Jacek's Status Report #5 of 13

[Jacek Wielemborek <d33tah () gmail com>]

Hello,

This is my report for week 5 of "Nsock-based port scanning" 
Google Summer of Code project. 

Accomplishments:

* Made my regression testing program re-build the relevant SVN 
branches at each test,
* Renamed -sD to -sT in my nmap-nsock-scan branch,
* Read a few chapters of the "TCP/IP Guide" book related to TCP 
congestion handling algorithms,
* Re-read RFC 2851,
* Had a meeting with my mentor,

* Experimented with a VM-based regression testing environment 
which can be later used to trigger TCP congestion conditions. 

At the moment, the VM setup consists of two Debian machines run 
by Qemu using -net socket (VLANs emulated in userspace) and a 
Scapy script that blocks all input from a given IP to prevent the 
kernel from responding with RSTs and SYN+ACKs every incoming SYN 
packet.

Priorities:

* Try to match the formulas from RFC on TCP Congestion Control to 
Nmap's source code, identify the relevant variables and observe 
Nmap's CC scheme,
* Implement probe retransmissions for the timed out connect() 
attempts,
* Implement probe canaries and use them to detect drops.

Yours,
Jacek Wielemborek

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