[Guy Harris <guy@xxxxxxxxxxxx>]

On Sep 5, 2003, at 7:17 PM, darren wrote:

> The moment the card is set into its encapsulation mode of say 
> "CiscoHDLC", it will automatically stripe away my L2 header. Is there 
> a bug with my card driver/firmware? Guy Harris have suggested earleir 
> that this is likely to be a problem with the driver/firmware, but my 
> card vendors have strongly insisted that theres nothing wrong and 
> highlighted that the card is working fine with ipchains as proof of 
> its operability in Linux.

"Operability in Linux" in what sense?  Does the ipchains stuff look at 
the link-layer header by using mac.raw?  If not, then all they've 
proven is that it works with ipchains, not that it works with 
PF_PACKET/SOCK_RAW sockets that attempt to get the entire packet, 
including the link-layer header (Cisco HDLC header, in this case), by 
copying data starting at mac.raw.