BSDCan2009 - Final Release
BSDCan 2009
The Technical BSD Conference
| Speakers | |
|---|---|
|
Mike Silbersack |
| Schedule | |
|---|---|
| Day | Talks - 1 - 2009-05-08 |
| Room | MNT 207 |
| Start time | 16:00 |
| Duration | 01:00 |
| Info | |
| ID | 120 |
| Event type | Lecture |
| Track | Hacking |
| Language used for presentation | English |
Detecting TCP regressions with tcpdiff
Determining if a TCP stack is working correctly is hard. The tcpdiff project aims for a simpler goal: To automatically detect differences in TCP behavior between different versions of an operating system and display those differences in an easy to understand format. The value judgement of whether a certain change between version X and Y of a TCP stack is good or bad will be left to human eyes.
Determining if a TCP stack is working correctly is hard. The tcpdiff project aims for a simpler goal: To automatically detect differences in TCP behavior between different versions of an operating system and display those differences in an easy to understand format. The value judgement of whether a certain change between version X and Y of a TCP stack is good or bad will be left to human eyes.
The initial version of tcpdiff presented at NYCBSDCon 2008 demonstrated that it could be used to detect at least two major TCP bugs that were introduced into FreeBSD in the past few years. The work from that presentation can be viewed at http://www.silby.com/nycbsdcon08/.
For BSDCan 2009, I hope to fix a number of bugs in tcpdiff, make it easier to use, set up nightly tests of FreeBSD, and improve it so that additional known bugs can be detected. Additionally, I plan to run it on OSes other than FreeBSD.