assocreq	wlan.fc.type_subtype == 0
assoreq	wlan.fc.type_subtype == 0
assocresp	wlan.fc.type_subtype == 1
assoresp	wlan.fc.type_subtype == 1
assocreassocreq	(wlan.fc.type_subtype == 0 or wlan.fc.type_subtype == 2)
assocreassocresp	(wlan.fc.type_subtype == 1 or wlan.fc.type_subtype == 3)
probereq	wlan.fc.type_subtype == 4
proberesp	wlan.fc.type_subtype == 5
beacon	wlan.fc.type_subtype == 8
QoSNULL	wlan.fc.type_subtype == 0x2c
qosdata	wlan.fc.type_subtype == 0x28