NdisCmDispatchIncomingCallQoSChange function (ndis.h)

Article
02/22/2024

NdisCmDispatchIncomingCallQoSChange notifies a client that a request to change the quality of service on that client's active connection has been received over the network.

Syntax

void NdisCmDispatchIncomingCallQoSChange(
  [in] NDIS_HANDLE         NdisVcHandle,
  [in] PCO_CALL_PARAMETERS CallParameters
);

Parameters

[in] NdisVcHandle

Specifies the handle to the VC for which the change in QoS is being requested. The call manager originally obtained this handle either when it called NdisCoCreateVc to set up this connection for an incoming call or as an input parameter to its ProtocolCoCreateVc function.

[in] CallParameters

Pointer to a structure of type CO_CALL_PARAMETERS that specifies the new QoS, requested by the client on the remote node, for this connection.

Return value

None

Remarks

A stand-alone call manager calls NdisCmDispatchIncomingCallQoSChange to notify the client that it has received a request to modify the QoS on an active connection. Such a CM supports dynamic QoS changes on active calls, which is a feature like QoS itself that depends on the signaling protocol.

When the CM itself receives a request for a QoS change, the call manager passes appropriately modified call parameters to NdisCmActivateVc, so the underlying miniport driver also is notified of the proposed QoS change. Assuming the underlying miniport driver accepts the changed call parameters, the CM then calls NdisCmDispatchIncomingCallQoSChange.

A call to NdisCmDispatchIncomingCallQoSChange causes NDIS to call the client's ProtocolClIncomingQoSChange function. The client accepts the proposed modifications to the call parameters for the VC by doing nothing, except possibly updating any state it maintains about the QoS for the VC, and returning control. Otherwise, the client rejects the proposed QoS change by tearing down the call.

Only stand-alone call managers, which register themselves with NDIS as protocol drivers, can call NdisCmDispatchIncomingCallQoSChange. Connection-oriented miniport drivers that provide integrated call-management support call NdisMCmDispatchIncomingCallQoSChange instead.

Requirements

Requirement	Value
Minimum supported client	Supported for NDIS 6.0 and NDIS 5.1 drivers (see NdisCmDispatchIncomingCallQoSChange (NDIS 5.1)) in Windows Vista. Supported for NDIS 5.1 drivers (see NdisCmDispatchIncomingCallQoSChange (NDIS 5.1)) in Windows XP.
Target Platform	Desktop
Header	ndis.h (include Ndis.h)
Library	Ndis.lib
IRQL	<= DISPATCH_LEVEL
DDI compliance rules	Irql_CallManager_Function(ndis)