PROTOCOL_CM_INCOMING_CALL_COMPLETE callback function (ndis.h)

The ProtocolCmIncomingCallComplete function is required. When NDIS calls this function, ProtocolCmIncomingCallComplete indicates to the call manager that the connection-oriented client has finished processing of an incoming call offer that the call manager previously dispatched through NdisCmDispatchIncomingCall.

Note  You must declare the function by using the PROTOCOL_CM_INCOMING_CALL_COMPLETE type. For more information, see the following Examples section.



void ProtocolCmIncomingCallComplete(
  [in] NDIS_STATUS Status,
  [in] NDIS_HANDLE CallMgrVcContext,
  [in] PCO_CALL_PARAMETERS CallParameters


[in] Status

Indicates the final status of the operation to dispatch an incoming call to a connection-oriented client.

[in] CallMgrVcContext

Specifies the handle to a call manager-allocated context area in which the call manager maintains its per-VC state. The call manager supplied this handle from its ProtocolCoCreateVc function.

[in] CallParameters

Pointer to the call parameters as specified by the call manager in the call to NdisCmDispatchIncomingCall. The signaling protocol determines which call parameters, if any, the call manager can change.

Return value



When the connection-oriented client has completed processing of an incoming connection offer that the call manager dispatched to it, this routine will be called if NdisCmDispatchIncomingCall returned NDIS_STATUS_PENDING. The final status of the incoming call is found in Status. Possible values for Status include, but are not limited to:

If the client accepts the incoming call, the call manager should send signaling message(s) to indicate to the calling entity that the call has been accepted. If the client does not accept the call, the call manager should send signaling message(s) to indicate that the call has been rejected.


To define a ProtocolCmIncomingCallComplete function, you must first provide a function declaration that identifies the type of function you're defining. Windows provides a set of function types for drivers. Declaring a function using the function types helps Code Analysis for Drivers, Static Driver Verifier (SDV), and other verification tools find errors, and it's a requirement for writing drivers for the Windows operating system.

For example, to define a ProtocolCmIncomingCallComplete function that is named "MyCmIncomingCallComplete", use the PROTOCOL_CM_INCOMING_CALL_COMPLETE type as shown in this code example:


Then, implement your function as follows:

    NDIS_STATUS  Status,
    NDIS_HANDLE  CallMgrVcContext,
    PCO_CALL_PARAMETERS  CallParameters

The PROTOCOL_CM_INCOMING_CALL_COMPLETE function type is defined in the Ndis.h header file. To more accurately identify errors when you run the code analysis tools, be sure to add the Use_decl_annotations annotation to your function definition. The Use_decl_annotations annotation ensures that the annotations that are applied to the PROTOCOL_CM_INCOMING_CALL_COMPLETE function type in the header file are used. For more information about the requirements for function declarations, see Declaring Functions by Using Function Role Types for NDIS Drivers.

For information about Use_decl_annotations, see Annotating Function Behavior.


Minimum supported client Supported for NDIS 6.0 and NDIS 5.1 drivers (see ProtocolCmIncomingCallComplete (NDIS 5.1)) in Windows Vista. Supported for NDIS 5.1 drivers (see ProtocolCmIncomingCallComplete (NDIS 5.1)) in Windows XP.
Target Platform Windows
Header ndis.h (include Ndis.h)

See also