Reporting a NIC's IPsec Offload Version 2 Capabilities
To specify IPsec offload version 2 (IPsecOV2) capabilities, an NDIS 6.1 and later miniport driver specifies the current or default configuration of a NIC in an NDIS_IPSEC_OFFLOAD_V2 structure. Miniport drivers must include the default IPsecOV2 configuration in the NDIS_MINIPORT_ADAPTER_OFFLOAD_ATTRIBUTES structure. Miniport drivers call the NdisMSetMiniportAttributes function from the MiniportInitializeEx function and pass in the information in NDIS_MINIPORT_ADAPTER_OFFLOAD_ATTRIBUTES.
Miniport drivers must report changes in the IPsecOV2 capabilities, if any, in the NDIS_STATUS_TASK_OFFLOAD_CURRENT_CONFIG status indication.
Note NDIS provides a direct OID request interface for NDIS 6.1 and later drivers. The direct OID request path supports OID requests that are queried or set frequently.
In response to a query of OID_TCP_OFFLOAD_CURRENT_CONFIG, NDIS includes the NDIS_IPSEC_OFFLOAD_V2 structure in the NDIS_OFFLOAD structure that NDIS returns in the InformationBuffer member of the NDIS_OID_REQUEST structure. NDIS uses the information that the miniport driver provided.