Re: Request for DECT LINKTYPE

[Guy Harris <guy () alum mit edu>]

On Dec 22, 2008, at 1:58 PM, Matthias Wenzel wrote:

> I just had a look, and thanks for pointing me there. But that seems  
> very
> device independant. To me it seems its a generic way to record URBs  
> on a
> USB bus in pcap, but correct me if I am wrong.

I think he meant to look at it as an example of how to add support for  
capturing on non-network-interface devices in libpcap.  There are  
other examples, such as Bluetooth, Endace DAG cards, and Intel SS7  
cards on Linux, and Endace DAG cards on FreeBSD.  The DAG and SS7 card  
handlers might be better examples in your case.

> In contrast we have a very specific device, and there's no such  
> thing as
> a cordless or DECT layer within linux (yet). If there was we'd
> appreciate to interface and record there...
> But as of now there's a char device for a special HW, with ioctls  
> and I
> doubt anyone believes in transporting that very specifig thingie in  
> pcap...

I do.  You'd have pcap_create() for your platform look for a device  
string that referred to your device, and call a separate _create  
routine for your device; that routine would set up the activate  
routine for your device, and that activate routine would open the  
character device, set it up for capturing, and set up the other  
routines for your device, such as the _read routine to read packets  
from it.
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