On 1/11/07, Andy Green <[EMAIL PROTECTED]> wrote:
> Jon Smirl wrote:
>
> > If you send UDP packets out on a multicast (or broadcast address)
> > under 802.11 there is no MAC level ACK. UDP packets never have TCP
> > level ACKs.
> >
> > So the question is, if an 802.11 device is associated to an AP, can
> > you use the existing API to send out packets with a NULL essid. If you
> > can do this you don't need to write any new code for the driver.
> >
> > This is sort of like being in ad hoc and infrastructure mode at the same
> > time.
>
> Hi Jon -
>
> For reasons that can best be summed up under "privacy", part of what is
> needed is to completely lose all station identifier information in the
> public unencrypted network.
>
> Another issue is that the unencrypted channel needs to operate even if
> the main device is unassociated.  For example if you travel with your
> laptop and there are no APs, there's no reason you shouldn't still be
> able to use the unencrypted channel with any nearby devices, eg, in an
> airport waiting lounge.

That is just a description of how ad hoc mode works. Ad hoc is a
standard part of 802.11.

> I found a way to send unencrypted packets through the 80211 stack,
> associated or not, but some small driver patching is still required, I
> will report more shortly.
>
> -Andy
>


-- 
Jon Smirl
[EMAIL PROTECTED]

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