From 939901a89abb169648423473056260335d3af639 Mon Sep 17 00:00:00 2001
From: cyBerta <cyberta@riseup.net>
Date: Thu, 6 Apr 2023 01:08:05 +0200
Subject: first pass on obfs4-hop pt integration

---
 .../pluggableTransports/HoppingObfsVpnClient.java  | 72 ++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingObfsVpnClient.java

(limited to 'app/src/main/java/se/leap/bitmaskclient/pluggableTransports/HoppingObfsVpnClient.java')

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);
+    }
+}
-- 
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