Banner scanning utility that generates random IP addresses, can search for specified strings, and has a default list of ports to scan if not given a list. Works extremely streamlined as it spawns sixteen children processes.
You can download it from the following link: https://packetstormsecurity.com/files/download/31559/banscan.c
Source: https://packetstormsecurity.com/files/31559/banscan.c.html