Re: Capturing packets with bad FCS in monitor mode

[ABM Musa <amusa2@uic.edu>]

On 08/05/2010 11:40 AM, Daniel Haid wrote:
>> I can get packets with crc error using this method and I get lot of
>> corrupted packets. I am using ath9k with openwrt for router station
>> pro+ubiquity sr-71A card and tplink 1043nd.
>>      
> I am using an ubiquity sr-71X card, and still not one corrupted packet.
>
> I think I need to artificially create and transmit a corrupted packet. How
> can I do that?
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I am not sure about how to create corrupted packets. Normally you should 
get lot of corrupted packets from surrounding transmission. In my case, 
monitor mode hangs sometime and I don't get any packets. Then if I 
delete the interface and create a new interface using the iw command I 
gave earlier, I get packets with crc error. You can also modify already 
created interface using

iw wlan0 set monitor flag fcsfail

Musa