The T1_DATA structure is used by the Smart Card Driver Library for processing T1 I/O. It should not be directly modified by a driver.
typedef struct _T1_DATA {
//
// Current information field size that can be transmitted
//
UCHAR InfSize;
//
// Number of bytes already received from smart card
//
ULONG BytesReceived;
//
// Number of bytes already sent to the card;
//
ULONG BytesSent;
//
// Total number of bytes still to send
//
ULONG BytesToSend;
//
// T1 error code of last received block
//
UCHAR LastError;
//
// This is the node address byte to be sent to the card
//
UCHAR NAD;
//
// State before error occurred
//
ULONG PrevState;
//
// Resend counter
//
UCHAR Resend;
//
// Resync counter
//
UCHAR Resynch;
//
// The Send Sequence Number is either 0 or 1 as defined in ISO 7816-3
//
UCHAR SSN;
//
// Current state of protocol
//
ULONG State;
//
// Waiting time extension requested by the smart card
// This value should be used by the driver to extend block waiting time.
//
UCHAR Wtx;
} T1_DATA, *PT1_DATA;
The following member is important for the driver: