public void handlePacket(Packet p1, IoSession session) throws Exception { Player player = (Player) session.getAttachment(); final String ip = ((InetSocketAddress) session.getRemoteAddress()) .getAddress() .toString() .replaceAll("/", ""); byte loginCode; try { byte[] data = RSA.decrypt(p1.getData()); Packet p = new Packet(session, data); boolean reconnecting = (p.readByte() == 1); int clientVersion = p.readInt(); if (Config.SERVER_VERSION != clientVersion) { Logger.println( "ip: " + ip + " | clientversion: " + clientVersion + " : " + Config.SERVER_VERSION); } int[] sessionKeys = new int[4]; for (int key = 0; key < sessionKeys.length; key++) { sessionKeys[key] = p.readInt(); } String username = ""; String password = ""; username = p.readString(20).trim(); password = p.readString(20).trim(); if (world.countPlayers() >= Config.MAX_PLAYERS) { loginCode = 10; } else if (clientVersion < Config.SERVER_VERSION) { loginCode = 4; } else if (!player.setSessionKeys(sessionKeys)) { loginCode = 5; } else { player.load(username, password, 0, reconnecting); if (clientVersion < 39) { player.clientWarn(true); } return; } } catch (Exception e) { System.err.println("Login exception with: " + ip); e.printStackTrace(); loginCode = 4; } RSCPacketBuilder pb = new RSCPacketBuilder(); pb.setBare(true); pb.addByte((byte) loginCode); session.write(pb.toPacket()); player.destroy(true); }