Ruleset-retrieve obtains the newest Snort IDS ruleset from www.snort.org or whitehats.com and inserts your ip address into the appropriate areas.
You can download it from the following link: https://packetstormsecurity.com/files/download/23514/ruleset-retrieve.c
Source: https://packetstormsecurity.com/files/23514/ruleset-retrieve.c.html