/**
* Internal publication to a system topic.
* @param topic the topic to publish on
* @param string the data to publish
*/
void MQTTProtocol_sys_publish(char* topic, char* string)
{
List* rpl = NULL;
int doPublish = 1;
FUNC_ENTRY;
rpl = SubscriptionEngines_getRetained(bstate->se, topic);
if (rpl->count > 0) /* this should be at most 1, as we must use a non-wildcard topic (for publishing) */
{
RetainedPublications* rp = (RetainedPublications*)(rpl->first->content);
if (strlen(string) == rp->payloadlen && memcmp(rp->payload, string, rp->payloadlen) == 0)
doPublish = 0;
}
ListFreeNoContent(rpl);
if (doPublish)
{
Publish publish;
publish.header.byte = 0;
publish.header.bits.retain = 1;
publish.payload = string;
publish.payloadlen = strlen(string);
publish.topic = topic;
MQTTProtocol_handlePublishes(&publish, 0, NULL);
}
FUNC_EXIT;
}
/**
* Process retained messages (when a client subscribes)
* @param client the client to send the messages to
* @param topic the topic to match
* @param qos the QoS of the subscription
*/
void MQTTProtocol_processRetaineds(Clients* client, char* topic, int qos, int priority)
{
List* rpl = NULL;
ListElement* currp = NULL;
#if defined(QOS0_SEND_LIMIT)
int qos0count = 0;
#endif
FUNC_ENTRY;
rpl = SubscriptionEngines_getRetained(bstate->se, topic);
while (ListNextElement(rpl, &currp))
{
int curqos;
Publish publish;
Messages* p = NULL;
RetainedPublications* rp = (RetainedPublications*)(currp->content);
publish.payload = rp->payload;
publish.payloadlen = rp->payloadlen;
publish.topic = rp->topicName;
curqos = (rp->qos < qos) ? rp->qos : qos;
#if defined(QOS0_SEND_LIMIT)
if (curqos == 0)
++qos0count;
if (qos0count > bstate->max_inflight_messages) /* a somewhat arbitrary criterion */
{
if (MQTTProtocol_queuePublish(client, &publish, curqos, 1, priority, &p) == SOCKET_ERROR)
break;
}
else
{
#endif
if (Protocol_startOrQueuePublish(client, &publish, curqos, 1, priority, &p) == SOCKET_ERROR)
break;
#if defined(QOS0_SEND_LIMIT)
}
#endif
}
ListFreeNoContent(rpl);
FUNC_EXIT;
}
int MQTTClient_unsubscribeMany(MQTTClient handle, int count, char* const* topic)
{
MQTTClients* m = handle;
List* topics = ListInitialize();
int i = 0;
int rc = SOCKET_ERROR;
int msgid = 0;
FUNC_ENTRY;
Thread_lock_mutex(mqttclient_mutex);
if (m == NULL || m->c == NULL)
{
rc = MQTTCLIENT_FAILURE;
goto exit;
}
if (m->c->connected == 0)
{
rc = MQTTCLIENT_DISCONNECTED;
goto exit;
}
for (i = 0; i < count; i++)
{
if (!UTF8_validateString(topic[i]))
{
rc = MQTTCLIENT_BAD_UTF8_STRING;
goto exit;
}
}
if ((msgid = MQTTProtocol_assignMsgId(m->c)) == 0)
{
rc = MQTTCLIENT_MAX_MESSAGES_INFLIGHT;
goto exit;
}
for (i = 0; i < count; i++)
ListAppend(topics, topic[i], strlen(topic[i]));
rc = MQTTProtocol_unsubscribe(m->c, topics, msgid);
ListFreeNoContent(topics);
if (rc == TCPSOCKET_COMPLETE)
{
MQTTPacket* pack = NULL;
Thread_unlock_mutex(mqttclient_mutex);
pack = MQTTClient_waitfor(handle, UNSUBACK, &rc, 10000L);
Thread_lock_mutex(mqttclient_mutex);
if (pack != NULL)
{
rc = MQTTProtocol_handleUnsubacks(pack, m->c->net.socket);
m->pack = NULL;
}
else
rc = SOCKET_ERROR;
}
if (rc == SOCKET_ERROR)
{
Thread_unlock_mutex(mqttclient_mutex);
MQTTClient_disconnect_internal(handle, 0);
Thread_lock_mutex(mqttclient_mutex);
}
exit:
Thread_unlock_mutex(mqttclient_mutex);
FUNC_EXIT_RC(rc);
return rc;
}
int MQTTClient_subscribeMany(MQTTClient handle, int count, char* const* topic, int* qos)
{
MQTTClients* m = handle;
List* topics = ListInitialize();
List* qoss = ListInitialize();
int i = 0;
int rc = MQTTCLIENT_FAILURE;
int msgid = 0;
FUNC_ENTRY;
Thread_lock_mutex(mqttclient_mutex);
if (m == NULL || m->c == NULL)
{
rc = MQTTCLIENT_FAILURE;
goto exit;
}
if (m->c->connected == 0)
{
rc = MQTTCLIENT_DISCONNECTED;
goto exit;
}
for (i = 0; i < count; i++)
{
if (!UTF8_validateString(topic[i]))
{
rc = MQTTCLIENT_BAD_UTF8_STRING;
goto exit;
}
if(qos[i] < 0 || qos[i] > 2)
{
rc = MQTTCLIENT_BAD_QOS;
goto exit;
}
}
if ((msgid = MQTTProtocol_assignMsgId(m->c)) == 0)
{
rc = MQTTCLIENT_MAX_MESSAGES_INFLIGHT;
goto exit;
}
for (i = 0; i < count; i++)
{
ListAppend(topics, topic[i], strlen(topic[i]));
ListAppend(qoss, &qos[i], sizeof(int));
}
rc = MQTTProtocol_subscribe(m->c, topics, qoss, msgid);
ListFreeNoContent(topics);
ListFreeNoContent(qoss);
if (rc == TCPSOCKET_COMPLETE)
{
MQTTPacket* pack = NULL;
Thread_unlock_mutex(mqttclient_mutex);
pack = MQTTClient_waitfor(handle, SUBACK, &rc, 10000L);
Thread_lock_mutex(mqttclient_mutex);
if (pack != NULL)
{
Suback* sub = (Suback*)pack;
ListElement* current = NULL;
i = 0;
while (ListNextElement(sub->qoss, ¤t))
{
int* reqqos = (int*)(current->content);
qos[i++] = *reqqos;
}
rc = MQTTProtocol_handleSubacks(pack, m->c->net.socket);
m->pack = NULL;
}
else
rc = SOCKET_ERROR;
}
if (rc == SOCKET_ERROR)
{
Thread_unlock_mutex(mqttclient_mutex);
MQTTClient_disconnect_internal(handle, 0);
Thread_lock_mutex(mqttclient_mutex);
}
else if (rc == TCPSOCKET_COMPLETE)
rc = MQTTCLIENT_SUCCESS;
exit:
Thread_unlock_mutex(mqttclient_mutex);
FUNC_EXIT_RC(rc);
return rc;
}
int MQTTClient_subscribeMany(MQTTClient handle, int count, char** topic, int* qos)
{
MQTTClients* m = handle;
List* topics = ListInitialize();
List* qoss = ListInitialize();
int i = 0;
int rc = MQTTCLIENT_FAILURE;
FUNC_ENTRY;
Thread_lock_mutex(mqttclient_mutex);
if (m == NULL || m->c == NULL)
{
rc = MQTTCLIENT_FAILURE;
goto exit;
}
if (m->c->connected == 0)
{
rc = MQTTCLIENT_DISCONNECTED;
goto exit;
}
for (i = 0; i < count; i++)
{
if (!UTF8_validateString(topic[i]))
{
rc = MQTTCLIENT_BAD_UTF8_STRING;
goto exit;
}
}
for (i = 0; i < count; i++)
{
ListAppend(topics, topic[i], strlen(topic[i]));
ListAppend(qoss, &qos[i], sizeof(int));
}
rc = MQTTProtocol_subscribe(m->c, topics, qoss);
ListFreeNoContent(topics);
ListFreeNoContent(qoss);
if (rc == TCPSOCKET_COMPLETE)
{
MQTTPacket* pack = NULL;
Thread_unlock_mutex(mqttclient_mutex);
pack = MQTTClient_waitfor(handle, SUBACK, &rc, 10000L);
Thread_lock_mutex(mqttclient_mutex);
if (pack != NULL)
{
rc = MQTTProtocol_handleSubacks(pack, m->c->socket);
m->pack = NULL;
}
else
rc = SOCKET_ERROR;
}
if (rc == SOCKET_ERROR)
{
Thread_unlock_mutex(mqttclient_mutex);
MQTTClient_disconnect_internal(handle, 0);
Thread_lock_mutex(mqttclient_mutex);
}
else if (rc == TCPSOCKET_COMPLETE)
rc = MQTTCLIENT_SUCCESS;
exit:
Thread_unlock_mutex(mqttclient_mutex);
FUNC_EXIT_RC(rc);
return rc;
}
