Overload Probe Request to send data

Overload Probe Request to send data

[Cassiano Tartari]

Hi,

    I'd like to know if somebody could help me giving a way to modify
the iwlwifi driver to overload the Probe Requests to send data? Which
file I need to modify, for what word I need search for...

Thankful,

Best Regards,

-
Cassiano Valle Tartari
Computer Engineer

Tel: +55.48.84474818
Email: falecom@cassianotartari.eng.br
Site: http://www.cassianotartari.eng.br

Re: Overload Probe Request to send data

[Guy, Wey-Yi]

On Thu, 2010-11-11 at 07:35 -0800, Cassiano Tartari wrote:
> Hi,
> 
>     I'd like to know if somebody could help me giving a way to modify
> the iwlwifi driver to overload the Probe Requests to send data? Which
> file I need to modify, for what word I need search for...
> 
> Thankful,
> 

If you want to do it in iwlwifi, lease take a look at
iwl_fill_probe_req() in iwl-scan.c

But do please aware there is size limitation of the probe request from
uCode.

Wey

Re: Overload Probe Request to send data

[Johannes Berg]

On Thu, 2010-11-11 at 13:35 -0200, Cassiano Tartari wrote:
> Hi,
> 
>     I'd like to know if somebody could help me giving a way to modify
> the iwlwifi driver to overload the Probe Requests to send data? Which
> file I need to modify, for what word I need search for...

Just give the data to iw in a vendor specific IE and iwlwifi will send
it out. Don't modify the kernel at all.

johannes

Re: Overload Probe Request to send data

[Cassiano Tartari]

Sorry johannes, but I didn't understand what you said.

I need to send data without confiability, just in one way client->AP
and without association, and this information is too short.


On Thu, Nov 11, 2010 at 3:53 PM, Johannes Berg
<johannes@sipsolutions.net> wrote:
> On Thu, 2010-11-11 at 13:35 -0200, Cassiano Tartari wrote:
>> Hi,
>>
>>     I'd like to know if somebody could help me giving a way to modify
>> the iwlwifi driver to overload the Probe Requests to send data? Which
>> file I need to modify, for what word I need search for...
>
> Just give the data to iw in a vendor specific IE and iwlwifi will send
> it out. Don't modify the kernel at all.
>
> johannes
>
>

Re: Overload Probe Request to send data

[Johannes Berg]

On Thu, 2010-11-11 at 17:18 -0200, Cassiano Tartari wrote:
> Sorry johannes, but I didn't understand what you said.
> 
> I need to send data without confiability, just in one way client->AP
> and without association, and this information is too short.

what information is too short? Use multiple IEs if one isn't enough...

johannes

Re: Overload Probe Request to send data

[Johannes Berg]

On Thu, 2010-11-11 at 17:18 -0200, Cassiano Tartari wrote:
> Sorry johannes, but I didn't understand what you said.
> 
> I need to send data without confiability, just in one way client->AP
> and without association, and this information is too short.

Oh ... and why not use vendor specific public action frames?

johannes

Re: Overload Probe Request to send data

[Cassiano Tartari]

@johannes

I tryed to find some information about how to overload the Vendor
Specific Action frame.

But I only found:

VSA frame - vendor specific action frame
- stand-alone management frame
- doesn't contain timestamp
- no segmentation required (max MMPDU)

I don't know if I used the correct works, but I tryed: "vendor
specific action frame" 802.11 on my researchs.

And a little more information at IEEE Std 802.11 pdf on page 151.

I'm studying the protocol.


On Thu, Nov 11, 2010 at 7:08 PM, Johannes Berg
<johannes@sipsolutions.net> wrote:
>
> On Thu, 2010-11-11 at 17:18 -0200, Cassiano Tartari wrote:
> > Sorry johannes, but I didn't understand what you said.
> >
> > I need to send data without confiability, just in one way client->AP
> > and without association, and this information is too short.
>
> Oh ... and why not use vendor specific public action frames?
>
> johannes
>

-
Cassiano Valle Tartari
Computer Engineer

Tel: +55.48.84474818
Email: falecom@cassianotartari.eng.br
Site: http://www.cassianotartari.eng.br