int MQTTUnsubscribe (Client *c, const char *topicFilter)
{
int rc = FAILURE;
int len = 0;
Timer timer;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char*) topicFilter;
InitTimer (&timer);
countdown_ms (&timer, c->command_timeout_ms);
if (!c->isconnected)
goto exit;
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &timer)) != SUCCESS) // send the subscribe packet
goto exit; // there was a problem
if (waitfor(c, UNSUBACK, &timer) == UNSUBACK)
{
unsigned short mypacketid; // should be the same as the packetid above
if (MQTTDeserialize_unsuback(&mypacketid, c->readbuf, c->readbuf_size) == 1)
rc = 0;
}
else rc = FAILURE; // timed out - no UNSUBACK received
exit:
return rc;
}
int MQTTUnsubscribe(MQTTClient* c, const char* topicFilter)
{
int rc = FAILURE;
Timer timer;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char *)topicFilter;
int len = 0;
#if defined(MQTT_TASK)
FreeRTOS_MutexLock(&c->mutex);
#endif
if (!c->isconnected)
goto exit;
TimerInit(&timer);
TimerCountdownMS(&timer, c->command_timeout_ms);
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &timer)) != SUCCESS) // send the subscribe packet
goto exit; // there was a problem
if (waitfor(c, UNSUBACK, &timer) == UNSUBACK) {
unsigned short mypacketid; // should be the same as the packetid above
if (MQTTDeserialize_unsuback(&mypacketid, c->readbuf, c->readbuf_size) == 1)
rc = 0;
} else
rc = FAILURE;
exit:
#if defined(MQTT_TASK)
FreeRTOS_MutexUnlock(&c->mutex);
#endif
return rc;
}
int MQTTUnsubscribe(MQTTClient* c, const char* topicFilter)
{
int rc = MQTT_FAILURE;
Timer timer;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char *)topicFilter;
int len = 0;
platform_mutex_lock(&c->mutex);
if (!c->isconnected)
goto exit;
platform_timer_init(&timer);
platform_timer_countdown(&timer, c->command_timeout_ms);
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &timer)) != MQTT_SUCCESS) // send the subscribe packet
goto exit; // there was a problem
if (waitfor(c, UNSUBACK, &timer) == UNSUBACK)
{
unsigned short mypacketid; // should be the same as the packetid above
if (MQTTDeserialize_unsuback(&mypacketid, c->readbuf, c->readbuf_size) == 1)
rc = 0;
}
else
{
rc = MQTT_CONNECTION_LOST;
}
exit:
platform_mutex_unlock(&c->mutex);
return rc;
}
int MQTTUnsubscribe(MQTTClient *c, const char *topicFilter)
{
int rc = FAILURE;
Timer timer;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char *)topicFilter;
int len = 0;
#if defined(MQTT_TASK)
MutexLock(&c->mutex);
#endif
if (!c->isconnected) {
goto exit;
}
TimerInit(&timer);
TimerCountdownMS(&timer, c->command_timeout_ms);
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0) {
goto exit;
}
if ((rc = sendPacket(c, len, &timer)) != SUCCESS) { // send the subscribe packet
goto exit; // there was a problem
}
if (waitfor(c, UNSUBACK, &timer) == UNSUBACK) {
unsigned short mypacketid; // should be the same as the packetid above
if (MQTTDeserialize_unsuback(&mypacketid, c->readbuf, c->readbuf_size) == 1) {
/* remove the subscription message handler associated with this topic, if there is one */
MQTTSetMessageHandler(c, topicFilter, NULL);
}
} else {
rc = FAILURE;
}
exit:
if (rc == FAILURE) {
MQTTCloseSession(c);
}
#if defined(MQTT_TASK)
MutexUnlock(&c->mutex);
#endif
return rc;
}
int MQTTUnsubscribe(Client* c, const char* topicFilter)
{
int rc = FAILURE;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char *)topicFilter;
int len = 0;
if (!c->isconnected)
goto exit;
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0)
goto exit;
if ((rc = sendPacket_ev(c, len)) != SUCCESS) // send the subscribe packet
goto exit; // there was a problem
exit:
return rc;
}
int MQTTUnsubscribe(Client* c, const char* topicFilter)
{
int rc = FAILURE;
Timer timer;
MQTTString topic = MQTTString_initializer;
topic.cstring = (char *)topicFilter;
int len = 0;
int i=0;
InitTimer(&timer);
countdown_ms(&timer, c->command_timeout_ms);
if (!c->isconnected)
goto exit;
if ((len = MQTTSerialize_unsubscribe(c->buf, c->buf_size, 0, getNextPacketId(c), 1, &topic)) <= 0)
goto exit;
if ((rc = sendPacket(c, len, &timer)) != SUCCESS) // send the unsubscribe packet
goto exit; // there was a problem
if (waitfor(c, UNSUBACK, &timer) == UNSUBACK)
{
unsigned short mypacketid; // should be the same as the packetid above
if (MQTTDeserialize_unsuback(&mypacketid, c->readbuf, c->readbuf_size) == 1){
for (i = 0; i < MAX_MESSAGE_HANDLERS; ++i){
if (c->messageHandlers[i].topicFilter != 0 && (strcmp(c->messageHandlers[i].topicFilter, topicFilter)==0)){
c->messageHandlers[i].topicFilter = 0;
// We dont want to break here, if the same topic is registered with 2 callbacks. Unlikeley scenario.
}
}
rc = 0;
}
}
else
rc = FAILURE;
exit:
DeInitTimer(&timer); //STM: added this line
return rc;
}
int mqttClient_unsubscribe(mqttClient_t* clientData, const char* topicFilter)
{
MQTTString topic = MQTTString_initializer;
int rc = LE_OK;
LE_ASSERT(clientData);
if (!clientData->session.isConnected)
{
LE_WARN("not connected");
goto cleanup;
}
topic.cstring = (char *)topicFilter;
int len = MQTTSerialize_unsubscribe(clientData->session.tx.buf, sizeof(clientData->session.tx.buf), 0, mqttClient_getNextPacketId(clientData), 1, &topic);
if (len <= 0)
{
LE_ERROR("MQTTSerialize_unsubscribe() failed(%d)", len);
rc = LE_BAD_PARAMETER;
goto cleanup;
}
rc = mqttClient_write(clientData, len);
if (rc)
{
LE_ERROR("mqttClient_write() failed(%d)", rc);
goto cleanup;
}
rc = le_timer_Start(clientData->session.cmdTimer);
if (rc)
{
LE_ERROR("le_timer_Start() failed(%d)", rc);
goto cleanup;
}
cleanup:
return rc;
}
