uint16_t mqtt_get_id(uint8_t* buffer, uint16_t length)
{
if(length < 1)
return 0;
switch(mqtt_get_type(buffer))
{
case MQTT_MSG_TYPE_PUBLISH:
{
int i;
int topiclen;
for(i = 1; i < length; ++i)
{
if((buffer[i] & 0x80) == 0)
{
++i;
break;
}
}
if(i + 2 >= length)
return 0;
topiclen = buffer[i++] << 8;
topiclen |= buffer[i++];
if(i + topiclen >= length)
return 0;
i += topiclen;
if(mqtt_get_qos(buffer) > 0)
{
if(i + 2 >= length)
return 0;
}
else
return 0;
return (buffer[i] << 8) | buffer[i + 1];
}
case MQTT_MSG_TYPE_PUBACK:
case MQTT_MSG_TYPE_PUBREC:
case MQTT_MSG_TYPE_PUBREL:
case MQTT_MSG_TYPE_PUBCOMP:
case MQTT_MSG_TYPE_SUBACK:
case MQTT_MSG_TYPE_UNSUBACK:
case MQTT_MSG_TYPE_SUBSCRIBE:
{
// This requires the remaining length to be encoded in 1 byte,
// which it should be.
if(length >= 4 && (buffer[1] & 0x80) == 0)
return (buffer[2] << 8) | buffer[3];
else
return 0;
}
default:
return 0;
}
}
/**
* @brief Send out top message in queue onto socket
*/
static void ICACHE_FLASH_ATTR
mqtt_send_message(MQTT_Client* client) {
//DBG_MQTT("MQTT: Send_message\n");
PktBuf *buf = client->msgQueue;
if (buf == NULL || client->sending) return; // ahem...
client->msgQueue = PktBuf_Shift(client->msgQueue);
// get some details about the message
uint16_t msg_type = mqtt_get_type(buf->data);
uint8_t msg_id = mqtt_get_id(buf->data, buf->filled);
msg_id = msg_id;
#ifdef MQTT_DBG
os_printf("MQTT: Send type=%s id=%04X len=%d\n", mqtt_msg_type[msg_type], msg_id, buf->filled);
#if 0
for (int i=0; i<buf->filled; i++) {
if (buf->data[i] >= ' ' && buf->data[i] <= '~') os_printf("%c", buf->data[i]);
else os_printf("\\x%02X", buf->data[i]);
}
os_printf("\n");
#endif
#endif
// send the message out
if (client->security)
espconn_secure_sent(client->pCon, buf->data, buf->filled);
else
espconn_sent(client->pCon, buf->data, buf->filled);
client->sending = true;
// depending on whether it needs an ack we need to hold on to the message
bool needsAck =
(msg_type == MQTT_MSG_TYPE_PUBLISH && mqtt_get_qos(buf->data) > 0) ||
msg_type == MQTT_MSG_TYPE_PUBREL || msg_type == MQTT_MSG_TYPE_PUBREC ||
msg_type == MQTT_MSG_TYPE_SUBSCRIBE || msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE ||
msg_type == MQTT_MSG_TYPE_PINGREQ;
if (msg_type == MQTT_MSG_TYPE_PINGREQ) {
client->pending_buffer = NULL; // we don't need to rexmit this one
client->sending_buffer = buf;
} else if (needsAck) {
client->pending_buffer = buf; // remeber for rexmit on disconnect/reconnect
client->sending_buffer = NULL;
client->timeoutTick = client->sendTimeout+1; // +1 to ensure full sendTireout seconds
} else {
client->pending_buffer = NULL;
client->sending_buffer = buf;
client->timeoutTick = 0;
}
client->keepAliveTick = client->connect_info.keepalive > 0 ? client->connect_info.keepalive+1 : 0;
}
const char* mqtt_get_publish_data(uint8_t* buffer, uint16_t* length)
{
int i;
int totlen = 0;
int topiclen;
for(i = 1; i < *length; ++i)
{
totlen += (buffer[i] & 0x7f) << (7 * (i - 1));
if((buffer[i] & 0x80) == 0)
{
++i;
break;
}
}
totlen += i;
if(i + 2 >= *length)
return NULL;
topiclen = buffer[i++] << 8;
topiclen |= buffer[i++];
if(i + topiclen >= *length)
{
*length = 0;
return NULL;
}
i += topiclen;
if(mqtt_get_qos(buffer) > 0)
{
if(i + 2 >= *length)
return NULL;
i += 2;
}
if(totlen < i)
return NULL;
if(totlen <= *length)
*length = totlen - i;
else
*length = *length - i;
return (const char*)(buffer + i);
}
/**
* @brief Client received callback function.
* @param arg: contain the ip link information
* @param pdata: received data
* @param len: the lenght of received data
* @retval None
*/
void ICACHE_FLASH_ATTR
mqtt_tcpclient_recv(void *arg, char *pdata, unsigned short len)
{
INFO("TCP: data received %d bytes\r\n", len);
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
struct espconn *pCon = (struct espconn*)arg;
MQTT_Client *client = (MQTT_Client *)pCon->reverse;
if(len > MQTT_BUF_SIZE || len == 0)
{
INFO("receive length is invalid.\n");
return;
}
os_memcpy(client->mqtt_state.in_buffer + client->mqtt_state.message_length_read, pdata, len);
client->mqtt_state.message_length_read += len;
READPACKET:
if(client->mqtt_state.message_length_read == 1)
{
INFO("not enough data for read package length.\n!");
return;
}
client->mqtt_state.message_length = mqtt_get_total_length(client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
INFO("message length:%d\n", client->mqtt_state.message_length);
show_package(client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
if(client->mqtt_state.message_length > client->mqtt_state.message_length_read)
{
INFO("not enough data.\n");
return;
}
msg_type = mqtt_get_type(client->mqtt_state.in_buffer);
msg_qos = mqtt_get_qos(client->mqtt_state.in_buffer);
msg_id = mqtt_get_id(client->mqtt_state.in_buffer, client->mqtt_state.message_length);
INFO("client->connstate:%d, type:%d, Qos:%d, id:%d, message length:%d\n", client->connState, msg_type, msg_qos, \
msg_id, client->mqtt_state.message_length);
switch(client->connState)
{
case MQTT_CONNECT_SENDING:
if(msg_type == MQTT_MSG_TYPE_CONNACK)
{
if(client->mqtt_state.pending_msg_type != MQTT_MSG_TYPE_CONNECT)
{
INFO("MQTT: Invalid packet\r\n");
if(client->security)
{
espconn_secure_disconnect(client->pCon);
}
else
{
espconn_disconnect(client->pCon);
}
}
else
{
INFO("MQTT: Connected to %s:%d\r\n", client->host, client->port);
client->connState = MQTT_DATA;
if(client->connectedCb)
client->connectedCb((uint32_t*)client);
}
}
break;
case MQTT_DATA:
switch(msg_type)
{
case MQTT_MSG_TYPE_SUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_SUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
INFO("MQTT: Subscribe successful\r\n");
break;
case MQTT_MSG_TYPE_UNSUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
INFO("MQTT: UnSubscribe successful\r\n");
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1)
client->mqtt_state.outbound_message = mqtt_msg_puback(&client->mqtt_state.mqtt_connection, msg_id);
else if(msg_qos == 2)
client->mqtt_state.outbound_message = mqtt_msg_pubrec(&client->mqtt_state.mqtt_connection, msg_id);
if(msg_qos == 1 || msg_qos == 2)
{
INFO("MQTT: Queue response QoS: %d\r\n", msg_qos);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data,\
client->mqtt_state.outbound_message->length) == -1)
{
INFO("MQTT: Queue full\r\n");
}
}
show_package(client->mqtt_state.in_buffer, client->mqtt_state.message_length);
deliver_publish(client, client->mqtt_state.in_buffer, client->mqtt_state.message_length);
break;
case MQTT_MSG_TYPE_PUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id)
{
INFO("MQTT: received MQTT_MSG_TYPE_PUBACK, finish QoS1 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREC:
client->mqtt_state.outbound_message = mqtt_msg_pubrel(&client->mqtt_state.mqtt_connection, msg_id);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1)
{
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREL:
client->mqtt_state.outbound_message = mqtt_msg_pubcomp(&client->mqtt_state.mqtt_connection, msg_id);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1)
{
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBCOMP:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id)
{
INFO("MQTT: receive MQTT_MSG_TYPE_PUBCOMP, finish QoS2 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PINGREQ:
client->mqtt_state.outbound_message = mqtt_msg_pingresp(&client->mqtt_state.mqtt_connection);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1)
{
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PINGRESP:
INFO("receive a heart beat response!\n");
client->heart_beat_flag = 1;
break;
}
break;
}
// process package adhesive.
uint16_t remain_length = client->mqtt_state.message_length_read - client->mqtt_state.message_length;
client->mqtt_state.message_length_read = remain_length;
INFO("client->mqtt_state.message_length_read = %d\n", client->mqtt_state.message_length_read);
INFO("client->mqtt_state.message_length = %d\n", client->mqtt_state.message_length);
INFO("the package is\n");
show_package(client->mqtt_state.in_buffer, client->mqtt_state.message_length);
if(remain_length > 0)
{
int i = 0;
for(i = 0; i< remain_length; i++)
{
client->mqtt_state.in_buffer[i] = \
client->mqtt_state.in_buffer[client->mqtt_state.message_length_read - remain_length + i];
}
INFO("Get another published message\r\n");
goto READPACKET;
}
system_os_post(MQTT_TASK_PRIO, 0, (os_param_t)client);
}
/**
* @brief Client received callback function.
* @param arg: contain the ip link information
* @param pdata: received data
* @param len: the lenght of received data
* @retval None
*/
void ICACHE_FLASH_ATTR
mqtt_tcpclient_recv(void *arg, char *pdata, unsigned short len)
{
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
struct espconn *pCon = (struct espconn*)arg;
MQTT_Client *client = (MQTT_Client *)pCon->reverse;
READPACKET:
INFO("TCP: data received %d bytes\r\n", len);
if(len < MQTT_BUF_SIZE && len > 0){
os_memcpy(client->mqtt_state.in_buffer, pdata, len);
msg_type = mqtt_get_type(client->mqtt_state.in_buffer);
msg_qos = mqtt_get_qos(client->mqtt_state.in_buffer);
msg_id = mqtt_get_id(client->mqtt_state.in_buffer, client->mqtt_state.in_buffer_length);
switch(client->connState){
case MQTT_CONNECT_SENDING:
if(msg_type == MQTT_MSG_TYPE_CONNACK){
if(client->mqtt_state.pending_msg_type != MQTT_MSG_TYPE_CONNECT){
INFO("MQTT: Invalid packet\r\n");
if(client->security){
espconn_secure_disconnect(client->pCon);
}
else {
espconn_disconnect(client->pCon);
}
} else {
INFO("MQTT: Connected to %s:%d\r\n", client->host, client->port);
client->connState = MQTT_DATA;
if(client->connectedCb)
client->connectedCb((uint32_t*)client);
}
}
break;
case MQTT_DATA:
client->mqtt_state.message_length_read = len;
client->mqtt_state.message_length = mqtt_get_total_length(client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
switch(msg_type)
{
case MQTT_MSG_TYPE_SUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_SUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
INFO("MQTT: Subscribe successful\r\n");
break;
case MQTT_MSG_TYPE_UNSUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
INFO("MQTT: UnSubscribe successful\r\n");
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1)
client->mqtt_state.outbound_message = mqtt_msg_puback(&client->mqtt_state.mqtt_connection, msg_id);
else if(msg_qos == 2)
client->mqtt_state.outbound_message = mqtt_msg_pubrec(&client->mqtt_state.mqtt_connection, msg_id);
if(msg_qos == 1 || msg_qos == 2){
INFO("MQTT: Queue response QoS: %d\r\n", msg_qos);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1){
INFO("MQTT: Queue full\r\n");
}
}
deliver_publish(client, client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
break;
case MQTT_MSG_TYPE_PUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id){
INFO("MQTT: received MQTT_MSG_TYPE_PUBACK, finish QoS1 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREC:
client->mqtt_state.outbound_message = mqtt_msg_pubrel(&client->mqtt_state.mqtt_connection, msg_id);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1){
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREL:
client->mqtt_state.outbound_message = mqtt_msg_pubcomp(&client->mqtt_state.mqtt_connection, msg_id);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1){
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PUBCOMP:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id){
INFO("MQTT: receive MQTT_MSG_TYPE_PUBCOMP, finish QoS2 publish\r\n");
}
break;
case MQTT_MSG_TYPE_PINGREQ:
client->mqtt_state.outbound_message = mqtt_msg_pingresp(&client->mqtt_state.mqtt_connection);
if(QUEUE_Puts(&client->msgQueue, client->mqtt_state.outbound_message->data, client->mqtt_state.outbound_message->length) == -1){
INFO("MQTT: Queue full\r\n");
}
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
break;
}
// NOTE: this is done down here and not in the switch case above
// because the PSOCK_READBUF_LEN() won't work inside a switch
// statement due to the way protothreads resume.
if(msg_type == MQTT_MSG_TYPE_PUBLISH)
{
len = client->mqtt_state.message_length_read;
if(client->mqtt_state.message_length < client->mqtt_state.message_length_read)
{
//client->connState = MQTT_PUBLISH_RECV;
//Not Implement yet
len -= client->mqtt_state.message_length;
pdata += client->mqtt_state.message_length;
INFO("Get another published message\r\n");
goto READPACKET;
}
}
break;
}
} else {
INFO("ERROR: Message too long\r\n");
}
system_os_post(MQTT_TASK_PRIO, 0, (os_param_t)client);
}
/**
* @brief Client received callback function.
* @param arg: contain the ip link information
* @param pdata: received data
* @param len: the lenght of received data
* @retval None
*/
void ICACHE_FLASH_ATTR
mqtt_tcpclient_recv(void *arg, char *pdata, unsigned short len)
{
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
struct espconn *pCon = (struct espconn*)arg;
MQTT_Client *client = (MQTT_Client *)pCon->reverse;
//spam INFO("TCP: data received\r\n");
if(len < MQTT_BUF_SIZE && len > 0){
memcpy(client->mqtt_state.in_buffer, pdata, len);
switch(client->connState){
case MQTT_CONNECT_SENDING:
if(mqtt_get_type(client->mqtt_state.in_buffer) != MQTT_MSG_TYPE_CONNACK){
//spam INFO("MQTT: Invalid packet\r\n");
if(client->security){
espconn_secure_disconnect(client->pCon);
}
else {
espconn_disconnect(client->pCon);
}
} else {
//spam INFO("MQTT: Connected to %s:%d\r\n", client->host, client->port);
client->connState = MQTT_DATA;
if(client->connectedCb)
client->connectedCb((uint32_t*)client);
}
break;
case MQTT_DATA:
client->mqtt_state.message_length_read = len;
client->mqtt_state.message_length = mqtt_get_total_length(client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
msg_type = mqtt_get_type(client->mqtt_state.in_buffer);
msg_qos = mqtt_get_qos(client->mqtt_state.in_buffer);
msg_id = mqtt_get_id(client->mqtt_state.in_buffer, client->mqtt_state.in_buffer_length);
switch(msg_type)
{
case MQTT_MSG_TYPE_SUBACK:
//spam if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_SUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
//spam INFO("MQTT: Subscribe successful to %s:%d\r\n", client->host, client->port);
break;
case MQTT_MSG_TYPE_UNSUBACK:
//spam if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && client->mqtt_state.pending_msg_id == msg_id)
//spam INFO("MQTT: UnSubscribe successful\r\n");
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1)
client->mqtt_state.outbound_message = mqtt_msg_puback(&client->mqtt_state.mqtt_connection, msg_id);
else if(msg_qos == 2)
client->mqtt_state.outbound_message = mqtt_msg_pubrec(&client->mqtt_state.mqtt_connection, msg_id);
deliver_publish(client, client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
break;
case MQTT_MSG_TYPE_PUBACK:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id){
//spam INFO("MQTT: Publish successful\r\n");
if(client->publishedCb)
client->publishedCb((uint32_t*)client);
}
break;
case MQTT_MSG_TYPE_PUBREC:
client->mqtt_state.outbound_message = mqtt_msg_pubrel(&client->mqtt_state.mqtt_connection, msg_id);
break;
case MQTT_MSG_TYPE_PUBREL:
client->mqtt_state.outbound_message = mqtt_msg_pubcomp(&client->mqtt_state.mqtt_connection, msg_id);
break;
case MQTT_MSG_TYPE_PUBCOMP:
if(client->mqtt_state.pending_msg_type == MQTT_MSG_TYPE_PUBLISH && client->mqtt_state.pending_msg_id == msg_id){
//spam INFO("MQTT: Public successful\r\n");
if(client->publishedCb)
client->publishedCb((uint32_t*)client);
}
break;
case MQTT_MSG_TYPE_PINGREQ:
client->mqtt_state.outbound_message = mqtt_msg_pingresp(&client->mqtt_state.mqtt_connection);
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
break;
}
// NOTE: this is done down here and not in the switch case above
// because the PSOCK_READBUF_LEN() won't work inside a switch
// statement due to the way protothreads resume.
if(msg_type == MQTT_MSG_TYPE_PUBLISH)
{
uint16_t len;
// adjust message_length and message_length_read so that
// they only account for the publish data and not the rest of the
// message, this is done so that the offset passed with the
// continuation event is the offset within the publish data and
// not the offset within the message as a whole.
len = client->mqtt_state.message_length_read;
mqtt_get_publish_data(client->mqtt_state.in_buffer, &len);
len = client->mqtt_state.message_length_read - len;
client->mqtt_state.message_length -= len;
client->mqtt_state.message_length_read -= len;
if(client->mqtt_state.message_length_read < client->mqtt_state.message_length)
{
//client->connState = MQTT_PUBLISH_RECV;
}
}
break;
case MQTT_PUBLISH_RECV:
/*
* Long publish message, not implement yet
* TODO: Implement method used deliver_publish_continuation
*/
break;
}
}
system_os_post(MQTT_TASK_PRIO, 0, (os_param_t)client);
}
static PT_THREAD(handle_mqtt_connection(mqtt_state_t* state))
{
static struct etimer keepalive_timer;
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
PSOCK_BEGIN(&state->ps);
// Initialise and send CONNECT message
mqtt_msg_init(&state->mqtt_connection, state->out_buffer, state->out_buffer_length);
state->outbound_message = mqtt_msg_connect(&state->mqtt_connection, state->connect_info);
PSOCK_SEND(&state->ps, state->outbound_message->data, state->outbound_message->length);
state->outbound_message = NULL;
// Wait for CONACK message
PSOCK_READBUF_LEN(&state->ps, 2);
if(mqtt_get_type(state->in_buffer) != MQTT_MSG_TYPE_CONNACK)
PSOCK_CLOSE_EXIT(&state->ps);
// Tell the client we're connected
mqtt_flags |= MQTT_FLAG_CONNECTED;
complete_pending(state, MQTT_EVENT_TYPE_CONNECTED);
// Setup the keep alive timer and enter main message processing loop
etimer_set(&keepalive_timer, CLOCK_SECOND * state->connect_info->keepalive);
while(1)
{
// Wait for something to happen:
// new incoming data,
// new outgoing data,
// keep alive timer expired
PSOCK_WAIT_UNTIL(&state->ps, PSOCK_NEWDATA(&state->ps) ||
state->outbound_message != NULL ||
etimer_expired(&keepalive_timer));
// If there's a new message waiting to go out, then send it
if(state->outbound_message != NULL)
{
PSOCK_SEND(&state->ps, state->outbound_message->data, state->outbound_message->length);
state->outbound_message = NULL;
// If it was a PUBLISH message with QoS-0 then tell the client it's done
if(state->pending_msg_type == MQTT_MSG_TYPE_PUBLISH && state->pending_msg_id == 0)
complete_pending(state, MQTT_EVENT_TYPE_PUBLISHED);
// Reset the keepalive timer as we've just sent some data
etimer_restart(&keepalive_timer);
continue;
}
// If the keep-alive timer expired then prepare a ping for sending
// and reset the timer
if(etimer_expired(&keepalive_timer))
{
state->outbound_message = mqtt_msg_pingreq(&state->mqtt_connection);
etimer_reset(&keepalive_timer);
continue;
}
// If we get here we must have woken for new incoming data,
// read and process it.
PSOCK_READBUF_LEN(&state->ps, 2);
state->message_length_read = PSOCK_DATALEN(&state->ps);
state->message_length = mqtt_get_total_length(state->in_buffer, state->message_length_read);
msg_type = mqtt_get_type(state->in_buffer);
msg_qos = mqtt_get_qos(state->in_buffer);
msg_id = mqtt_get_id(state->in_buffer, state->in_buffer_length);
switch(msg_type)
{
case MQTT_MSG_TYPE_SUBACK:
if(state->pending_msg_type == MQTT_MSG_TYPE_SUBSCRIBE && state->pending_msg_id == msg_id)
complete_pending(state, MQTT_EVENT_TYPE_SUBSCRIBED);
break;
case MQTT_MSG_TYPE_UNSUBACK:
if(state->pending_msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && state->pending_msg_id == msg_id)
complete_pending(state, MQTT_EVENT_TYPE_UNSUBSCRIBED);
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1)
state->outbound_message = mqtt_msg_puback(&state->mqtt_connection, msg_id);
else if(msg_qos == 2)
state->outbound_message = mqtt_msg_pubrec(&state->mqtt_connection, msg_id);
deliver_publish(state, state->in_buffer, state->message_length_read);
break;
case MQTT_MSG_TYPE_PUBACK:
if(state->pending_msg_type == MQTT_MSG_TYPE_PUBLISH && state->pending_msg_id == msg_id)
complete_pending(state, MQTT_EVENT_TYPE_PUBLISHED);
break;
case MQTT_MSG_TYPE_PUBREC:
state->outbound_message = mqtt_msg_pubrel(&state->mqtt_connection, msg_id);
break;
case MQTT_MSG_TYPE_PUBREL:
state->outbound_message = mqtt_msg_pubcomp(&state->mqtt_connection, msg_id);
break;
case MQTT_MSG_TYPE_PUBCOMP:
if(state->pending_msg_type == MQTT_MSG_TYPE_PUBLISH && state->pending_msg_id == msg_id)
complete_pending(state, MQTT_EVENT_TYPE_PUBLISHED);
break;
case MQTT_MSG_TYPE_PINGREQ:
state->outbound_message = mqtt_msg_pingresp(&state->mqtt_connection);
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
break;
}
// NOTE: this is done down here and not in the switch case above
// because the PSOCK_READBUF_LEN() won't work inside a switch
// statement due to the way protothreads resume.
if(msg_type == MQTT_MSG_TYPE_PUBLISH)
{
uint16_t len;
// adjust message_length and message_length_read so that
// they only account for the publish data and not the rest of the
// message, this is done so that the offset passed with the
// continuation event is the offset within the publish data and
// not the offset within the message as a whole.
len = state->message_length_read;
mqtt_get_publish_data(state->in_buffer, &len);
len = state->message_length_read - len;
state->message_length -= len;
state->message_length_read -= len;
while(state->message_length_read < state->message_length)
{
PSOCK_READBUF_LEN(&state->ps, state->message_length - state->message_length_read);
deliver_publish_continuation(state, state->message_length_read, state->in_buffer, PSOCK_DATALEN(&state->ps));
state->message_length_read += PSOCK_DATALEN(&state->ps);
}
}
}
PSOCK_END(&state->ps);
}
void mqtt_socket_timer(void *arg)
{
NODE_DBG("enter mqtt_socket_timer.\n");
lmqtt_userdata *mud = (lmqtt_userdata*) arg;
if(mud == NULL)
return;
if(mud->pesp_conn == NULL){
NODE_DBG("mud->pesp_conn is NULL.\n");
os_timer_disarm(&mud->mqttTimer);
return;
}
NODE_DBG("timer, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
if(mud->event_timeout > 0){
NODE_DBG("event_timeout: %d.\n", mud->event_timeout);
mud->event_timeout --;
if(mud->event_timeout > 0){
return;
} else {
NODE_DBG("event timeout. \n");
if(mud->connState == MQTT_DATA)
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
// should remove the head of the queue and re-send with DUP = 1
// Not implemented yet.
}
}
if(mud->connState == MQTT_INIT){ // socket connect time out.
NODE_DBG("Can not connect to broker.\n");
// Never goes here.
} else if(mud->connState == MQTT_CONNECT_SENDING){ // MQTT_CONNECT send time out.
NODE_DBG("sSend MQTT_CONNECT failed.\n");
mud->connState = MQTT_INIT;
if(mud->secure)
espconn_secure_disconnect(mud->pesp_conn);
else
espconn_disconnect(mud->pesp_conn);
mud->keep_alive_tick = 0; // not need count anymore
} else if(mud->connState == MQTT_CONNECT_SENT){ // wait for CONACK time out.
NODE_DBG("MQTT_CONNECT failed.\n");
} else if(mud->connState == MQTT_DATA){
msg_queue_t *pending_msg = msg_peek(&(mud->mqtt_state.pending_msg_q));
if(pending_msg){
mud->event_timeout = MQTT_SEND_TIMEOUT;
if(mud->secure)
espconn_secure_sent(mud->pesp_conn, pending_msg->msg.data, pending_msg->msg.length);
else
espconn_sent(mud->pesp_conn, pending_msg->msg.data, pending_msg->msg.length);
mud->keep_alive_tick = 0;
NODE_DBG("id: %d - qos: %d, length: %d\n", pending_msg->msg_id, pending_msg->publish_qos, pending_msg->msg.length);
} else {
// no queued event.
mud->keep_alive_tick ++;
if(mud->keep_alive_tick > mud->mqtt_state.connect_info->keepalive){
mud->event_timeout = MQTT_SEND_TIMEOUT;
uint8_t temp_buffer[MQTT_BUF_SIZE];
mqtt_msg_init(&mud->mqtt_state.mqtt_connection, temp_buffer, MQTT_BUF_SIZE);
NODE_DBG("\r\nMQTT: Send keepalive packet\r\n");
mqtt_message_t* temp_msg = mqtt_msg_pingreq(&mud->mqtt_state.mqtt_connection);
msg_queue_t *node = msg_enqueue( &(mud->mqtt_state.pending_msg_q), temp_msg,
0, MQTT_MSG_TYPE_PINGREQ, (int)mqtt_get_qos(temp_msg->data) );
// only one message in queue, send immediately.
if(mud->secure)
espconn_secure_sent(mud->pesp_conn, temp_msg->data, temp_msg->length);
else
espconn_sent(mud->pesp_conn, temp_msg->data, temp_msg->length);
mud->keep_alive_tick = 0;
}
}
}
NODE_DBG("leave mqtt_socket_timer.\n");
}
static void mqtt_socket_received(void *arg, char *pdata, unsigned short len)
{
NODE_DBG("enter mqtt_socket_received.\n");
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
msg_queue_t *node = NULL;
int length = (int)len;
// uint8_t in_buffer[MQTT_BUF_SIZE];
uint8_t *in_buffer = (uint8_t *)pdata;
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
READPACKET:
if(length > MQTT_BUF_SIZE || length <= 0)
return;
// c_memcpy(in_buffer, pdata, length);
uint8_t temp_buffer[MQTT_BUF_SIZE];
mqtt_msg_init(&mud->mqtt_state.mqtt_connection, temp_buffer, MQTT_BUF_SIZE);
mqtt_message_t *temp_msg = NULL;
switch(mud->connState){
case MQTT_CONNECT_SENDING:
case MQTT_CONNECT_SENT:
if(mqtt_get_type(in_buffer) != MQTT_MSG_TYPE_CONNACK){
NODE_DBG("MQTT: Invalid packet\r\n");
mud->connState = MQTT_INIT;
if(mud->secure)
espconn_secure_disconnect(pesp_conn);
else
espconn_disconnect(pesp_conn);
} else {
mud->connState = MQTT_DATA;
NODE_DBG("MQTT: Connected\r\n");
if(mud->cb_connect_ref == LUA_NOREF)
break;
if(mud->self_ref == LUA_NOREF)
break;
if(mud->L == NULL)
break;
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->cb_connect_ref);
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata(client) to callback func in lua
lua_call(mud->L, 1, 0);
break;
}
break;
case MQTT_DATA:
mud->mqtt_state.message_length_read = length;
mud->mqtt_state.message_length = mqtt_get_total_length(in_buffer, mud->mqtt_state.message_length_read);
msg_type = mqtt_get_type(in_buffer);
msg_qos = mqtt_get_qos(in_buffer);
msg_id = mqtt_get_id(in_buffer, mud->mqtt_state.message_length);
msg_queue_t *pending_msg = msg_peek(&(mud->mqtt_state.pending_msg_q));
NODE_DBG("MQTT_DATA: type: %d, qos: %d, msg_id: %d, pending_id: %d\r\n",
msg_type,
msg_qos,
msg_id,
(pending_msg)?pending_msg->msg_id:0);
switch(msg_type)
{
case MQTT_MSG_TYPE_SUBACK:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_SUBSCRIBE && pending_msg->msg_id == msg_id){
NODE_DBG("MQTT: Subscribe successful\r\n");
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
if (mud->cb_suback_ref == LUA_NOREF)
break;
if (mud->self_ref == LUA_NOREF)
break;
if(mud->L == NULL)
break;
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->cb_suback_ref);
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->self_ref);
lua_call(mud->L, 1, 0);
}
break;
case MQTT_MSG_TYPE_UNSUBACK:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && pending_msg->msg_id == msg_id){
NODE_DBG("MQTT: UnSubscribe successful\r\n");
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
}
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1){
temp_msg = mqtt_msg_puback(&mud->mqtt_state.mqtt_connection, msg_id);
node = msg_enqueue(&(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_PUBACK, (int)mqtt_get_qos(temp_msg->data) );
}
else if(msg_qos == 2){
temp_msg = mqtt_msg_pubrec(&mud->mqtt_state.mqtt_connection, msg_id);
node = msg_enqueue(&(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_PUBREC, (int)mqtt_get_qos(temp_msg->data) );
}
if(msg_qos == 1 || msg_qos == 2){
NODE_DBG("MQTT: Queue response QoS: %d\r\n", msg_qos);
}
deliver_publish(mud, in_buffer, mud->mqtt_state.message_length);
break;
case MQTT_MSG_TYPE_PUBACK:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_PUBLISH && pending_msg->msg_id == msg_id){
NODE_DBG("MQTT: Publish with QoS = 1 successful\r\n");
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
if(mud->cb_puback_ref == LUA_NOREF)
break;
if(mud->self_ref == LUA_NOREF)
break;
if(mud->L == NULL)
break;
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_call(mud->L, 1, 0);
}
break;
case MQTT_MSG_TYPE_PUBREC:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_PUBLISH && pending_msg->msg_id == msg_id){
NODE_DBG("MQTT: Publish with QoS = 2 Received PUBREC\r\n");
// Note: actrually, should not destroy the msg until PUBCOMP is received.
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
temp_msg = mqtt_msg_pubrel(&mud->mqtt_state.mqtt_connection, msg_id);
node = msg_enqueue(&(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_PUBREL, (int)mqtt_get_qos(temp_msg->data) );
NODE_DBG("MQTT: Response PUBREL\r\n");
}
break;
case MQTT_MSG_TYPE_PUBREL:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_PUBREC && pending_msg->msg_id == msg_id){
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
temp_msg = mqtt_msg_pubcomp(&mud->mqtt_state.mqtt_connection, msg_id);
node = msg_enqueue(&(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_PUBCOMP, (int)mqtt_get_qos(temp_msg->data) );
NODE_DBG("MQTT: Response PUBCOMP\r\n");
}
break;
case MQTT_MSG_TYPE_PUBCOMP:
if(pending_msg && pending_msg->msg_type == MQTT_MSG_TYPE_PUBREL && pending_msg->msg_id == msg_id){
NODE_DBG("MQTT: Publish with QoS = 2 successful\r\n");
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
if(mud->cb_puback_ref == LUA_NOREF)
break;
if(mud->self_ref == LUA_NOREF)
break;
if(mud->L == NULL)
break;
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
lua_rawgeti(mud->L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_call(mud->L, 1, 0);
}
break;
case MQTT_MSG_TYPE_PINGREQ:
temp_msg = mqtt_msg_pingresp(&mud->mqtt_state.mqtt_connection);
node = msg_enqueue(&(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_PINGRESP, (int)mqtt_get_qos(temp_msg->data) );
NODE_DBG("MQTT: Response PINGRESP\r\n");
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
NODE_DBG("MQTT: PINGRESP received\r\n");
break;
}
// NOTE: this is done down here and not in the switch case above
// because the PSOCK_READBUF_LEN() won't work inside a switch
// statement due to the way protothreads resume.
if(msg_type == MQTT_MSG_TYPE_PUBLISH)
{
length = mud->mqtt_state.message_length_read;
if(mud->mqtt_state.message_length < mud->mqtt_state.message_length_read)
{
length -= mud->mqtt_state.message_length;
in_buffer += mud->mqtt_state.message_length;
NODE_DBG("Get another published message\r\n");
goto READPACKET;
}
}
break;
}
if(node && (1==msg_size(&(mud->mqtt_state.pending_msg_q))) && mud->event_timeout == 0){
mud->event_timeout = MQTT_SEND_TIMEOUT;
NODE_DBG("Sent: %d\n", node->msg.length);
if( mud->secure )
espconn_secure_sent( pesp_conn, node->msg.data, node->msg.length );
else
espconn_sent( pesp_conn, node->msg.data, node->msg.length );
}
mud->keep_alive_tick = 0;
NODE_DBG("receive, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
NODE_DBG("leave mqtt_socket_received.\n");
return;
}
// Lua: bool = mqtt:subscribe(topic, qos, function())
static int mqtt_socket_subscribe( lua_State* L ) {
NODE_DBG("enter mqtt_socket_subscribe.\n");
uint8_t stack = 1, qos = 0;
uint16_t msg_id = 0;
const char *topic;
size_t il;
lmqtt_userdata *mud;
mud = (lmqtt_userdata *) luaL_checkudata( L, stack, "mqtt.socket" );
luaL_argcheck( L, mud, stack, "mqtt.socket expected" );
stack++;
if(mud==NULL){
NODE_DBG("userdata is nil.\n");
lua_pushboolean(L, 0);
return 1;
}
if(mud->pesp_conn == NULL){
NODE_DBG("mud->pesp_conn is NULL.\n");
lua_pushboolean(L, 0);
return 1;
}
if(!mud->connected){
luaL_error( L, "not connected" );
lua_pushboolean(L, 0);
return 1;
}
uint8_t temp_buffer[MQTT_BUF_SIZE];
mqtt_msg_init(&mud->mqtt_state.mqtt_connection, temp_buffer, MQTT_BUF_SIZE);
mqtt_message_t *temp_msg = NULL;
if( lua_istable( L, stack ) ) {
NODE_DBG("subscribe table\n");
lua_pushnil( L ); /* first key */
uint8_t temp_buf[MQTT_BUF_SIZE];
uint32_t temp_pos = 0;
while( lua_next( L, stack ) != 0 ) {
topic = luaL_checkstring( L, -2 );
qos = luaL_checkinteger( L, -1 );
temp_msg = mqtt_msg_subscribe( &mud->mqtt_state.mqtt_connection, topic, qos, &msg_id );
NODE_DBG("topic: %s - qos: %d, length: %d\n", topic, qos, temp_msg->length);
if (temp_pos + temp_msg->length > MQTT_BUF_SIZE){
lua_pop(L, 1);
break; // too long message for the outbuffer.
}
c_memcpy( temp_buf + temp_pos, temp_msg->data, temp_msg->length );
temp_pos += temp_msg->length;
lua_pop( L, 1 );
}
if (temp_pos == 0){
luaL_error( L, "invalid data" );
lua_pushboolean(L, 0);
return 1;
}
c_memcpy( temp_buffer, temp_buf, temp_pos );
temp_msg->data = temp_buffer;
temp_msg->length = temp_pos;
stack++;
} else {
NODE_DBG("subscribe string\n");
topic = luaL_checklstring( L, stack, &il );
stack++;
if( topic == NULL ){
luaL_error( L, "need topic name" );
lua_pushboolean(L, 0);
return 1;
}
qos = luaL_checkinteger( L, stack );
temp_msg = mqtt_msg_subscribe( &mud->mqtt_state.mqtt_connection, topic, qos, &msg_id );
stack++;
}
if( lua_type( L, stack ) == LUA_TFUNCTION || lua_type( L, stack ) == LUA_TLIGHTFUNCTION ) { // TODO: this will overwrite the previous one.
lua_pushvalue( L, stack ); // copy argument (func) to the top of stack
if( mud->cb_suback_ref != LUA_NOREF )
luaL_unref( L, LUA_REGISTRYINDEX, mud->cb_suback_ref );
mud->cb_suback_ref = luaL_ref( L, LUA_REGISTRYINDEX );
}
msg_queue_t *node = msg_enqueue( &(mud->mqtt_state.pending_msg_q), temp_msg,
msg_id, MQTT_MSG_TYPE_SUBSCRIBE, (int)mqtt_get_qos(temp_msg->data) );
NODE_DBG("topic: %s - id: %d - qos: %d, length: %d\n", topic, node->msg_id, node->publish_qos, node->msg.length);
if(node && (1==msg_size(&(mud->mqtt_state.pending_msg_q))) && mud->event_timeout == 0){
mud->event_timeout = MQTT_SEND_TIMEOUT;
NODE_DBG("Sent: %d\n", node->msg.length);
if( mud->secure )
espconn_secure_sent( mud->pesp_conn, node->msg.data, node->msg.length );
else
espconn_sent( mud->pesp_conn, node->msg.data, node->msg.length );
mud->keep_alive_tick = 0;
}
if(!node){
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1); // enqueued succeed.
}
NODE_DBG("subscribe, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
NODE_DBG("leave mqtt_socket_subscribe.\n");
return 1;
}
/**
* @brief Client received callback function.
* @param arg: contain the ip link information
* @param pdata: received data
* @param len: the length of received data
* @retval None
*/
static void ICACHE_FLASH_ATTR
mqtt_tcpclient_recv(void* arg, char* pdata, unsigned short len) {
//os_printf("MQTT: recv CB\n");
uint8_t msg_type;
uint16_t msg_id;
uint16_t msg_len;
struct espconn* pCon = (struct espconn*)arg;
MQTT_Client* client = (MQTT_Client *)pCon->reverse;
if (client == NULL) return; // aborted connection
//os_printf("MQTT: Data received %d bytes\n", len);
do {
// append data to our buffer
int avail = client->in_buffer_size - client->in_buffer_filled;
if (len <= avail) {
os_memcpy(client->in_buffer + client->in_buffer_filled, pdata, len);
client->in_buffer_filled += len;
len = 0;
} else {
os_memcpy(client->in_buffer + client->in_buffer_filled, pdata, avail);
client->in_buffer_filled += avail;
len -= avail;
pdata += avail;
}
// check out what's at the head of the buffer
msg_type = mqtt_get_type(client->in_buffer);
msg_id = mqtt_get_id(client->in_buffer, client->in_buffer_size);
msg_len = mqtt_get_total_length(client->in_buffer, client->in_buffer_size);
if (msg_len > client->in_buffer_size) {
// oops, too long a message for us to digest, disconnect and hope for a miracle
os_printf("MQTT: Too long a message (%d bytes)\n", msg_len);
mqtt_doAbort(client);
return;
}
// check whether what's left in the buffer is a complete message
if (msg_len > client->in_buffer_filled) break;
if (client->connState != MQTT_CONNECTED) {
// why are we receiving something??
DBG_MQTT("MQTT ERROR: recv in invalid state %d\n", client->connState);
mqtt_doAbort(client);
return;
}
// we are connected and are sending/receiving data messages
uint8_t pending_msg_type = 0;
uint16_t pending_msg_id = 0;
if (client->pending_buffer != NULL) {
pending_msg_type = mqtt_get_type(client->pending_buffer->data);
pending_msg_id = mqtt_get_id(client->pending_buffer->data, client->pending_buffer->filled);
}
DBG_MQTT("MQTT: Recv type=%s id=%04X len=%d; Pend type=%s id=%02X\n",
mqtt_msg_type[msg_type], msg_id, msg_len, mqtt_msg_type[pending_msg_type],pending_msg_id);
switch (msg_type) {
case MQTT_MSG_TYPE_CONNACK:
//DBG_MQTT("MQTT: Connect successful\n");
// callbacks for internal and external clients
if (client->connectedCb) client->connectedCb((uint32_t*)client);
if (client->cmdConnectedCb) client->cmdConnectedCb((uint32_t*)client);
client->reconTimeout = 1; // reset the reconnect backoff
break;
case MQTT_MSG_TYPE_SUBACK:
if (pending_msg_type == MQTT_MSG_TYPE_SUBSCRIBE && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: Subscribe successful\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
}
break;
case MQTT_MSG_TYPE_UNSUBACK:
if (pending_msg_type == MQTT_MSG_TYPE_UNSUBSCRIBE && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: Unsubscribe successful\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
}
break;
case MQTT_MSG_TYPE_PUBACK: // ack for a publish we sent
if (pending_msg_type == MQTT_MSG_TYPE_PUBLISH && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: QoS1 Publish successful\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
}
break;
case MQTT_MSG_TYPE_PUBREC: // rec for a publish we sent
if (pending_msg_type == MQTT_MSG_TYPE_PUBLISH && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: QoS2 publish cont\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
// we need to send PUBREL
mqtt_msg_pubrel(&client->mqtt_connection, msg_id);
mqtt_enq_message(client, client->mqtt_connection.message.data,
client->mqtt_connection.message.length);
}
break;
case MQTT_MSG_TYPE_PUBCOMP: // comp for a pubrel we sent (originally publish we sent)
if (pending_msg_type == MQTT_MSG_TYPE_PUBREL && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: QoS2 Publish successful\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
}
break;
case MQTT_MSG_TYPE_PUBLISH: { // incoming publish
// we may need to ACK the publish
uint8_t msg_qos = mqtt_get_qos(client->in_buffer);
#ifdef MQTT_DBG
uint16_t topic_length = msg_len;
os_printf("MQTT: Recv PUBLISH qos=%d %s\n", msg_qos,
mqtt_get_publish_topic(client->in_buffer, &topic_length));
#endif
if (msg_qos == 1) mqtt_msg_puback(&client->mqtt_connection, msg_id);
if (msg_qos == 2) mqtt_msg_pubrec(&client->mqtt_connection, msg_id);
if (msg_qos == 1 || msg_qos == 2) {
mqtt_enq_message(client, client->mqtt_connection.message.data,
client->mqtt_connection.message.length);
}
// send the publish message to clients
deliver_publish(client, client->in_buffer, msg_len);
}
break;
case MQTT_MSG_TYPE_PUBREL: // rel for a rec we sent (originally publish received)
if (pending_msg_type == MQTT_MSG_TYPE_PUBREC && pending_msg_id == msg_id) {
//DBG_MQTT("MQTT: Cont QoS2 recv\n");
client->pending_buffer = PktBuf_ShiftFree(client->pending_buffer);
// we need to send PUBCOMP
mqtt_msg_pubcomp(&client->mqtt_connection, msg_id);
mqtt_enq_message(client, client->mqtt_connection.message.data,
client->mqtt_connection.message.length);
}
break;
case MQTT_MSG_TYPE_PINGRESP:
client->keepAliveAckTick = 0;
break;
}
// Shift out the message and see whether we have another one
if (msg_len < client->in_buffer_filled)
os_memcpy(client->in_buffer, client->in_buffer+msg_len, client->in_buffer_filled-msg_len);
client->in_buffer_filled -= msg_len;
} while(client->in_buffer_filled > 0 || len > 0);
// Send next packet out, if possible
if (!client->sending && client->pending_buffer == NULL && client->msgQueue != NULL) {
mqtt_send_message(client);
}
}
