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From: Martijn van Oosterhout (kleptogsvana.org)
Date: Wed Dec 05 2001 - 18:23:26 CST

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    On Wed, Dec 05, 2001 at 10:14:33AM -0500, LEE, Yui-wah (Clement) wrote:
    > Hi,
    >
    > Using Orinoco card on Linux, is there a way to get the list of all
    > available ESSIDs in range? I know I can get a single ESSID -- the
    > currently associated one -- by SIOCGIWESSID, but I want to get all
    > available in range.

    I'm not entirely sure, but I seem to remember the ESSID appearing in the raw
    tcpdump output of a wireless card. I'm not sure if that's before or after
    filtering however.

    Ofcourse, this would only pick up active networks on the same frequency...

    HTH, 

    -- 
Martijn van Oosterhout <kleptogsvana.org>
http://svana.org/kleptog/
> Terrorists can only take my life. Only my government can take my freedom.