On Thu, May 19, 2011 at 4:28 PM, Dino K <socalli...@cloudcomp.info> wrote:
> I can tell you in my experience... tablets/phones are not great devices to
> run this type of stuff on... the wifi modems are really narrow range and try
> to lock onto one signal mostly...

Dino brings up a good point.

Client behavior of certain hardware really challenges doing any
meaningful work with a program like this.  PDA devices like the iPhone
only output like 16 dBm (as opposed to like 20-26 dBm on some other
cards), and their antennas are really crappy. (iPads have anywhere
from 1-4 dBi, depending on which internal antenna, which band
(2.4/5GHz), which exact channel of the band, and what type of wireless
(802.11b/g/n and ht20/ht40).  This may sound like minutiae, but it can
make a big difference in quality and quantity of traffic you sniff.

As for "locking signal" issues, each client behaves very differently
when it sees "better" signals.  How long a client keeps a known good
signal depends on the roaming aggressiveness to "better SSIDs", and on
some clients, this is easy to change (e.g. Intel drivers on Windows),
and on others, I'm still looking (e.g. OS X).

These roaming issues should be standardized somewhat when 802.11r is ratified.

Rog
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