Wireless Extensions - 18 and HostAP

[Ajeet Nankani]

Though it is not directly related to HostAP, but still concerned with it.

How to upgrade to Wireles Extensions to 18 from 16 or 17?

I guess Jouni can answer better following question.
WE-18, defines extended scan request, which includes many options.
What options, in that extended scan request, from the following are 
supported by prism2/2.5/3-(1.7.4.) with HostAP 0.3.7 driver.

mode, scan_type, essid_len, num_channels, sockaddr bssid, essid, 
probe_delay, min_channel_time, max_channel_time.

-ajeet.