RDF_CARD_POWER (Mandatory)

The RDF_CARD_POWER callback function resets or powers down an inserted smart card.

NTSTATUS 
(*ReaderFunction[RDF_CARD_POWER])(
  PSMARTCARD_EXTENSION SmartcardExtension
);
 

Parameters

SmartcardExtension

Points to the smart card extension of the device.

Input Values

SmartcardExtension->MajorIoControlCode

Contains IOCTL_SMARTCARD_POWER.

SmartcardExtension->MinorIoControlCode

Contains one of the following minor codes, depending on the function to be performed.

Minor Code	Meaning
SCARD_COLD_RESET	Performs a cold reset of the card.
SCARD_WARM_RESET	Performs a warm reset of the card.
SCARD_POWER_DOWN	Switches off card power.

SmartcardExtension->IoRequest.ReplyBufferLength

Contains the length of the reply buffer.

Output Values

SmartcardExtension->IoRequest.ReplyBuffer

This buffer receives the ATR returned by the card. In addition, you must transfer the ATR to SmartcardExtension->CardCapabilities.ATR.Buffer to let the library parse the ATR.

SmartcardExtension->IoRequest.Information

Receives the actual length of the ATR. In addition you must transfer the length of the ATR to SmartcardExtension->CardCapabilities.ATR.Length.

Return Values

This function returns an NTSTATUS value. Possible values are the following.