[Winpcap-users] trying to interface a generic 802.11abg with ethereal( windows) using prism header

[Loris Degioanni]

I don't understand well what you are doing. You talk about modifying the 
sources of a driver. Which driver? NPF? The wirless card miniport? (are 
there wireless NIC driver sources for Windows available around?)

In order to send raw 802.11 frames, you will probably have to bypass 
NDIS completely, and talk with your NIC driver directly. You may have to 
add to the NIC driver a custom I/O interface for the applications too.

Loris



hello wrote:
> Hi
> 
> I am facing a peculiar problem. ( system.. winpcap beta, ethereal 11,
> windows XP)
> 
> My 802.11 wireless card adaptor interface is getting recognized by the
> winpcap / ethereal. And when I ship a packet with false Ethernet
> header, it even displays it in the ethereal GUI. (normal unmodified
> release driver code)
> 
> Now I modififed my driver so that I was sending a 144 bytes prism
> header ahead of the frame. My miniport driver debug prints show that
> that the packets are getting shipped up constantly and the ndis
> buffers are successfully comsumed and released. However winpcap /
> ethereal is not indicating any packet.
> 
> The WinPcap version is the latest Beta( which works when I ship the
> data packet up with false Ethernet header (I have tried reinstalling
> it too).
> 
> 1) If anyone has any clue why the NDIS/ winpcap is dropping the
> packets, please help.
> 2) Is there a miniport handshake which got mixed up during this process.
> 
> 3) is media state connect essential even in promiscous mode.
> 4) what all should i announce to ndis oid calls/ handshake so that
> winpcap starts getting the packets.
> 
> currently the only modification I am doing is that the entire data
> content has been changed to prism frame.. and the rest of the
> interface is left unchanged, and all the packets have started
> dropping.
> 
> Regards,
> Ankur
> 
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