Question on ipsec offload driver

Hi,
Anyone has experiance on writing a ipsec offload driver on win2k?.I am writing an IPSEC offload simulator driver for win2k. I want to offload all the ipsec offload capabilities that are given by the OS.On receive, the packet is processed with matching SA .Then why the OFFLOAD_IPSEC_ADD_SA is giving parameters SrcAddr, SrcMask, DestMask, DestPort? .Is the driver is supposed to do the Security policy checking also? If Security Management Console set the Advanced IPSec filter options like protocol and ports,is it the drivers duty to check whether SA applied to the packet is the correct one?If so,if the driver won’t do it,does the NDIS ipsec layer verifies it?.

Thanks in advance,
Reeja


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