJSONArray("gateways").getJSONObject(2);
+        JSONObject obfs4Transport = gateway.getJSONObject(CAPABILITIES).getJSONArray(TRANSPORT).getJSONObject(1);
+        Transport transport = Transport.fromJson(obfs4Transport);
+        assertEquals("obfs4", transport.getType());
+        assertEquals("0", transport.getOptions().getIatMode());
+        assertEquals("kcp", transport.getProtocols()[0]);
+        assertEquals(1, transport.getProtocols().length);
+        assertEquals("23050", transport.getPorts()[0]);
+        assertEquals(1, transport.getPorts().length);
+        assertEquals("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1", transport.getOptions().getCert());
+        assertNull(transport.getOptions().getEndpoints());
+        assertEquals(0, transport.getOptions().getPortCount());
+        assertEquals(0, transport.getOptions().getPortSeed());
+        assertFalse(transport.getOptions().isExperimental());
+    }
+
+    public void test_obfs4hop_fromJson() throws IOException, JSONException {
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_tcp_gateways.json"))).getJSONArray("gateways").getJSONObject(2);
+        JSONObject obfs4Transport = gateway.getJSONObject(CAPABILITIES).getJSONArray(TRANSPORT).getJSONObject(2);
+        Transport transport = Transport.fromJson(obfs4Transport);
+        assertEquals("obfs4-hop", transport.getType());
+        assertEquals(Connection.TransportType.OBFS4_HOP, transport.getTransportType());
+        assertEquals("tcp", transport.getProtocols()[0]);
+        assertEquals(1, transport.getProtocols().length);
+        assertNull(transport.getPorts());
+        assertNull(transport.getOptions().getCert());
+        assertNotNull(transport.getOptions().getEndpoints());
+        assertEquals(2, transport.getOptions().getEndpoints().length);
+        assertEquals("CERT1", transport.getOptions().getEndpoints()[0].getCert());
+        assertEquals("CERT2", transport.getOptions().getEndpoints()[1].getCert());
+        assertEquals("1.1.1.1", transport.getOptions().getEndpoints()[0].getIp());
+        assertEquals("2.2.2.2", transport.getOptions().getEndpoints()[1].getIp());
+        assertTrue(transport.getOptions().isExperimental());
+    }
+
+    public void test_openvpn_fromJson() throws IOException, JSONException {
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_tcp_gateways.json"))).getJSONArray("gateways").getJSONObject(2);
+        JSONObject obfs4Transport = gateway.getJSONObject(CAPABILITIES).getJSONArray(TRANSPORT).getJSONObject(0);
+        Transport transport = Transport.fromJson(obfs4Transport);
+        assertEquals("openvpn", transport.getType());
+        assertEquals(2, transport.getProtocols().length);
+        assertEquals("tcp", transport.getProtocols()[0]);
+        assertEquals("udp", transport.getProtocols()[1]);
+        assertEquals(1, transport.getPorts().length);
+        assertEquals("1195", transport.getPorts()[0]);
+        assertNull(transport.getOptions());
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java b/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
index 6b1c5bf3..99e71f05 100644
--- a/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
+++ b/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
@@ -9,6 +9,7 @@ import static org.mockito.Mockito.mock;
 import static org.powermock.api.mockito.PowerMockito.mockStatic;
 import static org.powermock.api.mockito.PowerMockito.when;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4;
+import static de.blinkt.openvpn.core.connection.Connection.TransportType.OBFS4_HOP;
 import static de.blinkt.openvpn.core.connection.Connection.TransportType.OPENVPN;
 import static se.leap.bitmaskclient.base.models.Constants.OPENVPN_CONFIGURATION;
 import static se.leap.bitmaskclient.testutils.MockHelper.mockTextUtils;
@@ -34,6 +35,7 @@ import java.util.HashMap;
 import de.blinkt.openvpn.VpnProfile;
 import de.blinkt.openvpn.core.connection.Connection;
 import de.blinkt.openvpn.core.connection.Obfs4Connection;
+import de.blinkt.openvpn.core.connection.Obfs4HopConnection;
 import se.leap.bitmaskclient.base.utils.ConfigHelper;
 import se.leap.bitmaskclient.testutils.MockHelper;
 import se.leap.bitmaskclient.testutils.TestSetupHelper;
@@ -1696,9 +1698,8 @@ public class VpnConfigGeneratorTest {
         configuration.preferUDP = true;
         vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway, configuration);
         HashMap<Connection.TransportType, VpnProfile> vpnProfiles = vpnConfigGenerator.generateVpnProfiles();
-        assertTrue(vpnProfiles.containsKey(OBFS4) && ((Obfs4Connection)vpnProfiles.get(OBFS4).mConnections[0]).getDispatcherOptions().udp);
+        assertTrue(vpnProfiles.containsKey(OBFS4) && ((Obfs4Connection)vpnProfiles.get(OBFS4).mConnections[0]).getObfs4Options().transport.getProtocols()[0].equals("kcp"));
         assertTrue(vpnProfiles.containsKey(OPENVPN));
-
     }
 
     @Test
@@ -1715,16 +1716,20 @@ public class VpnConfigGeneratorTest {
     }
 
     @Test
-    public void testGenerateVpnProfile_ObfuscationPinningEnabled_obfs4AndOpenvpnProfile () throws Exception {
+    public void testGenerateVpnProfile_ObfuscationPinningNotEnabled_obfs4AndOpenvpnProfile () throws Exception {
         gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_kcp_gateways.json"))).getJSONArray("gateways").getJSONObject(1);
         generalConfig = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_kcp_gateways.json"))).getJSONObject(OPENVPN_CONFIGURATION);
         VpnConfigGenerator.Configuration configuration = new VpnConfigGenerator.Configuration();
         configuration.apiVersion = 3;
-        configuration.useObfuscationPinning = true;
+        configuration.useObfuscationPinning = false;
+        configuration.obfuscationProxyPort = "443";
+        configuration.obfuscationProxyIP = "5.6.7.8";
+        configuration.obfuscationProxyCert = "asdfasdf";
+        configuration.obfuscationProxyKCP = true;
         configuration.remoteGatewayIP = "1.2.3.4";
         vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway, configuration);
         HashMap<Connection.TransportType, VpnProfile> vpnProfiles = vpnConfigGenerator.generateVpnProfiles();
-        assertFalse("has no openvpn profile", vpnProfiles.containsKey(OPENVPN));
+        assertTrue("has openvpn profile", vpnProfiles.containsKey(OPENVPN));
         assertTrue("has obfs4 profile", vpnProfiles.containsKey(OBFS4));
         assertTrue("bridge is running KCP", vpnProfiles.get(OBFS4).mGatewayIp.equals("1.2.3.4"));
 
@@ -1747,7 +1752,7 @@ public class VpnConfigGeneratorTest {
         assertFalse("has openvpn profile", vpnProfiles.containsKey(OPENVPN));
         assertTrue("has obfs4 profile", vpnProfiles.containsKey(OBFS4));
         assertTrue("bridge is pinned one", vpnProfiles.get(OBFS4).getTransportType() == OBFS4 && !vpnProfiles.get(OBFS4).mConnections[0].isUseUdp() );
-        assertTrue("bridge is running KCP", ((Obfs4Connection) vpnProfiles.get(OBFS4).mConnections[0]).getDispatcherOptions().udp == false);
+        assertTrue("bridge is running TCP", ((Obfs4Connection) vpnProfiles.get(OBFS4).mConnections[0]).getObfs4Options().transport.getProtocols()[0].equals("tcp"));
     }
 
     @Test
@@ -1768,7 +1773,29 @@ public class VpnConfigGeneratorTest {
         assertFalse("has openvpn profile", vpnProfiles.containsKey(OPENVPN));
         assertTrue("has no obfs4 profile", vpnProfiles.containsKey(OBFS4));
         assertTrue("bridge is pinned one", vpnProfiles.get(OBFS4).getTransportType() == OBFS4 && vpnProfiles.get(OBFS4).mGatewayIp.equals("1.2.3.4"));
-        assertTrue("bridge is running KCP", ((Obfs4Connection) vpnProfiles.get(OBFS4).mConnections[0]).getDispatcherOptions().udp == true);
+        assertTrue("bridge is running KCP", ((Obfs4Connection) vpnProfiles.get(OBFS4).mConnections[0]).getObfs4Options().transport.getProtocols()[0].equals("kcp"));
+    }
+    @Test
+    public void testGenerateVpnProfile_obfs4hop_tcp () throws Exception {
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_tcp_gateways.json"))).getJSONArray("gateways").getJSONObject(2);
+        generalConfig = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_tcp_gateways.json"))).getJSONObject(OPENVPN_CONFIGURATION);
+        VpnConfigGenerator.Configuration configuration = new VpnConfigGenerator.Configuration();
+        configuration.apiVersion = 3;
+        vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway, configuration);
+        HashMap<Connection.TransportType, VpnProfile> vpnProfiles = vpnConfigGenerator.generateVpnProfiles();
+        assertTrue(vpnProfiles.containsKey(OBFS4_HOP) && ((Obfs4HopConnection)vpnProfiles.get(OBFS4_HOP).mConnections[0]).getObfs4Options().transport.getProtocols()[0].equals("tcp"));
+        assertTrue(vpnProfiles.containsKey(OPENVPN));
     }
 
+    @Test
+    public void testGenerateVpnProfile_obfs4hop_kcp () throws Exception {
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_kcp_gateways.json"))).getJSONArray("gateways").getJSONObject(2);
+        generalConfig = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("ptdemo_obfs4hop_kcp_gateways.json"))).getJSONObject(OPENVPN_CONFIGURATION);
+        VpnConfigGenerator.Configuration configuration = new VpnConfigGenerator.Configuration();
+        configuration.apiVersion = 3;
+        vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway, configuration);
+        HashMap<Connection.TransportType, VpnProfile> vpnProfiles = vpnConfigGenerator.generateVpnProfiles();
+        assertTrue(vpnProfiles.containsKey(OBFS4_HOP) && ((Obfs4HopConnection)vpnProfiles.get(OBFS4_HOP).mConnections[0]).getObfs4Options().transport.getProtocols()[0].equals("kcp"));
+        assertTrue(vpnProfiles.containsKey(OPENVPN));
+    }
 }
\ No newline at end of file
diff --git a/app/src/test/resources/ptdemo_obfs4hop_kcp_gateways.json b/app/src/test/resources/ptdemo_obfs4hop_kcp_gateways.json
new file mode 100644
index 00000000..a56bc571
--- /dev/null
+++ b/app/src/test/resources/ptdemo_obfs4hop_kcp_gateways.json
@@ -0,0 +1,178 @@
+{
+  "gateways":[
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "23049"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"pt.demo.bitmask.net",
+      "ip_address":"37.218.247.60",
+      "location":"Amsterdam"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "kcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"moscow.bitmask.net",
+      "ip_address":"3.21.247.89",
+      "location":"moscow"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp",
+              "udp"
+            ],
+
+            "ports":[
+              "1195"
+            ]
+          },
+          {
+            "type":"obfs4",
+            "protocols":[
+              "kcp"
+            ],
+            "ports":[
+              "23050"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "kcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"manila.bitmask.net",
+      "ip_address":"37.12.247.10",
+      "location":"manila"
+    }
+  ],
+  "locations":{
+    "Amsterdam":{
+      "country_code":"NL",
+      "hemisphere":"N",
+      "name":"Amsterdam",
+      "timezone":"-1"
+    },
+    "moscow": {
+      "country_code": "RU",
+      "hemisphere": "N",
+      "name": "Moscow",
+      "timezone": "+3"
+    },
+    "manila": {
+      "country_code": "PH",
+      "hemisphere": "N",
+      "name": "Manila",
+      "timezone": "+8"
+    }
+  },
+  "openvpn_configuration":{
+    "auth":"SHA1",
+    "cipher":"AES-256-CBC",
+    "keepalive":"10 30",
+    "tls-cipher":"DHE-RSA-AES128-SHA",
+    "tun-ipv6":true,
+    "dev" : "tun",
+    "sndbuf" : "0",
+    "rcvbuf" : "0",
+    "nobind" : true,
+    "persist-key" : true,
+    "key-direction" : "1",
+    "verb" : "3"
+  },
+  "serial":2,
+  "version":3
+}
\ No newline at end of file
diff --git a/app/src/test/resources/ptdemo_obfs4hop_misconfigured_udp_gateway.json b/app/src/test/resources/ptdemo_obfs4hop_misconfigured_udp_gateway.json
new file mode 100644
index 00000000..a56bc571
--- /dev/null
+++ b/app/src/test/resources/ptdemo_obfs4hop_misconfigured_udp_gateway.json
@@ -0,0 +1,178 @@
+{
+  "gateways":[
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "23049"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"pt.demo.bitmask.net",
+      "ip_address":"37.218.247.60",
+      "location":"Amsterdam"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "kcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"moscow.bitmask.net",
+      "ip_address":"3.21.247.89",
+      "location":"moscow"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp",
+              "udp"
+            ],
+
+            "ports":[
+              "1195"
+            ]
+          },
+          {
+            "type":"obfs4",
+            "protocols":[
+              "kcp"
+            ],
+            "ports":[
+              "23050"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "kcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"manila.bitmask.net",
+      "ip_address":"37.12.247.10",
+      "location":"manila"
+    }
+  ],
+  "locations":{
+    "Amsterdam":{
+      "country_code":"NL",
+      "hemisphere":"N",
+      "name":"Amsterdam",
+      "timezone":"-1"
+    },
+    "moscow": {
+      "country_code": "RU",
+      "hemisphere": "N",
+      "name": "Moscow",
+      "timezone": "+3"
+    },
+    "manila": {
+      "country_code": "PH",
+      "hemisphere": "N",
+      "name": "Manila",
+      "timezone": "+8"
+    }
+  },
+  "openvpn_configuration":{
+    "auth":"SHA1",
+    "cipher":"AES-256-CBC",
+    "keepalive":"10 30",
+    "tls-cipher":"DHE-RSA-AES128-SHA",
+    "tun-ipv6":true,
+    "dev" : "tun",
+    "sndbuf" : "0",
+    "rcvbuf" : "0",
+    "nobind" : true,
+    "persist-key" : true,
+    "key-direction" : "1",
+    "verb" : "3"
+  },
+  "serial":2,
+  "version":3
+}
\ No newline at end of file
diff --git a/app/src/test/resources/ptdemo_obfs4hop_tcp_gateways.json b/app/src/test/resources/ptdemo_obfs4hop_tcp_gateways.json
new file mode 100644
index 00000000..6a748a4f
--- /dev/null
+++ b/app/src/test/resources/ptdemo_obfs4hop_tcp_gateways.json
@@ -0,0 +1,178 @@
+{
+  "gateways":[
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "23049"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"pt.demo.bitmask.net",
+      "ip_address":"37.218.247.60",
+      "location":"Amsterdam"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "tcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "/ntRNI6JYP7R6kGKldibKWj0aCsv96Hdu/jSGncPy+rcverCLI7Emod+vRkz61hM7F/udA"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          },
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp"
+            ],
+            "ports":[
+              "1195"
+            ]
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"moscow.bitmask.net",
+      "ip_address":"3.21.247.89",
+      "location":"moscow"
+    },
+    {
+      "capabilities":{
+        "adblock":false,
+        "filter_dns":false,
+        "limited":false,
+        "transport":[
+          {
+            "type":"openvpn",
+            "protocols":[
+              "tcp",
+              "udp"
+            ],
+
+            "ports":[
+              "1195"
+            ]
+          },
+          {
+            "type":"obfs4",
+            "protocols":[
+              "kcp"
+            ],
+            "ports":[
+              "23050"
+            ],
+            "options": {
+              "cert": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX1",
+              "iatMode": "0"
+            }
+          },
+          {
+            "type":"obfs4-hop",
+            "protocols":[
+              "tcp"
+            ],
+            "options": {
+              "iatMode": "0",
+              "endpoints": [
+                {
+                  "ip": "1.1.1.1",
+                  "cert": "CERT1"
+                },
+                {
+                  "ip": "2.2.2.2",
+                  "cert": "CERT2"
+                }
+              ],
+              "port_seed": 94,
+              "port_count": 100,
+              "experimental": true
+            }
+          }
+        ],
+        "user_ips":false
+      },
+      "host":"manila.bitmask.net",
+      "ip_address":"37.12.247.10",
+      "location":"manila"
+    }
+  ],
+  "locations":{
+    "Amsterdam":{
+      "country_code":"NL",
+      "hemisphere":"N",
+      "name":"Amsterdam",
+      "timezone":"-1"
+    },
+    "moscow": {
+      "country_code": "RU",
+      "hemisphere": "N",
+      "name": "Moscow",
+      "timezone": "+3"
+    },
+    "manila": {
+      "country_code": "PH",
+      "hemisphere": "N",
+      "name": "Manila",
+      "timezone": "+8"
+    }
+  },
+  "openvpn_configuration":{
+    "auth":"SHA1",
+    "cipher":"AES-256-CBC",
+    "keepalive":"10 30",
+    "tls-cipher":"DHE-RSA-AES128-SHA",
+    "tun-ipv6":true,
+    "dev" : "tun",
+    "sndbuf" : "0",
+    "rcvbuf" : "0",
+    "nobind" : true,
+    "persist-key" : true,
+    "key-direction" : "1",
+    "verb" : "3"
+  },
+  "serial":2,
+  "version":3
+}
\ No newline at end of file