pbscan | efficient stateless SYN scanner and banner grabber | Security library

pbscan is a C library typically used in Security applications. pbscan has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

polarbearscan is an attempt to do faster and more efficient banner grabbing and port scanning. it combines two different ideas which hopefully will make it somewhat worthy of your attention and time. the first of these ideas is to use stateless syn scanning using cryptographically protected cookies to parse incoming acknowledgements. to the best of the author's knowledge this technique was pioneered by dan kaminsky in scanrand. scanrand was itself part of paketto keiretsu, a collection of scanning utilities, and it was released somewhere in 2001-2002. a mirror of this code can be found at packet storm [1]. the second idea is use a patched userland tcp/ip stack such that the scanner can restore state immediately upon receiving a cryptographically verified packet with both the syn and ack flags set. the userland stack being used here by polarbearscan is called libuinet [2]. unlike some of the other userland tcp/ip stacks out there this one is very mature as it's simply a port of freebsd's tcp/ip stack. by patching the libuinet stack one can then construct a socket and complete the standard tcp 3-way handshake by replying with a proper ack. doing it this way a fully functional tcp connection is immediately