Ethereal-users: Re: [Ethereal-users] Filter ack

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Tue, 28 Mar 2006 11:01:00 -0800
David López Pérez wrote:
I send an ICMP packet (ping) and I receive the the corresponding immediate acknowledgement 

That's an 802.11-layer acknowlegment, not an ICMP acknowledgment.
For a display filter, I think you could filter on the frame type. I don't know what the right filter would be.
A capture filter could also be constructed, but you'd have to look at the raw bytes of the 802.11 header - the libpcap parser doesn't know about 802.11 frame types.