/**
* Transfers APDU data to the device and receives response from the device.
* @param tx_buffer Buffer with APDU to be sent.
* @param tx_size Size of APDU.
* @param rx_buffer Buffer to store the response.
* @param rx_size Before call: size of <tt>rx_buffer</tt>
* After call: size of received response.
* @return JSR177_STATUSCODE_OK is if all done successfuly, JSR177_STATUSCODE_FAIL otherwise
*/
JSR177_STATUSCODE jsr177_xfer_data_start(jbyte *tx_buffer, jsize tx_size,
jbyte *rx_buffer, jsize *rx_size, void **context) {
int tmp_rx_size = *rx_size;
javacall_result result =
javacall_carddevice_xfer_data_start(tx_buffer, tx_size,
rx_buffer, &tmp_rx_size, context);
switch (result) {
case JAVACALL_OK:
*rx_size = tmp_rx_size;
return JSR177_STATUSCODE_OK;
case JAVACALL_FAIL:
default:
return JSR177_STATUSCODE_FAIL;
case JSR177_STATUSCODE_WOULD_BLOCK:
return JSR177_STATUSCODE_WOULD_BLOCK;
}
}
/**
* Performs data transfer to the device.
* <p>Java declaration:
* <pre>
* private native int cmdXfer0(byte[] request, byte[] response);
* </pre>
* @param request Buffer with request data
* @param response Buffer for response data
* @return Length of response in case of success, else -1
*/
KNIEXPORT KNI_RETURNTYPE_INT
KNIDECL(com_sun_cardreader_PlatformCardDevice_cmdXfer0) {
jint retcode;
javacall_int32 tx_length, rx_length;
char *tx_buffer, *rx_buffer;
MidpReentryData* info;
void *context = NULL;
javacall_result status_code;
KNI_StartHandles(2);
KNI_DeclareHandle(request_handle);
KNI_DeclareHandle(response_handle);
info = (MidpReentryData*)SNI_GetReentryData(NULL);
KNI_GetParameterAsObject(1, request_handle);
if (KNI_IsNullHandle(request_handle)) {
tx_buffer = NULL;
tx_length = 0;
retcode = -1;
goto end;
} else {
tx_length = KNI_GetArrayLength(request_handle);
tx_buffer = SNI_GetRawArrayPointer(request_handle);
}
KNI_GetParameterAsObject(2, response_handle);
if (KNI_IsNullHandle(response_handle)) {
rx_buffer = NULL;
rx_length = 0;
retcode = -1;
goto end;
} else {
rx_length = KNI_GetArrayLength(response_handle);
rx_buffer = SNI_GetRawArrayPointer(response_handle);
}
if (tx_length > 5) {
jsize apdu_len = 5 + (tx_buffer[4]&0xFF) + 1;
if (tx_length > apdu_len) {
tx_length = apdu_len;
}
}
if (info == NULL) {
status_code = javacall_carddevice_xfer_data_start(tx_buffer,
tx_length,
rx_buffer,
&rx_length, &context);
} else {
context = info->pResult;
status_code = javacall_carddevice_xfer_data_finish(tx_buffer,
tx_length,
rx_buffer,
&rx_length, context);
}
if (status_code == JAVACALL_WOULD_BLOCK) {
midp_thread_wait(CARD_READER_DATA_SIGNAL, SIGNAL_XFER, context);
goto end;
}
if (status_code != JAVACALL_OK) {
retcode = -1;
} else {
retcode = rx_length;
}
end:
KNI_EndHandles();
KNI_ReturnInt(retcode);
}