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- package de.tudarmstadt.informatik.hostage;
- import java.io.IOException;
- import java.net.ServerSocket;
- import java.net.Socket;
- import java.util.ArrayList;
- import java.util.Iterator;
- import javax.net.ssl.SSLContext;
- import javax.net.ssl.SSLSocket;
- import javax.net.ssl.SSLSocketFactory;
- import android.content.Context;
- import android.content.SharedPreferences;
- import android.content.SharedPreferences.Editor;
- import android.preference.PreferenceManager;
- import android.util.Log;
- import de.tudarmstadt.informatik.hostage.commons.HelperUtils;
- import de.tudarmstadt.informatik.hostage.location.MyLocationManager;
- import de.tudarmstadt.informatik.hostage.logging.AttackRecord;
- import de.tudarmstadt.informatik.hostage.logging.Logger;
- import de.tudarmstadt.informatik.hostage.logging.NetworkRecord;
- import de.tudarmstadt.informatik.hostage.net.MyServerSocketFactory;
- import de.tudarmstadt.informatik.hostage.protocol.Protocol;
- import de.tudarmstadt.informatik.hostage.protocol.SMB;
- import de.tudarmstadt.informatik.hostage.protocol.SSLProtocol;
- /**
- * Protocol listener class:<br>
- * Creates a Socket on the port of a given protocol and listens for incoming
- * connections.<br>
- * For each connection creates a Socket and instantiate an {@link Handler}.
- *
- * @author Mihai Plasoianu
- * @author Wulf Pfeiffer
- */
- public class Listener implements Runnable {
- private ArrayList<Handler> handlers = new ArrayList<Handler>();
- private Protocol protocol;
- private ServerSocket server;
- private Thread thread;
- private int port;
- private Hostage service;
- private ConnectionRegister conReg;
- private boolean running = false;
- /**
- * Constructor for the class. Instantiate class variables.
- *
- * @param service
- * The Background service that started the listener.
- * @param protocol
- * The Protocol on which the listener is running.
- */
- public Listener(Hostage service, Protocol protocol) {
- this.service = service;
- this.protocol = protocol;
- port = protocol.getPort();
- conReg = new ConnectionRegister(service);
- }
- public Listener(Hostage service, Protocol protocol, int port) {
- this.service = service;
- this.protocol = protocol;
- this.port = port;
- conReg = new ConnectionRegister(service);
- }
- /**
- * Determines the amount of active handlers.
- *
- * @return The number of active handlers.
- */
- public int getHandlerCount() {
- return handlers.size();
- }
- /**
- * Return the port number on which the listener listening.
- *
- * @return Used port number.
- */
- public int getPort() {
- return port;
- }
- /**
- * Determine the name of the protocol the listener is running on.
- *
- * @return Name of the protocol
- */
- public String getProtocolName() {
- return protocol.toString();
- }
- /**
- * Determines if the service is running.
- *
- * @return True if the service is running, else false.
- */
- public boolean isRunning() {
- return running;
- }
- /**
- * Remove all terminated handlers from its internal ArrayList.
- */
- public void refreshHandlers() {
- for (Iterator<Handler> iterator = handlers.iterator(); iterator.hasNext();) {
- Handler handler = iterator.next();
- if (handler.isTerminated()) {
- conReg.closeConnection();
- iterator.remove();
- }
- }
- }
- @Override
- public void run() {
- while (!thread.isInterrupted()) {
- addHandler();
- }
- for (Handler handler : handlers) {
- //TODO kann ConcurrentModificationException auslösen, da über collection iteriert wird während elemente entfernt werden
- handler.kill();
- }
- }
- /**
- * Starts the listener. Creates a server socket runs itself in a new Thread
- * and notifies the background service.
- */
- public boolean start() {
- try {
- server = new MyServerSocketFactory().createServerSocket(port);
- if (server == null)
- return false;
- if (protocol.toString().equals("SMB")) {
- ((SMB) protocol).setIP(HelperUtils.inetAddressToString(Hostage.getContext()
- .getSharedPreferences(
- Hostage.getContext().getString(R.string.connection_info),
- Hostage.MODE_PRIVATE)
- .getInt(Hostage.getContext()
- .getString(R.string.connection_info_internal_ip), 0)));
- }
- (this.thread = new Thread(this)).start();
- running = true;
- service.notifyUI(this.getClass().getName(),
- new String[] { service.getString(R.string.broadcast_started), protocol.toString(), Integer.toString(port) });
- return true;
- } catch (IOException e) {
- return false;
- }
- }
- /**
- * Stops the listener. Closes the server socket, interrupts the Thread its
- * running in and notifies the background service.
- */
- public void stop() {
- try {
- server.close();
- thread.interrupt();
- running = false;
- service.notifyUI(this.getClass().getName(),
- new String[] { service.getString(R.string.broadcast_stopped), protocol.toString(), Integer.toString(port) });
- } catch (IOException e) {
- }
- }
- /**
- * Waits for an incoming connection, accepts it and starts a {@link Handler}
- */
- private void addHandler() {
- if (conReg.isConnectionFree()) {
- try {
- final Socket client = server.accept();
- new Thread( new Runnable() {
- @Override
- public void run() {
- try {
- String ip = client.getInetAddress().getHostAddress();
- if (ConnectionGuard.registerConnection(port, ip)){
- return;
- }
- Log.i("sda", "pause");
- Thread.sleep(999);
- if(ConnectionGuard.detectedPortscan(port, ip)){
- logPortscan(client, System.currentTimeMillis());
- }else{
- if (protocol.isSecure()) {
- startSecureHandler(client);
- } else {
- startHandler(client);
- }
- conReg.newOpenConnection();
- }
-
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }).start();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
- /**
- * Creates a new instance of an {@link Handler}.
- *
- * @param service
- * The background service
- * @param listener
- * The listener that created the handler
- * @param protocol
- * The Protocol the handler will run on
- * @param client
- * The Socket the handler uses
- * @return A Instance of a {@link Handler} with the specified parameter.
- */
- private Handler newInstance(Hostage service, Listener listener, Protocol protocol, Socket client) {
- return new Handler(service, listener, protocol, client);
- }
- /**
- * Starts a {@link Handler} with the given socket.
- *
- * @param client
- * The socket with the accepted connection.
- * @throws Exception
- */
- private void startHandler(Socket client) throws Exception {
- handlers.add(newInstance(service, this, protocol.getClass().newInstance(), client));
- }
- /**
- * Creates a SSLSocket out of the given socket and starts a {@link Handler}.
- *
- * @param client
- * The socket with the accepted connection.
- * @throws Exception
- */
- private void startSecureHandler(Socket client) throws Exception {
- SSLContext sslContext = ((SSLProtocol) protocol).getSSLContext();
- SSLSocketFactory factory = sslContext.getSocketFactory();
- SSLSocket sslClient = (SSLSocket) factory.createSocket(client, null, client.getPort(), false);
- sslClient.setUseClientMode(false);
- handlers.add(newInstance(service, this, protocol.getClass().newInstance(), sslClient));
- }
-
- /**
- * Logs a port scan attack
- * @param client The socket on which a port scan has been detected.
- * @param timestamp Timestamp when the portscan has been detected.
- */
- private void logPortscan(Socket client, long timestamp){
- SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(service);
- SharedPreferences connInfo = service.getSharedPreferences(service.getString(R.string.connection_info), Context.MODE_PRIVATE);
-
- AttackRecord attackRecord = new AttackRecord(true);
- attackRecord.setProtocol("PORTSCAN");
- attackRecord.setExternalIP(connInfo.getString(service.getString(R.string.connection_info_external_ip), null));
- attackRecord.setLocalIP(client.getLocalAddress().getHostAddress());
- attackRecord.setLocalPort(0);
- attackRecord.setRemoteIP(client.getInetAddress().getHostAddress());
- attackRecord.setRemotePort(client.getPort());
- attackRecord.setBssid(connInfo.getString(service.getString(R.string.connection_info_bssid), null));
-
- NetworkRecord networkRecord = new NetworkRecord();
- networkRecord.setBssid(connInfo.getString(service.getString(R.string.connection_info_bssid), null));
- networkRecord.setSsid(connInfo.getString(service.getString(R.string.connection_info_ssid), null));
- if (MyLocationManager.getNewestLocation() != null) {
- networkRecord.setLatitude(MyLocationManager.getNewestLocation().getLatitude());
- networkRecord.setLongitude(MyLocationManager.getNewestLocation().getLongitude());
- networkRecord.setAccuracy(MyLocationManager.getNewestLocation().getAccuracy());
- networkRecord.setTimestampLocation(MyLocationManager.getNewestLocation().getTime());
- } else {
- networkRecord.setLatitude(0.0);
- networkRecord.setLongitude(0.0);
- networkRecord.setAccuracy(Float.MAX_VALUE);
- networkRecord.setTimestampLocation(0);
- }
- Logger.logPortscan(Hostage.getContext(), attackRecord, networkRecord, timestamp);
- }
- }
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