/**
   * Main Method
   *
   * @param args command line arguments
   */
  public static void main(String[] args) {
    // init logging
    try {
      Logging.init("lucane.log", "ALL");
    } catch (IOException ioe) {
      System.err.println("Unable to init logging, exiting.");
      System.exit(1);
    }

    Server server = null;
    ServerConfig config = null;

    try {
      config = new ServerConfig(CONFIG_FILE);
    } catch (Exception e) {
      Logging.getLogger().severe("Unable to read or parse the config file.");
      e.printStackTrace();
      System.exit(1);
    }

    // Server creation
    server = new Server(config);
    server.generateKeys();
    Logging.getLogger().info("Server is ready.");
    server.run();
  }
  /**
   * Creates a new Server object.
   *
   * @param sqlDriver JDBC driver
   * @param dbURL JDBC connection url
   * @param dbLogin database login
   * @param dbPasswd database password
   */
  private Server(ServerConfig config) {
    Server.instance = this;
    this.connections = new ArrayList();
    this.services = new ArrayList();
    this.port = config.getPort();
    this.socket = null;
    this.dbLayer = null;

    try {
      dbLayer = DatabaseAbstractionLayer.createLayer(config);
      Logging.getLogger().finer("dbLayer   : " + dbLayer);

      this.store = new Store(config);
    } catch (Exception ex) {
      Logging.getLogger().severe("#Err > Unable to connect to the database : " + ex.getMessage());
      ex.printStackTrace();
      System.exit(1);
    }

    try {
      this.serverIp = InetAddress.getLocalHost().getHostAddress();
      this.socket = new ServerSocket(this.port);
    } catch (IOException e) {
      Logging.getLogger().severe("#Err > Unable to listen on the port " + port + ".");
      e.printStackTrace();
      System.exit(1);
    }

    loadInternalServices();
  }
  /** Generates server's keys for signature */
  public void generateKeys() {
    Logging.getLogger().info("Generating keypair");

    try {
      String[] pair = KeyGenerator.generateKeyPair();
      myConnectInfo =
          new ConnectInfo("server", this.serverIp, this.serverIp, this.port, pair[1], "Server");
      this.connections.add(myConnectInfo);
      this.signer = new Signer(pair[0]);
    } catch (SignatureException e) {
      Logging.getLogger().severe("Unable to generate keypair : " + e);
      System.exit(1);
    }
  }
  /**
   * Constructor
   *
   * @param filename the XML config file
   */
  public LdapConfig(String filename) throws Exception {
    DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = builder.parse(filename);

    // -- root element
    Node node = document.getFirstChild();
    while (node != null && node.getNodeType() != Node.ELEMENT_NODE) node = node.getNextSibling();

    if (node == null || !node.getNodeName().equals("ldap"))
      throw new Exception("root element is different from 'ldap'");

    this.ldapUrl = node.getAttributes().getNamedItem("url").getNodeValue();

    node = node.getFirstChild();
    while (node != null) {
      if (node.getNodeType() == Node.ELEMENT_NODE) {
        if (node.getNodeName().equals("authentication")) handleAuthentication(node);
        else if (node.getNodeName().equals("plugins")) handlePlugins(node);
        else if (node.getNodeName().equals("services")) handleServices(node);
        else if (node.getNodeName().equals("users")) handleUsers(node);
        else if (node.getNodeName().equals("groups")) handleGroups(node);
        else Logging.getLogger().warning("unexepected node : " + node.getNodeName());
      }
      node = node.getNextSibling();
    }
  }
  /** Accepts connections */
  public void run() {
    Socket client = null;

    try {
      client = socket.accept();
      new Thread(this).start();
      getMessage(client);
    } catch (IOException ex) {
      Logging.getLogger().warning("#Err > Unable to accept connections.");
    }

    try {
      client.close();
    } catch (Exception ex) {
      Logging.getLogger().warning("#Err > Socket::close()");
    }
  }
  /** Send the user list to all users */
  public void sendUserList() {
    String data = "";
    Socket sock = null;
    ObjectConnection oc = null;
    byte[] signature = {};

    /* receiver list */
    for (int i = 0; i < this.connections.size(); i++) {
      if (((ConnectInfo) this.connections.get(i)).type.equalsIgnoreCase("Client")) {
        data = "";

        /* users list */
        for (int j = 0; j < this.connections.size(); j++) {
          if (((ConnectInfo) this.connections.get(j)).type.equalsIgnoreCase("Client"))
            data = data + " " + ((ConnectInfo) this.connections.get(j)).getName();
        }

        try {
          sock =
              new Socket(
                  ((ConnectInfo) this.connections.get(i)).hostname,
                  ((ConnectInfo) this.connections.get(i)).port);
          oc = new ObjectConnection(sock);
          Message msg =
              new Message(
                  myConnectInfo,
                  (ConnectInfo) this.connections.get(i),
                  "Client",
                  "USER_LIST " + data);

          try {
            signature = this.signer.sign(msg);
          } catch (SignatureException e) {
            Logging.getLogger().warning("Unable to sign: " + e);
          }

          oc.write(msg);
          oc.write(signature);
          oc.close();
        } catch (IOException ex) {
          Logging.getLogger().warning("Unable to connect to host");
          continue;
        }
      }
    }
  }
  /** Loads internal services */
  private void loadInternalServices() {
    try {
      Iterator services;
      String servicename;
      String baseURL = System.getProperty("user.dir") + "/" + APPLICATIONS_DIRECTORY;

      LucaneClassLoader loader = LucaneClassLoader.getInstance();
      services = store.getServiceStore().getAllServices();

      while (services.hasNext()) {
        ServiceConcept service = (ServiceConcept) services.next();
        servicename = service.getName();
        try {
          loader.addUrl(new URL("jar:file:///" + baseURL + servicename + ".jar!/"));
          String className =
              (new JarFile(baseURL + servicename + ".jar"))
                  .getManifest()
                  .getMainAttributes()
                  .getValue("Service-Class");

          if (className == null) continue;

          Service serv = (Service) Class.forName(className, true, loader).newInstance();
          this.services.add(serv);
          serv.init(this);

          if (!service.isInstalled()) {
            serv.install();
            service.setInstalled();
            store.getServiceStore().updateService(service);
          }

          Logging.getLogger().info("Service '" + servicename + "' loaded.");
          this.connections.add(
              new ConnectInfo(servicename, serverIp, serverIp, port, "nokey", "service"));
        } catch (Exception e) {
          Logging.getLogger().warning("Unable to load service '" + servicename);
        }
      }
    } catch (Exception e) {
      Logging.getLogger().warning("Unable to load internal services : " + e);
      e.printStackTrace();
    }
  }
  /**
   * Parse groups node
   *
   * @param node the groups node
   */
  private void handleGroups(Node node) {
    this.groupsDn = node.getAttributes().getNamedItem("dn").getNodeValue();

    node = node.getFirstChild();
    while (node != null) {
      if (node.getNodeType() == Node.ELEMENT_NODE) {
        if (node.getNodeName().equals("attribute")) handleMapping(this.groupsAttributes, node);
        else if (node.getNodeName().equals("mapping")) handleMapping(this.groupsMapping, node);
        else Logging.getLogger().warning("unexepected node : " + node.getNodeName());
      }
      node = node.getNextSibling();
    }
  }
  /** Show a dialog asking for the friend name */
  public void start() {
    if (this.trayIcon == null) {
      // no user message if we aren't on windows
      if (System.getProperty("os.name").startsWith("Win")) DialogBox.error(tr("err.noTray"));
      else Logging.getLogger().info("Not on windows, running MainInterface instead of QuickLaunch");

      PluginManager.getInstance().run(MAIN_INTERFACE, new ConnectInfo[0]);
      Client.getInstance().setStartupPlugin(MAIN_INTERFACE);
      return;
    }

    addMenuToTray();

    this.trayIcon.addMouseListener(this);
    this.trayIcon.setVisible(true);
    this.trayIcon.showInfo(tr("lucane.is.ready"), "Lucane Groupware");
  }
  /**
   * Send a message through the network
   *
   * @param dest the receiver
   * @param app the application that need to process this message
   * @param data the data to send
   */
  public ObjectConnection sendMessageTo(ConnectInfo dest, String app, String data)
      throws IOException {
    Socket sock = new Socket(dest.hostname, dest.port);
    ObjectConnection oc = new ObjectConnection(sock);
    Message msg = new Message(myConnectInfo, dest, app, data);
    byte[] signature = null;

    try {
      signature = this.signer.sign(msg);
    } catch (SignatureException e) {
      Logging.getLogger().warning("Unable to sign: " + e);
    }

    oc.write(msg);
    oc.write(signature);
    return oc;
  }
 /**
  * Send a plugin JAR file to the client
  *
  * @param data the plugin name
  */
 private void sendPlugin(ObjectConnection oc, String data) {
   DataInputStream dis = null;
   try {
     dis = new DataInputStream(new FileInputStream(APPLICATIONS_DIRECTORY + data + ".jar"));
     byte[] buf = new byte[dis.available()];
     dis.readFully(buf);
     oc.write(buf);
   } catch (Exception e) {
     Logging.getLogger().warning("Unable to send the file: " + data + ".jar");
   } finally {
     if (dis != null) {
       try {
         dis.close();
       } catch (IOException ioe) {
       }
     }
   }
 }
  /**
   * Send the plugin list to a client. The list depends of the client's groups
   *
   * @param source the user that asked this command
   */
  private void sendPluginList(ObjectConnection oc, String source) {
    Vector plist = new Vector();
    Iterator plugins;
    String line = "";

    try {
      UserConcept user = store.getUserStore().getUser(source);
      plugins = store.getPluginStore().getAuthorizedPlugins(user);

      while (plugins.hasNext()) {
        PluginConcept plugin = (PluginConcept) plugins.next();
        line = plugin.getName();
        line += " " + plugin.getVersion();
        plist.add(line);
      }
      oc.write(plist);
    } catch (Exception e) {
      Logging.getLogger().warning("Unable to send the plugin list.");
      e.printStackTrace();
    }
  }
 private void cleanExit() {
   Logging.getLogger().finer("QuickLaunch::cleanExit()");
   this.trayIcon.setVisible(false);
   exit();
 }
  /**
   * Authenticate users
   *
   * @param oc the streams
   * @param ci the ConnectInfo
   */
  private void authentification(ObjectConnection oc, Message message, String data) {
    String passwd = null;
    String name = null;
    String authenticationServer = null;
    String hostname = null;
    int port = 0;
    StringTokenizer stk = new StringTokenizer(data, " ");

    try {
      passwd = stk.nextToken();
      hostname = stk.nextToken();
      port = Integer.parseInt(stk.nextToken());
    } catch (Exception ex) {
      Logging.getLogger().warning("#Err > Incorrect authentication message.");
      try {
        oc.write("BAD_MESSAGE");
      } catch (Exception e) {
      }

      return;
    }

    name = message.getSender().getName();
    authenticationServer = message.getSender().getAuthenticationServer();
    UserConcept user = null;

    try {
      user = store.getUserStore().getUser(message.getSender().getName());
    } catch (Exception e) {
      e.printStackTrace();
    }

    // password ok
    if (user != null && store.getUserStore().checkUserPassword(user, passwd)) {
      // disconnect already connected user
      if (isAlreadyKnown(message.getSender())) {
        ConnectInfo oldUser = getCompleteConnectInfo(message.getSender());
        try {
          ObjectConnection myoc = this.sendMessageTo(oldUser, "Client", "DISCONNECT");
          myoc.close();
        } catch (Exception e) {
          // we can't do much here, the client might have crashed
        }
        this.removeConnectInfo(oldUser);
      }

      connections.add(
          new ConnectInfo(
              name, authenticationServer, hostname, port, user.getPublicKey(), "Client"));
      try {
        oc.write("AUTH_ACCEPTED " + user.getPrivateKey());
      } catch (Exception e) {
        e.printStackTrace();
      }
      this.sendUserList();
    } else {
      try {
        oc.write("NOT_VALID_USER");
      } catch (Exception e) {
      }
    }
  }
  /**
   * Reads messages from the network. A message is either a command for the server or for an
   * internal Service.
   *
   * @param sock the Socket
   */
  private void getMessage(Socket sock) {
    int i;
    boolean alreadyConnected;
    boolean isAuthentication;

    Message message;
    byte[] signature;

    String cmd;
    String cmdData;
    StringTokenizer stk;

    ObjectConnection oc = null;

    try {
      /* streams initialization */
      oc = new ObjectConnection(sock);
      message = (Message) oc.read();
      signature = (byte[]) oc.read();
    } catch (Exception ex) {
      ex.printStackTrace();
      Logging.getLogger().warning("#Err > Unable to read message.");
      return;
    }

    // check wether a user is known or not
    alreadyConnected = isAlreadyKnown(message.getSender());

    // check if command is authentication
    isAuthentication =
        message.getApplication().equals("Server")
            && ((String) message.getData()).startsWith("AUTH");

    // signature check
    if (alreadyConnected && !isAuthentication) {
      boolean sigok = false;
      try {
        ConnectInfo ci = message.getSender();
        if (ci.verifier == null) ci = this.getCompleteConnectInfo(ci);
        sigok = ci.verifier.verify(message, signature);
      } catch (Exception e) {
        e.printStackTrace();
      }

      if (!sigok) {
        try {
          oc.write("FAILED bad signature");
        } catch (Exception e) {
        }
        Logging.getLogger().warning("#Err > bad signature: " + message.getSender());
        return;
      }
    }

    if (message.getApplication().equals("Server")) {
      cmd = null;

      try {
        stk = new StringTokenizer((String) message.getData());
        cmd = stk.nextToken();
        cmdData = stk.nextToken("\0").substring(1);
      } catch (Exception ex) {
        if (cmd == null) cmd = "";

        cmdData = "";
      }

      /* if the user asks for authentication, we try to do it and exits this method */
      if (cmd.equals("AUTH")) {
        try {
          oc.write("OK");
        } catch (Exception e) {
          e.printStackTrace();
        }

        authentification(oc, message, cmdData);
      } else if (!alreadyConnected) {
        Logging.getLogger().info("Access denied to " + message.getSender());
        try {
          oc.write("FAILED No Connection");
        } catch (Exception e) {
        }
      } else {
        internalCommand(oc, message, cmd, cmdData);
      }
    } else if (!alreadyConnected) {
      Logging.getLogger().info("Access denied to " + message.getSender());
      try {
        oc.write("FAILED No Connection");
      } catch (Exception e) {
      }
    } else {
      Service s;

      /* seek the destination service */
      boolean serviceFound = false;
      for (i = 0; i < this.services.size(); i++) {
        s = (Service) services.get(i);

        if (s.getName().equalsIgnoreCase(message.getApplication())) {
          serviceFound = true;
          UserConcept user = null;
          ServiceConcept service = null;
          try {
            user = store.getUserStore().getUser(message.getSender().getName());
            service = store.getServiceStore().getService(message.getReceiver().getName());
          } catch (Exception e) {
          }

          /* tests serviceManager for permissions */
          boolean isAutorizedService = false;
          try {
            isAutorizedService = store.getServiceStore().isAuthorizedService(user, service);
          } catch (Exception e) {
          }

          if (!isAutorizedService) {
            Logging.getLogger()
                .info(
                    "#Err > "
                        + message.getSender()
                        + " : Service denied to "
                        + message.getReceiver().getName());
            try {
              oc.write("FAILED You don't have acces to this service");
            } catch (Exception e) {
            }
          } else {
            try {
              oc.write("OK");
            } catch (Exception e) {
            }
            serviceFound = true;
            s.process(oc, message);
          }
          break;
        }
      }

      if (!serviceFound) {
        try {
          oc.write("FAILED unknown");
        } catch (Exception e) {
        }
        Logging.getLogger()
            .warning("#Err > Service " + message.getReceiver().getName() + " unknown");
      }
    }

    oc.close();
  }