WifiScanner is an analyser/detector of 802.11b stations and access points. It can listen alternatively on all the 14 channels, and write packet information in real time.
It can search access points and associated client stations, and generate a graphic of the architecture using GraphViz. All network traffic can be saved in the libpcap format for post analysis.
WifiScanner changes periodically the channel and tries to find received frames on every channel, and then displays them.
Works with Linux with a 802.11b card having a PrismII component , and a Linux-Wlan driver.