Get/Set NAD works only for TPDU readers

For APDU readers the driver does not handle the T=1 blocks so it can't
manage the NAD value.

From my list, 35% of readers work in TPDU mode
https://ccid.apdu.fr/select_readers/?dwFeatures=12

src/ifdhandler.c

@@ -1892,53 +1892,61 @@ EXTERNAL RESPONSECODE IFDHControl(DWORD Lun, DWORD dwControlCode,
  {
  DEBUG_INFO1("Control command for MEP");
 
- /* Set T=1 NAD */
- if (TxLength == 4
- && (TxBuffer[0] == 0x3E)
- && (TxBuffer[1] == 0x00)
- && (TxBuffer[2] == 0x01))
+ if (CCID_CLASS_TPDU != (ccid_descriptor->dwFeatures & CCID_CLASS_EXCHANGE_MASK))
  {
- RxBuffer[0] = 0x3E;
- RxBuffer[1] = 0x00;
- RxBuffer[2] = 0x01;
- DEBUG_INFO1("Set NAD value");
- if (t1_set_param(&CcidSlots[reader_index].t1, IFD_PROTOCOL_T1_NAD,
- TxBuffer[3]))
- /* error */
- RxBuffer[3] = 0x01;
- else
- RxBuffer[3] = 0x00;
- *pdwBytesReturned = 4;
- return_value = IFD_SUCCESS;
+ DEBUG_INFO1("Reader is NOT in TPDU mode");
+ return_value = IFD_NOT_SUPPORTED;
  }
-
- /* Get T=1 NAD */
- if (TxLength == 3
- && (TxBuffer[0] == 0x3F)
- && (TxBuffer[1] == 0x00)
- && (TxBuffer[2] == 0x00))
+ else
  {
- int value = 0;
-
- RxBuffer[0] = 0x3F;
- RxBuffer[1] = 0x00;
- RxBuffer[2] = 0x02;
- DEBUG_INFO1("Get NAD value");
- value = t1_get_param(&CcidSlots[reader_index].t1,
- IFD_PROTOCOL_T1_NAD);
- if (-1 == value)
+ /* Set T=1 NAD */
+ if (TxLength == 4
+ && (TxBuffer[0] == 0x3E)
+ && (TxBuffer[1] == 0x00)
+ && (TxBuffer[2] == 0x01))
  {
- /* error */
- RxBuffer[3] = 0x01;
- RxBuffer[4] = 0x00;
+ RxBuffer[0] = 0x3E;
+ RxBuffer[1] = 0x00;
+ RxBuffer[2] = 0x01;
+ DEBUG_INFO1("Set NAD value");
+ if (t1_set_param(&CcidSlots[reader_index].t1, IFD_PROTOCOL_T1_NAD,
+ TxBuffer[3]))
+ /* error */
+ RxBuffer[3] = 0x01;
+ else
+ RxBuffer[3] = 0x00;
+ *pdwBytesReturned = 4;
+ return_value = IFD_SUCCESS;
  }
- else
+
+ /* Get T=1 NAD */
+ if (TxLength == 3
+ && (TxBuffer[0] == 0x3F)
+ && (TxBuffer[1] == 0x00)
+ && (TxBuffer[2] == 0x00))
  {
- RxBuffer[3] = 0x00;
- RxBuffer[4] = value;
+ int value = 0;
+
+ RxBuffer[0] = 0x3F;
+ RxBuffer[1] = 0x00;
+ RxBuffer[2] = 0x02;
+ DEBUG_INFO1("Get NAD value");
+ value = t1_get_param(&CcidSlots[reader_index].t1,
+ IFD_PROTOCOL_T1_NAD);
+ if (-1 == value)
+ {
+ /* error */
+ RxBuffer[3] = 0x01;
+ RxBuffer[4] = 0x00;
+ }
+ else
+ {
+ RxBuffer[3] = 0x00;
+ RxBuffer[4] = value;
+ }
+ *pdwBytesReturned = 5;
+ return_value = IFD_SUCCESS;
  }
- *pdwBytesReturned = 5;
- return_value = IFD_SUCCESS;
  }
  }