CAResult_t CAEDRNativeReadData(JNIEnv *env, uint32_t id)
{
if ((*env)->ExceptionCheck(env))
{
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
OIC_LOG(ERROR, TAG, "env error!!");
return CA_STATUS_FAILED;
}
// check whether this socket object is connected or not.
jobject jni_obj_socket = CAEDRNativeGetDeviceSocket(id);
if (!jni_obj_socket)
{
return CA_STATUS_INVALID_PARAM;
}
// check it whether is still connected or not through google api
jboolean ret = CAEDRIsConnectedForSocket(env, jni_obj_socket);
if (!ret)
{
OIC_LOG(ERROR, TAG, "it is not connected yet.");
// remove socket to list
CAEDRNativeRemoveDeviceSocket(env, jni_obj_socket);
return CA_STATUS_FAILED;
}
// start to read through InputStream
jclass jni_cid_BTsocket = (*env)->FindClass(env, "android/bluetooth/BluetoothSocket");
if (!jni_cid_BTsocket)
{
OIC_LOG(ERROR, TAG, "jni_cid_BTsocket is null");
return CA_STATUS_FAILED;
}
jmethodID jni_mid_getInputStream = (*env)->GetMethodID(env, jni_cid_BTsocket,
"getInputStream",
"()Ljava/io/InputStream;");
jobject jni_obj_inputStream = (*env)->CallObjectMethod(env, jni_obj_socket,
jni_mid_getInputStream);
if (!jni_obj_inputStream)
{
OIC_LOG(ERROR, TAG, "jni_obj_inputStream is null");
(*env)->DeleteLocalRef(env, jni_cid_BTsocket);
return CA_STATUS_FAILED;
}
jclass jni_cid_InputStream = (*env)->FindClass(env, "java/io/InputStream");
if (!jni_cid_InputStream)
{
OIC_LOG(ERROR, TAG, "jni_cid_InputStream is null");
(*env)->DeleteLocalRef(env, jni_obj_inputStream);
(*env)->DeleteLocalRef(env, jni_cid_BTsocket);
return CA_STATUS_FAILED;
}
jmethodID jni_mid_available = (*env)->GetMethodID(env, jni_cid_InputStream,
"available", "()I");
if (!jni_mid_available)
{
OIC_LOG(ERROR, TAG, "jni_mid_available is null");
goto exit;
}
jint available = (*env)->CallIntMethod(env, jni_obj_inputStream, jni_mid_available);
CAConnectedDeviceInfo_t *deviceInfo = NULL;
if (0 < available)
{
jstring jni_str_address = CAEDRNativeGetAddressFromDeviceSocket(env, jni_obj_socket);
if (!jni_str_address)
{
OIC_LOG(ERROR, TAG, "jni_str_address is null");
goto exit;
}
const char* address = (*env)->GetStringUTFChars(env, jni_str_address, NULL);
if (!address)
{
OIC_LOG(ERROR, TAG, "address is null");
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
OIC_LOG_V(DEBUG, TAG, "get InputStream..%d, %s", id, address);
jmethodID jni_mid_read = (*env)->GetMethodID(env, jni_cid_InputStream,
"read", "([BII)I");
if (!jni_mid_read)
{
OIC_LOG(ERROR, TAG, "jni_mid_read is null");
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
deviceInfo = (CAConnectedDeviceInfo_t *) CAEDRGetDeviceInfoFromAddress(address);
if (!deviceInfo)
{
OIC_LOG(ERROR, TAG, "failed to get device info from list");
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
jint bufSize = (deviceInfo->totalDataLen == 0) ?
EDR_MAX_HEADER_LEN : deviceInfo->totalDataLen;
if (!deviceInfo->recvData)
{
deviceInfo->recvData = OICCalloc(1, bufSize);
if (!deviceInfo->recvData)
{
OIC_LOG(ERROR, TAG, "out of memory");
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
}
jbyteArray jbuf = (*env)->NewByteArray(env, (jint) bufSize - deviceInfo->recvDataLen);
if (!jbuf)
{
OIC_LOG(ERROR, TAG, "jbuf is null");
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
jint recvLen = (*env)->CallIntMethod(env, jni_obj_inputStream, jni_mid_read,
jbuf, (jint) 0,
(jint) bufSize - deviceInfo->recvDataLen);
if (-1 == recvLen)
{
OIC_LOG(ERROR, TAG, "recvLen is -1");
(*env)->DeleteLocalRef(env, jbuf);
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
jbyte* buf = (*env)->GetByteArrayElements(env, jbuf, NULL);
if (!buf)
{
OIC_LOG(ERROR, TAG, "buf is null");
(*env)->DeleteLocalRef(env, jbuf);
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
memcpy(deviceInfo->recvData + deviceInfo->recvDataLen, (const char*) buf, recvLen);
deviceInfo->recvDataLen += recvLen;
OIC_LOG(DEBUG, TAG, "read something from InputStream");
if (!deviceInfo->totalDataLen)
{
coap_transport_type transport = coap_get_tcp_header_type_from_initbyte(
((unsigned char *) deviceInfo->recvData)[0] >> 4);
size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
if (deviceInfo->recvData && deviceInfo->recvDataLen >= headerLen)
{
deviceInfo->totalDataLen = coap_get_total_message_length(deviceInfo->recvData,
deviceInfo->recvDataLen);
OIC_LOG_V(DEBUG, TAG, "total data length [%d] bytes", deviceInfo->totalDataLen);
uint8_t *newBuf = OICRealloc(deviceInfo->recvData, deviceInfo->totalDataLen);
if (!newBuf)
{
OIC_LOG(ERROR, TAG, "out of memory");
(*env)->ReleaseByteArrayElements(env, jbuf, buf, 0);
(*env)->DeleteLocalRef(env, jbuf);
(*env)->ReleaseStringUTFChars(env, jni_str_address, address);
(*env)->DeleteLocalRef(env, jni_str_address);
goto exit;
}
deviceInfo->recvData = newBuf;
}
}
static CAResult_t CAReceiveMessage()
{
uint32_t length = u_arraylist_length(caglobals.tcp.svrlist);
size_t i = 0;
unsigned char *recvBuffer = NULL;
CATCPServerInfo_t *svritem = NULL;
for (i = 0; i < length; i++)
{
svritem = (CATCPServerInfo_t *) u_arraylist_get(caglobals.tcp.svrlist, i);
if (svritem->u4tcp.fd < 0)
{
continue;
}
size_t bufSize = TCP_MAX_HEADER_LEN;
recvBuffer = (unsigned char *) OICCalloc(1, bufSize);
if (!recvBuffer)
{
OIC_LOG(ERROR, TAG, "out of memory");
goto exit;
}
bool isHeaderChecked = false;
size_t totalLen = 0;
size_t totalReceivedLen = 0;
do
{
ssize_t recvLen = recv(svritem->u4tcp.fd, recvBuffer + totalReceivedLen,
bufSize - totalReceivedLen, 0);
if (recvLen <= 0)
{
if(EWOULDBLOCK != errno)
{
OIC_LOG_V(ERROR, TAG, "Recvfrom failed %s", strerror(errno));
goto exit;
}
// if received data length is zero, we are breaking loop.
// because we use non-blocking socket to receive data from remote device.
if (!totalReceivedLen)
{
break;
}
continue;
}
totalReceivedLen += recvLen;
if (!isHeaderChecked && totalReceivedLen)
{
coap_transport_type transport = coap_get_tcp_header_type_from_initbyte(
((unsigned char *)recvBuffer)[0] >> 4);
size_t headerLen = coap_get_tcp_header_length_for_transport(transport);
if (totalReceivedLen >= headerLen)
{
// get actual data length from coap over tcp header
totalLen = CAGetTotalLengthFromHeader((unsigned char *) recvBuffer);
bufSize = totalLen;
unsigned char *newBuf = OICRealloc(recvBuffer, bufSize);
if (NULL == newBuf)
{
OIC_LOG(ERROR, TAG, "out of memory");
goto exit;
}
recvBuffer = newBuf;
isHeaderChecked = true;
}
}
if (totalLen == totalReceivedLen)
{
CAEndpoint_t ep = { .adapter = CA_ADAPTER_TCP,
.port = svritem->u4tcp.port };
strncpy(ep.addr, svritem->addr, sizeof(ep.addr));
if (g_packetReceivedCallback)
{
g_packetReceivedCallback(&ep, recvBuffer, totalLen);
}
OIC_LOG_V(DEBUG, TAG, "received data len:%d", totalLen);
break;
}
} while (!totalLen || totalLen > totalReceivedLen);
OICFree(recvBuffer);
}
