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IOCTL_NFCSE_GET_NEXT_EVENT IOCTL (nfcsedev.h)

  • Article

The IOCTL_NFCSE_GET_NEXT_EVENT control code returns the next event available in the buffer, or if there are no more buffered events remains pending until a secure element event is available. The event details must then be returned to the caller.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

None

Input buffer length

None

Output buffer

A DWORD indicating the size of the SECURE_ELEMENT_EVENT_INFO structure plus its payload, immediately followed by the SECURE_ELEMENT_EVENT_INFO structure itself.

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Possible error codes are:

Return Code Description
STATUS_INVALID_DEVICE_STATE This code is returned when this IOCTL is called on a device handle that has a filename other than SEEvents, or when there is already another pending request that is not completed yet.
STATUS_INVALID_PARAMETER This code is returned when the output buffer is non-zero, or when the GUID of the secure element does not match any of the enumerated IDs.

Remarks

The following are requirements that the driver must adhere to.

  • This IOCTL must be called on a handle that has an SEEvents relative file name; otherwise, the driver returns STATUS_INVALID_DEVICE_STATE
  • This driver must support CancelIO for this pending IOCTL.
  • This driver must maintain a received queue of the received secure element events that match the subscription type.
  • The following conditions must be met when this IOCTL is received in the driver:
    • If the received queue is empty, then the driver must pend the IOCTL for later completion.
    • If the received queue is non-empty, then the driver must de-queue one event, copy the message buffer to the IOCTL’s output buffer, and complete the IOCTL with STATUS_SUCCESS immediately.
  • If the driver completes this IOCTL with STATUS_SUCCESS, the first DWORD [4 bytes] of the output buffer must contain the size of the SECURE_ELEMENT_EVENT_INFO structure plus its payload.
  • If a received secure element event info is too large to be copied into this IOCTL’s buffer, the driver must copy the required buffer size into the first 4 bytes of the output buffer, set the IOCTL’s information field to sizeof(DWORD), and complete the IOCTL with STATUS_BUFFER_OVERFLOW. The event must then be left in the received queue.

Requirements

Requirement Value
Header nfcsedev.h