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package se.leap.bitmaskclient.tor;
import android.content.Context;
import android.util.Log;
import androidx.annotation.Nullable;
import org.torproject.jni.ClientTransportPluginInterface;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.ref.WeakReference;
import java.util.HashMap;
import IPtProxy.IPtProxy;
public class ClientTransportPlugin implements ClientTransportPluginInterface {
public static String TAG = ClientTransportPlugin.class.getSimpleName();
private HashMap<String, String> mFronts;
private final WeakReference<Context> contextRef;
private long snowflakePort = -1;
public ClientTransportPlugin(Context context) {
this.contextRef = new WeakReference<>(context);
loadCdnFronts(context);
}
@Override
public void start() {
Context context = contextRef.get();
if (context == null) {
return;
}
File logfile = new File(context.getApplicationContext().getCacheDir(), "snowflake.log");
Log.d(TAG, "logfile at " + logfile.getAbsolutePath());
if (!logfile.exists()) {
try {
logfile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
//this is using the current, default Tor snowflake infrastructure
String target = getCdnFront("snowflake-target");
String front = getCdnFront("snowflake-front");
String stunServer = getCdnFront("snowflake-stun");
Log.d(TAG, "startSnowflake. target: " + target + ", front:" + front + ", stunServer" + stunServer);
snowflakePort = IPtProxy.startSnowflake( stunServer, target, front, logfile.getAbsolutePath(), false, false, true, 1);
Log.d(TAG, "startSnowflake running on port: " + snowflakePort);
}
@Override
public void stop() {
IPtProxy.stopSnowflake();
snowflakePort = -1;
}
@Override
public String getTorrc() {
return "UseBridges 1\n" +
"ClientTransportPlugin snowflake socks5 127.0.0.1:" + snowflakePort + "\n" +
"Bridge snowflake 192.0.2.3:1";
}
private void loadCdnFronts(Context context) {
if (mFronts == null) {
mFronts = new HashMap<>();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(context.getAssets().open("fronts")));
String line;
while (true) {
line = reader.readLine();
if (line == null) break;
String[] front = line.split(" ");
mFronts.put(front[0], front[1]);
Log.d(TAG, "front: " + front[0] + ", " + front[1]);
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Nullable
private String getCdnFront(String service) {
if (mFronts != null) {
return mFronts.get(service);
}
return null;
}
}
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