Netsed, the network packet stream editor, is a program originally written by Michal Zalewski
While the program idea is good, it’s implementation had some lack, and nobody seamed to care enough to fix it.
I did already hack it some years ago, and it appeared that my changes was fixing a debian RC bug (#586037) so I took netsed maintenance as one of my new projects!
For now only my changes and patches proposed by Mats Erik Andersson are integrated.
But I will start working on a test suite (still have to find the right tools for that, would ruby be nice ?), and of course implement UDP support.
Also I’d like to really thank Mats Erik Andersson and Tim Retout for their answers and support.