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The T1_DATAstructure 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 {
UCHAR
InfSize;
ULONG
BytesReceived
;
ULONG
BytesSent
;
ULONG
BytesToSend
;
UCHAR
LastError
;
UCHAR
NAD
;
ULONG
PrevState
;
UCHAR
Resend
;
UCHAR
Resynch
;
UCHAR
SSN
;
ULONG
State
;
UCHAR
Wtx
;
} T1_DATA, *PT1_DATA;
Members
The following member is important for the driver:
- InfSize
- Current information field size that can be transmitted.
- BytesReceived
- Number of bytes already received from the smart card.
- BytesSent
- Number of bytes already sent to the smart card.
- BytesToSend
- Number of bytes remaining to send.
- LastError
- The T1 error code of the last block received.
- NAD
- The Node Address byte to be sent to the card.
- PrevState
- The state before an error occurred.
- Resend
- A resend counter.
- Resynch
- A resync counter.
- SSN
- The Send Sequence Number; either or 1 as defined in ISO 7816-3
- State
- 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 should time out if the block waiting time expires.
Several smart card operations need longer time, so the smart card
answers with a waiting time extension, and therefore the block
waiting time must be multiplied with the
Wtxvalue. Note that this value only applies as a waiting
extension if the value is nonzero.
Last updated on Tuesday, July 13, 2004