2. W3car project Emmanuel Castellani Laurent Marchese Nicolas Pastorelly Wolfgang Kieß Johannes Walch Claudia Schremmer Teleseminar Nice-Mannheim Year 2001-2002

3. 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration Overview

4. W3car Castellani – Marchese – Kiess - Walch Big Picture 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration  DCX Speed3 Project  Prototype of UMTS car on Monaco Telecom network  Emphasis on bandwidth-consuming type of 3G services  DCX, Sun, Jentro, Siemens, MDBS joint venture

5. W3car Castellani – Marchese – Kiess - Walch W3Car Services 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration

6. W3car Castellani – Marchese – Kiess - Walch Initial Specification 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration  Emergency service for UMTS car  Using audio and video communication  SUN-Jentro Platform for InCar Computer not ready  Speed3 Project not started yet  Very complex and proprietary technologies

7. W3car Castellani – Marchese – Kiess - Walch Actual Specification 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration  New focus : Architecture prototyping instead of Features Delivery  Entertainment(Backseat) Applications  Java Client Prototype for IPAQ/mobile network device

8. W3car Castellani – Marchese – Kiess - Walch Important Technology 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration Technologies/Features proposed :  Java  XML-RPC / SOAP based communications  Integrated web browser  Download Java(jar-file) Entertainment Applications to IPAQ

9. W3car Castellani – Marchese – Kiess - Walch Application Overview 1 General information 1.1 Big Picture 1.2 Initial Spec 1.3 Actual Spec 2 Technical informations 3 Demonstration

10. W3car Castellani – Marchese – Kiess - Walch Server 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

11. W3car Castellani – Marchese – Kiess - Walch Server 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  DBMS (MySql)  Web Server (Servlets, JSP) Dynamic Contains references of games JSP : dynamic Web Page showing games Servlet : producing messages  Multiple Game servers

12. W3car Castellani – Marchese – Kiess - Walch Server 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration DBMS Games Server Architecture Games Server Web Server JSP Servlets...

13. W3car Castellani – Marchese – Kiess - Walch Games Development 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

14. W3car Castellani – Marchese – Kiess - Walch Games Development 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Anybody could develop games  Need to standardize the games Games must extends an abstract class and redifined start() and stop() methods =>To cast objects downloaded into Games like Plugins system

15. W3car Castellani – Marchese – Kiess - Walch Browser 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration 1- IceBrowser (bean)  Complete Web browser  Problems : Conflict with our ClassLoader No compatibility with IPAQ 2- Simple java files using swing API  No ClassLoader, no security manager... Two possibilities :

16. W3car Castellani – Marchese – Kiess - Walch ClassLoader 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

17. W3car Castellani – Marchese – Kiess - Walch ClassLoader 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration To download and instantiate jarFile via HTTP First version:  Used JarURLConnection to download the game directly in the virtual machine  Problem with the jdk1.1.8 Second version:  Used simple URLConnection  The jarFile is written to the fileSystem

18. W3car Castellani – Marchese – Kiess - Walch ClassLoader 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

19. W3car Castellani – Marchese – Kiess - Walch Communication 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

20. W3car Castellani – Marchese – Kiess - Walch Communication 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration SOAP :  Complex protocol  SOAP-Server on IPAQ ? => limited Resources  Extensible architecture for future integration We wanted to have a flexible, easy to use protocol which can easily be debugged (and simulated manually) => XML

21. W3car Castellani – Marchese – Kiess - Walch JAXB messaging 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  JAXB = Java XML Binding  In our case marshal (serialize to XML) the Message and transmit it as String  Receiver unmarshals the XML String to a Message  Marshaling/Unmarshaling framework is generated with a tool (castor)  Grammar (w3c schema ) Class (Java)  XML-Document Object Instance

22. W3car Castellani – Marchese – Kiess - Walch Communication 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Message objects with set and get methods  Call the send(Message m) Method  Message is transformed into XML, send as a String and the object reconstructed on the receiving side. Message Object Message Service Sender

23. W3car Castellani – Marchese – Kiess - Walch Krypto Package 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration

24. W3car Castellani – Marchese – Kiess - Walch Krypto Package 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration Motivation  Download an application and execute it risk of malicious code security problem Solution  Trusted party signs the jar file using asymmetric cryptography  Before loading, verify the signature

25. W3car Castellani – Marchese – Kiess - Walch How it works 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Generate a key pair with the JAVA keytool  Sign the file with the W3carSigner  On each request for a game, the Signature is transmitted with the other information via the MessageService  The client uses the signature to verify the file before executing the game

26. W3car Castellani – Marchese – Kiess - Walch Implementation 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Java.security package contains all necessary classes  … the package is not supported by the JVM on the IPAQ the signature mechanism is disabled on the IPAQ, but will be demonstrated on a laptop.

27. W3car Castellani – Marchese – Kiess - Walch Ipaq & Java 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Insignia Jeode JRE Conflict with our ClassLoader Java 1.1 compatible including java.security Commercial package  Sun Personal Java JRE Java 1.1 compatible without java.security  Other OS than Windows CE 3.0 Linux Java OS

28. W3car Castellani – Marchese – Kiess - Walch Evaluation of JRE 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration Problem : Browser we choose needs swing Solution : Porting swing to IPAQ using jar file  Swing is only lightweight implementation on top of AWT  did not work with Jeode PersonalJava JRE of Choice : Personal Java

29. W3car Castellani – Marchese – Kiess - Walch Java on IPAQ 1 General information 2 Technical informations 2.1 Server 2.2 Games 2.3 Browser 2.4 ClassLoader 2.5 Communication 2.6 Krypto Package 2.7 IPAQ & Java 3 Demonstration  Java is very slow on IPAQ due to limited resources  Developing on a limited device is difficult, testing takes a lot of time  Better environment : a specialized Java OS or compiled binaries

30. Demonstration

31. Conclusion The goal of the project was reached. Work Experience : Similiar to an industrial project  Investigation on the best technologies, no exact specification  Short time for delivery (Specification and Implementation done at the same time) Personal Experience  We got used to video conference and foreign languages  In the end it was a lot of fun...