title: Sort of NDIS Intermediate Miniport on Mac OS X
body: <p>We have a solution of an intermediate network layer which is currently implemented as a NDIS IM on Windows. I am investigating how this thing could be ported to Mac OS X.</p>
  
  <p>Ideally, it should be an intermediate driver/kext right on top of the ethernet-capable adapter, and below any IP/ARP/whatsoever, operating only with ethernet frames.</p>
  
  <p>Some tutorial/sample would be preferred, something like the passthru sample from the WDK, although any hints would be appreciated.</p>
  
  <p>No, this is not a filter/firewall, it's not vpn, it's a completely new and quite complicated intermediate layer operating at that level.</p>