The signal level is a property of the wireless interface.
It is not a property of any packets captured from that interface, and
so cannot be derived from the packet content.
tcpdump(1) is showing interface information that
you could also display with iwconfig(1).
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[d/l]
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I was obviously on the wrong track. Do you know of a way to measure signal level between two clients associated on the same AP?
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Also, I've noted that TCPdump will report the signal value between myself and another client when sending echo requests to it. Actually, during the echo request I see the reply directly from the target and also from the AP that is acting as a hub in this instance. I did not think that iwconfig was able to provide signal levels between clients in this fashion. Is there a perl module that can read interface statistics such as TCPdump appears to be doing?
Any direction is greatly appreciated.
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