ASEL is an 802.11n MIMO technique which is cheaper to implement compared with beamforming. Details of the technique can be found here: http://www.merl.com/publications/docs/TR2006-057.pdf I want to be able to see if units do indeed employ this feature. ASEL capability is defined in the "ASEL control field" of the "HT control field" in the MAC header The exact location of the frame is here: https://books.google.com/books?id=0GwFrd90G3kC&pg=PA413&lpg=PA413&dq=asel+802.11+ht+control+field&source=bl&ots=0SPEGKQcUz&sig=TNEWYeCGCQm617D4HfNijYQHiA4&hl=en&sa=X&ved=0CDIQ6AEwA2oVChMIypvdibbmxgIVEFGICh0JkA4z#v=onepage&q=asel%20802.11%20ht%20control%20field&f=false I have tried using the following filter using Wireshark with no success: wlan_mgt.asel.capable https://www.wireshark.org/docs/dfref/w/wlan_mgt.html Can someone please explain to me what I'm doing wrong or how I can go about finding the correct way of filtering packets to find this field? Many thanks in advance! B asked 18 Jul '15, 22:53  John Snow |
2 Answers:
wlan_mgt.asel.capable == 1 That field name is a boolean type. You must provide whether it exists (1) or does not exist (0). Here is a tip for determining applicable values for field names in wireshark:
answered 20 Jul '15, 17:30  Amato_C |
In the HT Control field: ASEL command: ASEL data: answered 20 Jul '15, 20:19  Guy Harris ♦♦ |
