/**
* Remove an item from a tree
* @param aTree the list to which the item is to be added
* @param curnode the list item content itself
*/
void* TreeRemoveIndex(Tree* aTree, void* content, int index)
{
Node* curnode = TreeFindContentIndex(aTree, content, index);
if (curnode == NULL)
return NULL;
return TreeRemoveNodeIndex(aTree, curnode, index);
}
void* TreeRemoveKeyIndex(Tree* aTree, void* key, int index)
{
Node* curnode = TreeFindIndex(aTree, key, index);
void* content = NULL;
int i;
if (curnode == NULL)
return NULL;
content = TreeRemoveNodeIndex(aTree, curnode, index);
for (i = 0; i < aTree->indexes; ++i)
{
if (i != index)
content = TreeRemoveIndex(aTree, content, i);
}
return content;
}
/**
* Remove an item from the recorded heap without actually freeing it.
* Use sparingly!
* @param file use the __FILE__ macro to indicate which file this item was allocated in
* @param line use the __LINE__ macro to indicate which line this item was allocated at
* @param p pointer to the item to be removed
*/
static int Internal_heap_unlink(char* file, int line, void* p)
{
Node* e = NULL;
int rc = 0;
e = TreeFind(&heap, ((int*)p)-1);
if (e == NULL)
Log(LOG_ERROR, 13, "Failed to remove heap item at file %s line %d", file, line);
else
{
storageElement* s = (storageElement*)(e->content);
Log(TRACE_MAX, -1, "Freeing %d bytes in heap at file %s line %d, heap use now %d bytes\n",
s->size, file, line, state.current_size);
checkEyecatchers(file, line, p, s->size);
/* free(s->ptr); */
free(s->file);
state.current_size -= s->size;
TreeRemoveNodeIndex(&heap, e, 0);
free(s);
rc = 1;
}
return rc;
}
int MQTTSProtocol_handleConnects(void* pack, int sock, char* clientAddr, Clients* client, uint8_t* wirelessNodeId , uint8_t wirelessNodeIdLen)
{
MQTTS_Connect* connect = (MQTTS_Connect*)pack;
Listener* list = NULL;
int terminate = 0;
Node* elem = NULL;
int rc = 0;
int existingClient = 0;
FUNC_ENTRY;
Log(LOG_PROTOCOL, 39, NULL, sock, clientAddr, client ? client->clientID : "", connect->flags.cleanSession);
if (bstate->clientid_prefixes->count > 0 &&
!ListFindItem(bstate->clientid_prefixes, connect->clientID, clientPrefixCompare))
{
Log(LOG_WARNING, 31, NULL, connect->clientID);
terminate = 1;
}
else
{
list = Socket_getParentListener(sock);
if (list->max_connections > -1 &&
list->connections->count > list->max_connections)
{
/* TODO: why is this commented out? delete if not needed
//MQTTPacket_send_connack(3, sock);
*/
Log(LOG_WARNING, 141, NULL, connect->clientID, list->max_connections, list->port);
terminate = 1;
}
else if (connect->protocolID != 1)
{
Log(LOG_WARNING, 32, NULL, "MQTT-S", connect->protocolID);
/* TODO: why is this commented out? delete if not needed
//MQTTPacket_send_connack(1, sock);
*/
terminate = 1;
}
}
if (terminate)
{
/*TODO: process the terminate*/
MQTTSPacket_free_packet(pack);
goto exit;
}
if (client != NULL && !strcmp(client->clientID, connect->clientID))
{
/* Connect for a new client id on a used addr
* TODO: clean out 'old' Client (that may be 'connected')
*/
}
elem = TreeFindIndex(bstate->mqtts_clients, connect->clientID, 1);
if (elem == NULL)
{
client = TreeRemoveKey(bstate->disconnected_mqtts_clients, connect->clientID);
if (client == NULL) /* this is a totally new connection */
{
/* Brand new client connection */
int i;
client = malloc(sizeof(Clients));
memset(client, '\0', sizeof(Clients));
client->protocol = PROTOCOL_MQTTS;
client->outboundMsgs = ListInitialize();
client->inboundMsgs = ListInitialize();
for (i = 0; i < PRIORITY_MAX; ++i)
client->queuedMsgs[i] = ListInitialize();
client->registrations = ListInitialize();
client->noLocal = 0; /* (connect->version == PRIVATE_PROTOCOL_VERSION) ? 1 : 0; */
client->clientID = connect->clientID;
connect->clientID = NULL; /* don't want to free this space as it is being used in the clients tree below */
// Set Wireless Node ID if exists
if ( wirelessNodeId == NULL)
{
client->wirelessNodeId = NULL ;
client->wirelessNodeIdLen = 0 ;
}
else
{
client->wirelessNodeId = malloc((sizeof(uint8_t) * wirelessNodeIdLen)) ;
memcpy( client->wirelessNodeId , wirelessNodeId , sizeof(uint8_t) * wirelessNodeIdLen) ;
client->wirelessNodeIdLen = wirelessNodeIdLen ;
}
} // // client == NULL
else /* there is an existing disconnected client */
{
/* Reconnect of a disconnected client */
free(client->addr);
client->connect_state = 0;
client->connected = 0; /* Do not connect until we know the connack has been sent */
// Delete Wireless Node ID if exists in existing client
if ( wirelessNodeId == NULL)
{
if ( client->wirelessNodeId != NULL)
free( client->wirelessNodeId ) ;
client->wirelessNodeId = NULL ;
client->wirelessNodeIdLen = 0 ;
}
else
// Replace existing Wireless Node ID with value from current connect packet
{
if ( client->wirelessNodeId != NULL)
free ( client->wirelessNodeId ) ;
client->wirelessNodeId = malloc((sizeof(uint8_t) * wirelessNodeIdLen)) ;
memcpy( client->wirelessNodeId , wirelessNodeId , sizeof(uint8_t) * wirelessNodeIdLen) ;
client->wirelessNodeIdLen = wirelessNodeIdLen ;
}
} // client != NULL
client->good = 1; /* good is set to 0 in disconnect, so we need to reset it here */
client->keepAliveInterval = connect->keepAlive;
client->cleansession = connect->flags.cleanSession;
client->socket = sock;
client->addr = malloc(strlen(clientAddr)+1);
strcpy(client->addr, clientAddr);
TreeAdd(bstate->mqtts_clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List));
if (client->cleansession)
MQTTProtocol_removeAllSubscriptions(client->clientID); /* clear any persistent subscriptions */
if (connect->flags.will)
{
client->connect_state = 1;
rc = MQTTSPacket_send_willTopicReq(client);
}
else
{
client->connected = 1;
rc = MQTTSPacket_send_connack(client, 0); /* send response */
}
}
else
{
/* Reconnect of a connected client */
client = (Clients*)(elem->content);
if (client->connected)
{
Log(LOG_INFO, 34, NULL, connect->clientID, clientAddr);
if (client->socket != sock)
Socket_close(client->socket);
}
client->socket = sock;
client->connected = 0; /* Do not connect until we know the connack has been sent */
client->connect_state = 0;
// Delete Wireless Node ID if exists in existing client
if ( wirelessNodeId == NULL)
{
if ( client->wirelessNodeId != NULL)
free( client->wirelessNodeId ) ;
client->wirelessNodeId = NULL ;
client->wirelessNodeIdLen = 0 ;
}
else
// Replace existing Wireless Node ID with value from current connect packet
{
if ( client->wirelessNodeId != NULL)
free ( client->wirelessNodeId ) ;
client->wirelessNodeId = malloc((sizeof(uint8_t) * wirelessNodeIdLen)) ;
memcpy( client->wirelessNodeId , wirelessNodeId , sizeof(uint8_t) * wirelessNodeIdLen) ;
client->wirelessNodeIdLen = wirelessNodeIdLen ;
}
client->good = 1;
if (client->addr != NULL)
free(client->addr);
client->addr = malloc(strlen(clientAddr)+1);
strcpy(client->addr, clientAddr);
client->cleansession = connect->flags.cleanSession;
if (client->cleansession)
{
int i;
MQTTProtocol_removeAllSubscriptions(client->clientID);
/* empty pending message lists */
MQTTProtocol_emptyMessageList(client->outboundMsgs);
MQTTProtocol_emptyMessageList(client->inboundMsgs);
for (i = 0; i < PRIORITY_MAX; ++i)
MQTTProtocol_emptyMessageList(client->queuedMsgs[i]);
MQTTProtocol_clearWill(client);
}
/* registrations are always cleared */
MQTTSProtocol_emptyRegistrationList(client->registrations);
/* have to remove and re-add client so it is in the right order for new socket */
if (client->socket != sock)
{
TreeRemoveNodeIndex(bstate->mqtts_clients, elem, 1);
TreeRemoveKeyIndex(bstate->mqtts_clients, &client->socket, 0);
client->socket = sock;
TreeAdd(bstate->mqtts_clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List));
}
client->keepAliveInterval = connect->keepAlive;
client->pendingRegistration = NULL;
#if !defined(NO_BRIDGE)
client->pendingSubscription = NULL;
#endif
if (connect->flags.will)
{
client->connect_state = 1;
rc = MQTTSPacket_send_willTopicReq(client);
}
else
{
client->connected = 1;
rc = MQTTSPacket_send_connack(client,0); /* send response */
}
}
if (existingClient)
MQTTProtocol_processQueued(client);
Log(LOG_INFO, 0, "Client connected to udp port %d from %s (%s)", list->port, client->clientID, clientAddr);
MQTTSPacket_free_packet(pack);
time( &(client->lastContact) );
exit:
FUNC_EXIT_RC(rc);
return rc;
}
/**
* Process an incoming connect packet for a socket
* @param pack pointer to the connect packet
* @param sock the socket on which the packet was received
* @return completion code
*/
int MQTTProtocol_handleConnects(void* pack, int sock, Clients* client)
{
Connect* connect = (Connect*)pack;
Node* elem = NULL;
int terminate = 0;
int rc = TCPSOCKET_COMPLETE;
#if !defined(SINGLE_LISTENER)
Listener* listener = Socket_getParentListener(sock);
#endif
FUNC_ENTRY;
Log(LOG_PROTOCOL, 26, NULL, sock, connect->clientID);/*
connect->Protocol, connect->flags.bits.cleanstart, connect->keepAliveTimer,
connect->version, connect->username, connect->password);*/
Socket_removeNew(sock);
if (bstate->state != BROKER_RUNNING)
terminate = 1; /* don't accept new connection requests when we are shutting down */
/* Now check the version. If we don't recognize it we will not have parsed the packet,
* so nothing else in the packet structure will have been filled in.
*/
else if (!MQTTPacket_checkVersion(pack))
{
Log(LOG_WARNING, 32, NULL, connect->Protocol, connect->version);
rc = MQTTPacket_send_connack(CONNACK_UNACCEPTABLE_PROTOCOL_VERSION, sock, Socket_getpeer(sock)); /* send response */
terminate = 1;
}
else if (connect->clientID[0] == '\0' || (connect->version == 3 && strlen(connect->clientID) > 23))
{
rc = MQTTPacket_send_connack(CONNACK_IDENTIFIER_REJECTED, sock, Socket_getpeer(sock)); /* send response */
terminate = 1;
}
else if (bstate->password_file != NULL)
{
if (connect->flags.bits.username && connect->flags.bits.password &&
(Users_authenticate(connect->username, connect->password) == false))
{
Log(LOG_WARNING, 31, NULL, connect->clientID);
rc = MQTTPacket_send_connack(CONNACK_BAD_USERNAME_OR_PASSWORD, sock, connect->clientID); /* send bad user/pass response */
terminate = 1;
}
else if ((!connect->flags.bits.username || !connect->flags.bits.password) && !bstate->allow_anonymous)
{
Log(LOG_WARNING, 31, NULL, connect->clientID);
rc = MQTTPacket_send_connack(CONNACK_BROKER_UNAVAILABLE, sock, connect->clientID); /* send broker unavailable response */
terminate = 1;
}
}
if (terminate)
;
else if (bstate->clientid_prefixes->count > 0 &&
!ListFindItem(bstate->clientid_prefixes, connect->clientID, clientPrefixCompare))
{
Log(LOG_WARNING, 31, NULL, connect->clientID);
terminate = 1;
}
else
{
#if !defined(SINGLE_LISTENER)
if (listener->max_connections > -1 &&
listener->connections->count > listener->max_connections)
{
Log(LOG_WARNING, 141, NULL, connect->clientID, listener->max_connections, listener->port);
#else
if (bstate->max_connections > -1 &&
MQTTProtocol_getNoConnectedClients() >= bstate->max_connections)
{
Log(LOG_WARNING, 141, NULL, connect->clientID, bstate->max_connections, bstate->port);
#endif
rc = MQTTPacket_send_connack(CONNACK_BROKER_UNAVAILABLE, sock, connect->clientID); /* send response */
terminate = 1;
}
}
if (terminate)
{
MQTTPacket_freeConnect(connect);
Socket_close(sock);
rc = TCPSOCKET_COMPLETE;
goto exit;
}
if (bstate->connection_messages)
Log(LOG_INFO,
#if !defined(SINGLE_LISTENER)
33, NULL, listener->port, connect->clientID, Socket_getpeer(sock));
#else
33, NULL, bstate->port, connect->clientID, Socket_getpeer(sock));
#endif
elem = TreeFindIndex(bstate->clients, connect->clientID, 1);
if (elem == NULL)
{
client = TreeRemoveKey(bstate->disconnected_clients, connect->clientID);
if (client == NULL)
{
int i;
char* tmpAddr = NULL;
client = malloc(sizeof(Clients));
memset(client, '\0', sizeof(Clients));
tmpAddr = Socket_getpeer(sock);
client->addr = malloc(strlen(tmpAddr)+1);
strcpy(client->addr, tmpAddr);
#if defined(MQTTS)
client->protocol = PROTOCOL_MQTT;
#endif
client->clientID = connect->clientID;
client->outboundMsgs = ListInitialize();
client->inboundMsgs = ListInitialize();
for (i = 0; i < PRIORITY_MAX; ++i)
client->queuedMsgs[i] = ListInitialize();
connect->clientID = NULL; /* don't want to free this space as it is being used in the client structure */
}
client->socket = sock;
TreeAdd(bstate->clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List));
}
else
{
client = (Clients*)(elem->content);
if (client->connected)
{
Log(LOG_INFO, 34, NULL, connect->clientID, Socket_getpeer(sock));
if (client->socket != sock)
Socket_close(client->socket);
}
if (connect->flags.bits.cleanstart)
{
int i;
/* empty pending message lists */
MQTTProtocol_emptyMessageList(client->outboundMsgs);
MQTTProtocol_emptyMessageList(client->inboundMsgs);
for (i = 0; i < PRIORITY_MAX; ++i)
MQTTProtocol_emptyMessageList(client->queuedMsgs[i]);
client->msgID = client->outbound = client->ping_outstanding = 0;
}
/* have to remove and re-add client so it is in the right order for new socket */
if (client->socket != sock)
{
TreeRemoveNodeIndex(bstate->clients, elem, 1);
TreeRemoveKeyIndex(bstate->clients, &client->socket, 0);
client->socket = sock;
TreeAdd(bstate->clients, client, sizeof(Clients) + strlen(client->clientID)+1 + 3*sizeof(List));
}
}
client->good = client->connected = 1;
client->cleansession = connect->flags.bits.cleanstart;
client->keepAliveInterval = connect->keepAliveTimer;
client->noLocal = (connect->version == PRIVATE_PROTOCOL_VERSION) ? 1 : 0;
if (client->cleansession)
MQTTProtocol_removeAllSubscriptions(client->clientID); /* clear any persistent subscriptions */
#if !defined(SINGLE_LISTENER)
if (listener && listener->mount_point && connect->flags.bits.will)
{
char* temp = malloc(strlen(connect->willTopic) + strlen(listener->mount_point) + 1);
strcpy(temp, listener->mount_point);
strcat(temp, connect->willTopic);
free(connect->willTopic);
connect->willTopic = temp;
}
#endif
#if defined(MQTTS)
if (connect->flags.bits.will)
{
MQTTProtocol_setWillTopic(client, connect->willTopic,
connect->flags.bits.willRetain, connect->flags.bits.willQoS);
MQTTProtocol_setWillMsg(client, connect->willMsg);
connect->willTopic = NULL;
connect->willMsg = NULL;
}
#else
MQTTProtocol_setWill(connect, client);
#endif
if (connect->flags.bits.username)
{
client->user = Users_get_user(connect->username);
}
rc = MQTTPacket_send_connack(CONNACK_CONNECTION_ACCEPTED, sock, client->clientID); /* send response */
if (client->cleansession == 0)
{
ListElement* outcurrent = NULL;
time_t now = 0;
/* ensure that inflight messages are retried now by setting the last touched time
* to very old (0) before calling the retry function
*/
time(&(now));
while (ListNextElement(client->outboundMsgs, &outcurrent))
{
Messages* m = (Messages*)(outcurrent->content);
m->lastTouch = 0;
}
MQTTProtocol_retries(now, client);
MQTTProtocol_processQueued(client);
}
time(&(client->lastContact));
MQTTPacket_freeConnect(connect);
exit:
FUNC_EXIT_RC(rc);
return rc;
}
/**
* Process an incoming ping request packet for a socket
* @param pack pointer to the publish packet
* @param sock the socket on which the packet was received
* @return completion code
*/
int MQTTProtocol_handlePingreqs(void* pack, int sock, Clients* client)
{
int rc = TCPSOCKET_COMPLETE;
FUNC_ENTRY;
Log(LOG_PROTOCOL, 3, NULL, sock, client->clientID);
rc = MQTTPacket_send_pingresp(sock, client->clientID);
FUNC_EXIT_RC(rc);
return rc;
}