How to capture MAC layer packets (Wifi Beacons for instance)

["Pedro Rosas" <pedro.rosas.mcc () gmail com>]

Hi all,

 

I am currently working on a project at my university, and I need to capture
some 802.11 frames.

For instance, I need to capture the Beacons sent from the APs usually every
100ms.

When I run Wireshark both on windows 7 and Ubuntu 9.04 I can only capture
packets from higher layers (TCP, HTTP, etc.).

Is it possible to capture the frames from MAC layers of 802.11? For
instance, the beacons?

Thanks in advance.

 

Best Regards,

  Pedro Rosas

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