/**
* Initiates data receiving via connection.
*
* If JAVACALL_WOULD_BLOCK is returned,
* this function should be called again after the notification through
* javanotify_bt_protocol_event() with JAVACALL_EVENT_BT_RECEIVE_COMPLETE type.
*
* @param handle connection handle
* @param pData pointer to data buffer
* @param len length of the buffer
* @param pBytesRead number of bytes that were received,
* 0 indicates end-of-data
* @retval JAVACALL_OK on success,
* @retval JAVACALL_WOULD_BLOCK if the caller needs a notification to complete the operation
* @retval JAVACALL_FAIL on error
*/
javacall_result javacall_bt_rfcomm_receive(
javacall_handle handle,
char* pData,
int len,
/*OUT*/ int* pBytesReceived)
{
return javacall_bt_l2cap_receive(handle, pData, len, pBytesReceived);
}
/*
* Reads data from a packet received via Bluetooth stack.
*
* Note: the method gets native connection handle directly from
* <code>handle<code> field of <code>L2CAPConnectionImpl</code> object.
*
* @param buf the buffer to read to
* @param offset he start offset in array <code>buf</code>
* at which the data to be written
* @param size the maximum number of bytes to read,
* the rest of the packet is discarded.
* @return total number of bytes read into the buffer or
* <code>0</code> if a zero length packet is received
* @throws IOException if an I/O error occurs
*/
KNIEXPORT KNI_RETURNTYPE_INT
Java_com_sun_jsr082_bluetooth_btl2cap_L2CAPConnectionImpl_receive0(void) {
int length, offset;
javacall_handle handle;
int bytesRead = -1;
int status = JAVACALL_FAIL;
void* context = NULL;
MidpReentryData* info;
jfieldID connHandleID = NULL;
offset = (int)KNI_GetParameterAsInt(2);
length = (int)KNI_GetParameterAsInt(3);
KNI_StartHandles(3);
KNI_DeclareHandle(arrayHandle);
KNI_DeclareHandle(thisHandle);
KNI_DeclareHandle(classHandle);
KNI_GetThisPointer(thisHandle);
KNI_GetClassPointer(classHandle);
GET_FIELDID(classHandle, "handle", "I", connHandleID)
handle = (javacall_handle)KNI_GetIntField(thisHandle, connHandleID);
KNI_GetParameterAsObject(1, arrayHandle);
REPORT_INFO3(LC_PROTOCOL,
"btl2cap::receive off=%d len=%d handle=%d\n", offset, length, handle);
info = (MidpReentryData*)SNI_GetReentryData(NULL);
// Need revisit: add bluetooth activity indicator
// START_BT_INDICATOR;
if (info == NULL) { /* First invocation */
if (JAVACALL_BT_INVALID_HANDLE == handle) {
KNI_ThrowNew(midpIOException, EXCEPTION_MSG(
"Invalid handle during btl2cap::receive"));
} else {
// Need revisit: add bluetooth activity indicator
// INC_BT_INDICATOR;
SNI_BEGIN_RAW_POINTERS;
status = javacall_bt_l2cap_receive(handle,
(unsigned char*)&(JavaByteArray(arrayHandle)[offset]),
length, &bytesRead);
SNI_END_RAW_POINTERS;
}
} else { /* Reinvocation after unblocking the thread */
if (JAVACALL_BT_INVALID_HANDLE == handle) {
/* closed by another thread */
KNI_ThrowNew(midpInterruptedIOException, EXCEPTION_MSG(
"Interrupted IO error during btl2cap::receive"));
// Need revisit: add bluetooth activity indicator
// DEC_BT_INDICATOR;
} else {
if ((javacall_handle)info->descriptor != handle) {
REPORT_CRIT2(LC_PROTOCOL,
"btl2cap::receive handles mismatched %d != %d\n",
handle, (javacall_handle)info->descriptor);
}
context = info->pResult;
SNI_BEGIN_RAW_POINTERS;
status = javacall_bt_l2cap_receive(handle,
(unsigned char*)&(JavaByteArray(arrayHandle)[offset]),
length, &bytesRead);
SNI_END_RAW_POINTERS;
}
}
REPORT_INFO1(LC_PROTOCOL, "btl2cap::receive bytes=%d\n", bytesRead);
if (JAVACALL_BT_INVALID_HANDLE != handle) {
if (status == JAVACALL_OK) {
// Need revisit: add bluetooth activity indicator
// DEC_BT_INDICATOR;
} else {
char* pError;
javacall_bt_l2cap_get_error(handle, &pError);
REPORT_INFO1(LC_PROTOCOL, "btl2cap::receive (%s)\n", pError);
if (status == JAVACALL_WOULD_BLOCK) {
midp_thread_wait(NETWORK_READ_SIGNAL, (int)handle, context);
} else if (status == JAVACALL_INTERRUPTED) {
char* pError;
javacall_bt_l2cap_get_error(handle, &pError);
midp_snprintf(gKNIBuffer, KNI_BUFFER_SIZE,
"Interrupted IO error during btl2cap::receive (%s)",
pError);
KNI_ThrowNew(midpInterruptedIOException,
EXCEPTION_MSG(gKNIBuffer));
// Need revisit: add bluetooth activity indicator
// DEC_BT_INDICATOR;
} else {
char* pError;
javacall_bt_l2cap_get_error(handle, &pError);
midp_snprintf(gKNIBuffer, KNI_BUFFER_SIZE,
"Unknown error during btl2cap::receive (%s)", pError);
KNI_ThrowNew(midpIOException, EXCEPTION_MSG(gKNIBuffer));
// Need revisit: add bluetooth activity indicator
// DEC_BT_INDICATOR;
}
}
}
// Need revisit: add bluetooth activity indicator
// STOP_BT_INDICATOR;
KNI_EndHandles();
KNI_ReturnInt((jint)bytesRead);
}