Access Point Utilities for Unix is a set of utilities that configure and monitor a Wireless Access Point under Unix. It is known to compile (with GCC and the IBM C compiler) and run under Linux, FreeBSD, OpenBSD, MacOS X, AIX, and QNX.
You can download it from the following link: https://packetstormsecurity.com/files/download/36593/ap-utils-1.5.tar.bz2
Source: https://packetstormsecurity.com/files/36593/ap-utils-1.5.tar.bz2.html