int MQTTSProtocol_handleSubscribes(void* pack, int sock, char* clientAddr, Clients* client)
{
int rc = 0;
MQTTS_Subscribe* sub = (MQTTS_Subscribe*)pack;
int isnew;
int topicId = 0;
char* topicName = NULL , *preDefinedTopicName = NULL;
FUNC_ENTRY;
Log(LOG_PROTOCOL, 67, NULL, sock, clientAddr, client ? client->clientID : "",
sub->msgId,
(sub->flags.QoS == 3) ? -1: sub->flags.QoS,
sub->flags.topicIdType);
// NORMAL (topic name is in subscribe packet) or SHORT topic name
if (sub->flags.topicIdType == MQTTS_TOPIC_TYPE_NORMAL || sub->flags.topicIdType == MQTTS_TOPIC_TYPE_SHORT)
{
topicName = sub->topicName;
sub->topicName = NULL;
}
// Pre-defined topic
else if (sub->flags.topicIdType == MQTTS_TOPIC_TYPE_PREDEFINED && client != NULL && sub->topicId != 0)
{
char *name = MQTTSProtocol_getPreRegisteredTopicName(client, sub->topicId) ;
if (name) {
preDefinedTopicName = MQTTSProtocol_replaceTopicNamePlaceholders(client , name ) ;
}
topicName = preDefinedTopicName ;
topicId = sub->topicId;
}
// If topic name not found send SubAck with Rejected - Invalid topic ID
if (topicName == NULL)
rc = MQTTSPacket_send_subAck(client, sub, 0, sub->flags.QoS, MQTTS_RC_REJECTED_INVALID_TOPIC_ID);
else
{
if (sub->flags.topicIdType == MQTTS_TOPIC_TYPE_NORMAL && !Topics_hasWildcards(topicName))
{
char* regTopicName = malloc(strlen(topicName)+1);
strcpy(regTopicName, topicName);
topicId = (MQTTSProtocol_registerTopic(client, regTopicName))->id;
}
isnew = SubscriptionEngines_subscribe(bstate->se, client->clientID,
topicName, sub->flags.QoS, client->noLocal, (client->cleansession == 0), PRIORITY_NORMAL);
if ( (rc = MQTTSPacket_send_subAck(client, sub, topicId, sub->flags.QoS, MQTTS_RC_ACCEPTED)) == 0)
if ((client->noLocal == 0) || isnew)
MQTTProtocol_processRetaineds(client, topicName,sub->flags.QoS, PRIORITY_NORMAL);
}
time( &(client->lastContact) );
MQTTSPacket_free_packet(pack);
if (preDefinedTopicName)
free (preDefinedTopicName);
FUNC_EXIT_RC(rc);
return rc;
}
/**
* Originates a new publication - sends it to all clients subscribed.
* @param publish pointer to a stucture which contains all the publication information
* @param originator the originating client
*/
void Protocol_processPublication(Publish* publish, char* originator)
{
Messages* stored = NULL; /* to avoid duplication of data where possible */
List* clients;
ListElement* current = NULL;
int savedMsgId = publish->msgId;
int clean_needed = 0;
FUNC_ENTRY;
if (Topics_hasWildcards(publish->topic))
{
Log(LOG_INFO, 12, NULL, publish->topic, originator);
goto exit;
}
if ((strcmp(INTERNAL_CLIENTID, originator) != 0) && bstate->password_file && bstate->acl_file)
{
Clients* client = (Clients*)(TreeFindIndex(bstate->clients, originator, 1)->content);
if (Users_authorise(client->user, publish->topic, ACL_WRITE) == false)
{
Log(LOG_AUDIT, 149, NULL, originator, publish->topic);
goto exit;
}
}
if (publish->header.bits.retain)
{
SubscriptionEngines_setRetained(bstate->se, publish->topic, publish->header.bits.qos, publish->payload, publish->payloadlen);
if (bstate->persistence == 1 && bstate->autosave_on_changes == 1 && bstate->autosave_interval > 0
&& bstate->se->retained_changes >= bstate->autosave_interval)
{
Log(LOG_INFO, 100, NULL, bstate->autosave_interval);
SubscriptionEngines_save(bstate->se);
}
}
clients = SubscriptionEngines_getSubscribers(bstate->se, publish->topic, originator);
if (strncmp(publish->topic, "$SYS/client/", 12) == 0)
{ /* default subscription for a client */
Node* node = TreeFindIndex(bstate->clients, &publish->topic[12], 1);
if (node == NULL)
node = TreeFind(bstate->disconnected_clients, &publish->topic[12]);
if (node && node->content)
{
Subscriptions* rcs = malloc(sizeof(Subscriptions));
rcs->clientName = &publish->topic[12];
rcs->qos = 2;
rcs->priority = PRIORITY_NORMAL;
rcs->topicName = publish->topic;
ListAppend(clients, rcs, sizeof(Subscriptions));
}
}
current = NULL;
while (ListNextElement(clients, ¤t))
{
Node* curnode = NULL;
unsigned int qos = ((Subscriptions*)(current->content))->qos;
int priority = ((Subscriptions*)(current->content))->priority;
char* clientName = ((Subscriptions*)(current->content))->clientName;
if (publish->header.bits.qos < qos) /* reduce qos if > subscribed qos */
qos = publish->header.bits.qos;
if ((curnode = TreeFindIndex(bstate->clients, clientName, 1)) == NULL)
curnode = TreeFind(bstate->disconnected_clients, clientName);
#if defined(MQTTS)
if (curnode == NULL && ((curnode = TreeFindIndex(bstate->mqtts_clients, clientName, 1)) == NULL))
curnode = TreeFind(bstate->disconnected_mqtts_clients, clientName);
#endif
if (curnode)
{
Clients* pubclient = (Clients*)(curnode->content);
int retained = 0;
Messages* saved = NULL;
char* original_topic = publish->topic;
#if !defined(NO_BRIDGE)
if (pubclient->outbound || pubclient->noLocal)
{
retained = publish->header.bits.retain; /* outbound and noLocal mean outward/inward bridge client,
so keep retained flag */
if (pubclient->outbound)
{
Bridge_handleOutbound(pubclient, publish);
if (publish->topic != original_topic)
{ /* handleOutbound has changed the topic, so we musn't used the stored pub which
contains the original topic */
saved = stored;
stored = NULL;
}
}
}
#endif
if (Protocol_startOrQueuePublish(pubclient, publish, qos, retained, priority, &stored) == SOCKET_ERROR)
{
pubclient->good = pubclient->connected = 0; /* flag this client as needing to be cleaned up */
clean_needed = 1;
}
if (publish->topic != original_topic)
{
stored = saved; /* restore the stored pointer for the next loop iteration */
free(publish->topic);
publish->topic = original_topic;
}
}
}
publish->msgId = savedMsgId;
/* INTERNAL_CLIENTID means that we are publishing data to the log,
and we don't want to interfere with other close processing */
if (clean_needed && strcmp(originator, INTERNAL_CLIENTID) != 0)
MQTTProtocol_clean_clients(bstate->clients);
ListFree(clients);
exit:
FUNC_EXIT;
}
