QUERY_OFFLOAD_COMPLETE_HANDLER callback function (ndischimney.h)

Article
10/21/2021

[The TCP chimney offload feature is deprecated and should not be used.]

NDIS calls a protocol driver's or intermediate driver's ProtocolQueryOffloadComplete function to complete a query offload operation that the driver previously initiated by calling the NdisQueryOffload function.

Syntax

QUERY_OFFLOAD_COMPLETE_HANDLER QueryOffloadCompleteHandler;

void QueryOffloadCompleteHandler(
  [in] IN NDIS_HANDLE ProtocolBindingContext,
  [in] IN PNDIS_PROTOCOL_OFFLOAD_BLOCK_LIST OffloadBlockList
)
{...}

Parameters

[in] ProtocolBindingContext

A handle to a context area allocated by the protocol driver. The driver maintains the per binding context information in this context area. The driver supplied this handle to NDIS when the driver called the NdisOpenAdapterEx function.

[in] OffloadBlockList

A pointer to an NDIS_PROTOCOL_OFFLOAD_BLOCK_LIST structure that can be a stand-alone structure or the root of a linked list of such structures. These structures identify the state that was queried or that was attempted to be queried.

Return value

None

Remarks

In response to an underlying offload target's or intermediate driver's call to the NdisMQueryOffloadStateComplete function, NDIS calls the overlying protocol driver's or intermediate driver's ProtocolQueryOffloadComplete function.

An intermediate driver must propagate the completion of the query offload operation to the driver above it by calling NdisMQueryOffloadStateComplete. For more information, see Propagating the Completion of a State-Manipulation Operation.

From the NDIS_PROTOCOL_OFFLOAD_BLOCK_LIST structure that was passed to its ProtocolQueryOffloadComplete function, the intermediate driver constructs an NDIS_MINIPORT_OFFLOAD_BLOCK_LIST structure. For more information, see Reusing an NDIS_PROTOCOL_OFFLOAD_BLOCK_LIST Structure. When calling the NdisMQueryOffloadStateComplete function, the intermediate driver passes a pointer (the OffloadBlockList parameter) to this newly constructed NDIS_MINIPORT_OFFLOAD_BLOCK_LIST structure.

Requirements

Requirement	Value
Target Platform	Windows
Header	ndischimney.h (include Ndischimney.h)