This is a Google Summer of Code project.

WHAT

A multi-platform TCP/IP v4 Stack Testing Tool,

As a testing tool, it can perform regression, protocol conformance, and fuzz tests. The tool may also be employed as an aid to protocol developers and both testing and debugging of firewalls/routers.

USING

It's built on top of PCS(Packet Construction Set)

"PCS is a set of Python modules and objects that make building network protocol code easier for the protocol developer. The core of the system is the pcs module itself which provides the necessary functionality to create classes that implement packets." http://pcs.sourceforge.net/

PCS enables testing at OSI layers 3, 4, and 5.

HOW

Tcptest mainly is a python module and one script for each test covered (more then one per script often) The module count with methods acting as fasteners, doing things like (a)three way handshake, (b)active/passive close and (c)several createXX and assertXX, where XX=(ip, tcp, rst, urg, fin, syn, psh, so on...) As the tests are being created, the number of 'fasteners' are growing, turning each moment easier to create new tests.

PHILOSOPHY

Use of small tests. So we can cover a wide range of traffics, events and transitions predetermined separately.

The development would be like a protocol, but without covering all possible events and transitions, only traffic previously determined.

Instead of targeting a TCP Finite State Machine (FSM) like the implementation of TCP/IP protocols, the development will be based towards flow of packets, where traffic is composed of packets that are sent and received in a previously registered way.

THE FOLLOWING TESTS WILL BE INITIALLY COVERED

1. Three-way handshake
2. Reset from closed state
3. Reset from non syncronized state
4. Reset from syncronized state
5. Sliding Window Protocol
6. Urgent Pointer
7. TCP Options establishment
8. Selective Acknowledgments
9. TCP Timestamps
10. Time-wait configuration
11. Connection close
12. Simultaneous close
13. Receive Window Size Advertisement
14. Transmit Window Size Advertisement
15. Support Partner’s Shrinking Window
16. Silly Window Syndrome Avoidance
17. Zero Window Handling
18. Receive ACKs, RSTs, and URGs while Window is Zero
19. Zero window Probing

MENTOR

• George Neville-Neil

STUDENT

• Victor Hugo Bilouro