ENet
From GDWiki
eNet is a thin, low-level, cross-platform, UDP-based networking library.
[edit] NOTE
A presumed major security hole regarding eNet is described at: http://www.security.nnov.ru/Fnews887.html
Lee Salzman, the developer of eNet, regarding this issue:
That was just some random script kiddie looking to make a name for himself by going around and finding buffer overflows in whatever irrelevant projects he can prey upon.
But, to answer your question: is ENet bullet-proof? No. Obvious exploits have been fixed, but I'm sure if you went over it in fine detail you could still find something to exploit. I don't think there's a networking library where that's not the case, just that they have obscurity working on their side. The only reason I guess it matters in ENet is because the source is available, so you lose the obscurity angle. But there are always simple ways to DoS something without having intricate knowledge of the code. [continued]
http://lists.puremagic.com/pipermail/enet-discuss/2006-August/000625.html
