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Dynamic Aspect C++ Compiler for Inter Hosts/Applications Aspects

Dynamic Aspect C++ Compiler for Inter Hosts/Applications Aspects. By Sufyan Almajali Advisor Prof. Tzilla Elrad. What We Want to Enable. Dynamic Network Security Policy Dynamic WLAN Accounting Policy

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Dynamic Aspect C++ Compiler for Inter Hosts/Applications Aspects

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  1. Dynamic Aspect C++ Compiler for Inter Hosts/Applications Aspects By Sufyan Almajali Advisor Prof. Tzilla Elrad

  2. What We Want to Enable • Dynamic Network Security Policy • Dynamic WLAN Accounting Policy • Network applications are only one possible application that can benefit from our extended language. Others could be standalone applications ,peer-to-peer applications, and distributed applications.

  3. Dynamic Network Security Policy

  4. Policy 1: All For all network users, each of the applications start event is logged for auditing purposes users should Policy 2: Sales users should access the network from their own PCs only Policy 3: HR application events (add new employee record), need to be audited along with HR user information

  5. Dynamic WLAN Accounting Policy • Users use different network applications ( services) : Internet Browsing, Network Printing, File service, ..etc. • Charges for the different services should be dynamically controlled.

  6. Challenges • To provide a simple mechanisms to localize a concern across entire network. • To provide a complete dynamic infrastructure ( software and network protocols) at both the application and network levels.

  7. Goals • To design a software system that supports organizational policy changes across a network. • To design a programming language that supports the development of dynamic networks applications and services. • To automate network administration process

  8. AOSD • Using AOSD allows localizing the representation of concerns in modular units. • AOSD Joinpoint model is not network aware. • Joinpoints are only within the same program applications  Pointcut expressions are restricted within application.

  9. Our Approach • Implement a Dynamic AOSD language at the application level  Dynamic Aspect C++ ( DAC++) • Expand the joinpoint model toward networks • Implement a Dynamic AOSD language at the network level(Network Dynamic Aspect C++) NDAC++

  10. DAC++ • Allows Efficient Dynamic Weaving for C++ • The compiler backend has been redesigned to support Meta object data at runtime. • Meta Object data includes • Classes objects information, • Aspect information, and • runtime linking information.

  11. DAC++ v2

  12. New C++ Compiler backend

  13. NDAC++ v3 • Extends the jointpoint model to support pointcut expressions over network. • Supports dynamic network weaving at the network level.

  14. NDAC++ Jointpoint Dimensions • Network • Application (process) • Thread • Class • Instance • Method ( member function) • Variable • Cancel this page

  15. NDAC++ Syntax • Security Policy Example

  16. Defining Join Points and Pointcut Designator • NetworkPC net_pc1(SUBNET,"192.168.64.0/26"); • ApplicationPC app_pc1(ALL,""); • ThreadPC thr_pc1(ALL,””);

  17. Pointcut Definition Examples. 1 NetworkPC net_pc1(BROADCAST,""); 2 NetworkPC net_pc2(SUBNET,"192.168.64.0/26"); 3 NetworkPC net_pc3(HGROUP, "192.168.64.0-63, 192.168.64.128-191"); 4 NetworkPC net_pc4(SUBNET,"192.168.64.64/26"); 5 ApplicationPC app_pc1(ALL,""); 6 ApplicationPC app_pc2(ALL,""); 7 ApplicationPC app_pc3( GROUP, "Salesapp , Adminapp"); 8 ApplicationPC app_pc4(NAMEMATCH,"HRapp"); 9 ClassPC class_pc1(GROUP,”square,rectangle”); 10 MethodPC meth_pc1(GROUP, "add_emp, modify_emp,delete_emp");

  18. Defining Sub-Pointcut Designator and Pointcut Designator over Multi-dimensional Join Point Space 1 SPCD spcd1, spcd2; 2 spcd1.setnetworkpc(net_pc1); 3 spcd1.setapplicationpc(app_pc1); 4 spcd2.setnetworkpc(net_pc1); 5 spcd2.setapplicationpc(app_pc2); 6 spcd2.setmethodpc(meth_pc1); 7 PCD pc1; 8 pc1.add(spcd1); 9 pc1.add(spcd2);

  19. 1 class LoggingPolicy: public Aspect { 2 LoggingPolicy(); 3 Advice() { // code to log user info} 4 ..... // here, programmer can define other member variables and functions 5 } 6 class CheckSalesUsersPolic: public Aspect { 7 CheckSalesUsersPolicy(); 8 Advice() { // code to get user name first, get // machine's mac address next, send to // server for validity and authorize } 9 int main () { 10 WeaveSpecs w1; 11 w1.setweavetarget(Application_W); 12 w1.setweavetype(Start_T); 13 NetworkPC net_pc1(BROADCAST,""); 14 NetworkPC net_pc2(SUBNET,"192.168.64.0/26"); 15 ApplicationPC app_pc1(ALL,"");

  20. 16 SPCD spcd1, spcd2; 17 spcd1.setnetworkpc(net_pc1); 18 spcd1.setapplicationpc(app_pc1); 19 spcd2.setnetworkpc(net_pc1); 20 spcd2.setapplicationpc(app_pc2); 21 PCD pc1,pc2; 22 pc1.add(spcd1); 23 pc2.add(spcd2); 24 LoggingPolicy aspect1; 25 aspect1.setweavespecs(w1); 26 aspect1.setpcd(pc1); 27 CheckSalesUsersPolicy aspect2; 28 aspect2.setweavspecs(w1); 29 aspect2.setpcd(pc2);

  21. Network Weaving Level

  22. Network Weaving Level • IPC over TCP ( Interprocess communication) • Network Weaving Protocol

  23. Questions • ???

  24. Contact Info: • Prof. Tzilla Elrad email: elrad@iit.edu • Sufyan Almajali email: almasuf@iit.edu

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