Hi,

Better contact the TCPdump/libpcap mailing list 
(http://www.tcpdump.org/) and WinPcap (http://www.winpcap.org) mailing 
list and ask how to get ahead. A DLT_ value could be all you need?

Thanx,
Jaap

Will Barker wrote:
> We currently produce PC-based WAN products. These include support for 
> synchronous protocols such as X.25, PPP etc.
> 
> We can currently capture frames using our own drivers/applications on 
> Windows and linux, save this information to file (in libpcap format) 
> which can then subsequently be read by wireshark.
> 
> While this is useful it would be great if we could achieve the same 
> thing but in real-time.
> 
> I assume that this could (technically) be achieved on Windows either by
> 
> 1)    extending winpcap in someway to enable it to capture our frames 
> and pass them up to Wireshark
> 
> 2)    sit alongside winpcap and offer the frames up to wireshark 
> directly ourselves
> 
> I assume 2) would require us to produce our own capture driver (NDIS on 
> Windows) which Wireshark would see as a pseudo LAN driver and we could 
> pass our WAN frames up to it using some (libpcap-based?) format or other?
> 
> Can anyone point me in the right direction as to how to achieve this? 
> Developing the NDIS driver itself is not a problem since we’ve lots of 
> experience there – the issue is one of interfaces and what is required 
> in that regard in order for us to interface to wireshark as seamlessly 
> as possible.
> 
> The next question would then be – how to achieve the same thing on linux?
> 
> Thanks
> 
> Will

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