Passthru driver - How to reply to packets

Hello, greetings from a newcomer on this list.

One example is return a TCP RST packet instead of just drop if you want to
reject a TCP connection (Common firewall practice) .

What I essentially want to do is something like

call MPSend() from PtReceive()

But I don’t know how to move from a ProtocolBindingContext to a
MiniportAdapterContext if this approach is at all possible.

Can someone shine some light on this?

Jan