Re: How to configure monitor devices for HT80?

[Ben Greear <greearb@candelatech.com>]

On 05/05/2014 12:22 PM, Johannes Berg wrote:
> On Mon, 2014-05-05 at 12:06 -0700, Ben Greear wrote:
>> I'm trying to sniff using a monitor interface on ath10k, on channel 36.
>>
>> I'm seeing lots of packets, but not all that the AP claims to be sending
>> (when sniffing vap0).  I am not not certain the monitor interface is
>> using HT80 or not.
>>
>> Anyone have a working example of the proper iw commands to create
>> a monitor interface on channel 36 for HT80?
> 
> ...
> iw wlan0 set freq 5180 80 5210

Thanks, this works at least most of the time.

But, it seems if I have another vif up, it will fail, even if that
vif is (should be?) using the exact same frequency.

./local/sbin/iw phy wiphy0 interface add moni0 type monitor
./local/sbin/ip link set dev moni0 up
./local/sbin/iw dev moni0 set freq 5180 80 5210
-> yields error:
command failed: Device or resource busy (-16)


I'm not absolutely certain the monitor device still works
properly or not, but it at least mostly works.

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com