Upstream on libnet was dead. Debian and Fedora had unmerged patches. I had patches to ip_offset handling (used for IP checksumming) to fix memory corruption bugs, and I had the start of Lua bindings. I forked from packetfactory.net and am maintaining and rereleasing libnet. Contact Sam Roberts <vieuxtech@gmail.com> if you have bugs or patches to contribute. Newest code is at: http://github.com/sam-github/libnet Releases are at: http://sourceforge.net/projects/libnet-dev/