What are the different wireless filter expressions ?
The Wireshark display filter reference lists wlan (general 802.11), wlan_mgmt (802.11 management), wlancap (AVS capture header), wlancertextn (802.11 certificate extensions), and radiotap (radiotap header) (Ethereal Wireless Filters from www.remote-exploit.org) See the previous item for detailed instructions on using Wireshark.