Enabling and Disabling Task Offload Services

A protocol driver can enable or disable task offload services for an underlying miniport adapter by issuing an OID_OFFLOAD_ENCAPSULATION OID set request. This OID request sets the required encapsulation type and tells the miniport driver to activate all of the available task offload services.

Before issuing the OID_OFFLOAD_ENCAPSULATION OID set request, the protocol driver should make sure that the underlying miniport adapter supports the required encapsulation type. There are two ways to do this:

• Check the NDIS_BIND_PARAMETERS structure that the protocol driver received in its ProtocolBindAdapterEx function.
• Issue an OID_TCP_OFFLOAD_CURRENT_CONFIG query request.

If the miniport driver supports any task offload type that supports the requested encapsulation type, the miniport driver must return NDIS_STATUS_SUCCESS in response to the OID_OFFLOAD_ENCAPSULATION set request. Otherwise, the miniport driver should return NDIS_STATUS_INVALID_PARAMETER.