T1_DATA - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// smclib.h

typedef struct _T1_DATA {
  UCHAR   IFSC;
  UCHAR   IFSD;
  ULONG   BytesReceived;
  ULONG   BytesSent;
  ULONG   BytesToSend;
  UCHAR   LastError;
  BOOLEAN MoreData;
  UCHAR   NAD;
  ULONG   OriginalState;
  UCHAR   Resend;
  UCHAR   Resynch;
  UCHAR   RSN;
  UCHAR   SSN;
  ULONG   State;
  UCHAR   Wtx;
  PUCHAR  ReplyData;
  BOOLEAN WaitForReply;
  UCHAR   InfBytesSent;
  UCHAR   Reserved[10 - sizeof(PUCHAR)- sizeof(BOOLEAN)- sizeof(UCHAR)];
} T1_DATA, *PT1_DATA;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-smclib-_t1_data)

_T1_DATA structure

Description

The T1_DATA structure is used by the smart card driver library to process T1 I/O.

Members

IFSC

Contains the field size that can be transmitted.

IFSD

Contains the field size that can be received.

BytesReceived

Contains the number of bytes already received from the smart card.

BytesSent

Contains the number of bytes already sent to the smart card.

BytesToSend

Contains the total number of remaining bytes to send.

LastError

Contains the T1 error code of the last received block.

MoreData

NAD

Contains the node address byte to send to the smart card.

OriginalState

Contains the state before an error occurred.

Resend

Contains the resend counter.

Resynch

Contains the resynch counter.

RSN

Contains the number of sent I-Blocks, as defined in the ISO 7816-3 Specification.

SSN

Contains the send sequence number (SSN). This member has a value of 0 or 1 as defined in the ISO 7816-3 Specification.

State

Contains the current state of the protocol.

Wtx

Contains the waiting time extension for a T=1 transmission. If nonzero, this is a multiplier for the block waiting time. Usually, the driver will time out if the block waiting time expires. Several smart card operations require more time. The smart card answers with a waiting time extension. Therefore, the block waiting time must be multiplied with the Wtx value. If this value is nonzero, it applies as a waiting extension.

ReplyData

A pointer to the buffer that contains the result of the operation.

WaitForReply

If TRUE, execute the operation synchronously.

InfBytesSent

Reserved

Reserved, do not use.

Remarks

This structure must not be directly modified by a reader driver.

View the official Windows Driver Kit DDI reference

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