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nodemcu-firmware/app/modules/mqtt.c

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// Module for mqtt
//
#include "module.h"
#include "lauxlib.h"
#include "platform.h"
#include <string.h>
#include <stdlib.h>
#include "c_types.h"
#include "mem.h"
#include "lwip/ip_addr.h"
#include "espconn.h"
#include "mqtt_msg.h"
#include "msg_queue.h"
#include "user_interface.h"
#define MQTT_BUF_SIZE 1460
#define MQTT_DEFAULT_KEEPALIVE 60
#define MQTT_MAX_CLIENT_LEN 64
#define MQTT_MAX_USER_LEN 64
#define MQTT_MAX_PASS_LEN 64
#define MQTT_SEND_TIMEOUT 5
/*
* This timeout needs to be long enough for a typical TCP connect()
* *and* the TLS handshake, if any. Most network stacks seem to wait
* tens of seconds for connect(), and TLS can take a good deal of time
* and several round trips. Because this matters only rarely, it may
* as well be set pretty high.
*/
#define MQTT_CONNECT_TIMEOUT 60
typedef enum {
MQTT_INIT,
MQTT_CONNECT_SENT,
MQTT_CONNECT_SENDING,
MQTT_DATA
} tConnState;
typedef struct mqtt_event_data_t
{
uint8_t type;
const char* topic;
const char* data;
uint16_t topic_length;
uint16_t data_length;
uint16_t data_offset;
} mqtt_event_data_t;
typedef enum {
MQTT_RECV_NORMAL,
MQTT_RECV_BUFFERING_SHORT,
MQTT_RECV_BUFFERING,
MQTT_RECV_SKIPPING,
} tReceiveState;
typedef struct mqtt_state_t
{
uint16_t port;
mqtt_connect_info_t* connect_info;
mqtt_connection_t mqtt_connection;
msg_queue_t* pending_msg_q;
uint8_t * recv_buffer; // heap buffer for multi-packet rx
uint8_t * recv_buffer_wp; // write pointer in multi-packet rx
union {
uint16_t recv_buffer_size; // size of recv_buffer
uint32_t recv_buffer_skip; // number of bytes left to skip, in skipping state
};
tReceiveState recv_buffer_state;
} mqtt_state_t;
typedef struct lmqtt_userdata
{
struct espconn *pesp_conn;
int self_ref;
int cb_connect_ref;
int cb_connect_fail_ref;
int cb_disconnect_ref;
int cb_message_ref;
int cb_overflow_ref;
int cb_suback_ref;
int cb_unsuback_ref;
int cb_puback_ref;
mqtt_state_t mqtt_state;
mqtt_connect_info_t connect_info;
uint16_t keep_alive_tick;
uint32_t event_timeout;
#ifdef CLIENT_SSL_ENABLE
uint8_t secure;
#endif
bool connected; // indicate socket connected, not mqtt prot connected.
bool keepalive_sent;
ETSTimer mqttTimer;
tConnState connState;
}lmqtt_userdata;
// How large MQTT messages to accept by default
#define DEFAULT_MAX_MESSAGE_LENGTH 1024
static sint8 socket_connect(struct espconn *pesp_conn);
static void mqtt_socket_reconnected(void *arg, sint8_t err);
static void mqtt_socket_connected(void *arg);
static void mqtt_connack_fail(lmqtt_userdata * mud, int reason_code);
static void mqtt_socket_disconnected(void *arg) // tcp only
{
NODE_DBG("enter mqtt_socket_disconnected.\n");
struct espconn *pesp_conn = arg;
bool call_back = false;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
os_timer_disarm(&mud->mqttTimer);
lua_State *L = lua_getstate();
if(mud->connected){ // call back only called when socket is from connection to disconnection.
mud->connected = false;
if((mud->cb_disconnect_ref != LUA_NOREF) && (mud->self_ref != LUA_NOREF)) {
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_disconnect_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata(client) to callback func in lua
call_back = true;
}
}
if(mud->mqtt_state.recv_buffer) {
free(mud->mqtt_state.recv_buffer);
mud->mqtt_state.recv_buffer = NULL;
}
mud->mqtt_state.recv_buffer_size = 0;
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
if(mud->pesp_conn){
mud->pesp_conn->reverse = NULL;
if(mud->pesp_conn->proto.tcp)
free(mud->pesp_conn->proto.tcp);
mud->pesp_conn->proto.tcp = NULL;
free(mud->pesp_conn);
mud->pesp_conn = NULL;
}
mud->connected = false;
luaL_unref(L, LUA_REGISTRYINDEX, mud->self_ref);
mud->self_ref = LUA_NOREF; // unref this, and the mqtt.socket userdata will delete it self
if(call_back){
lua_call(L, 1, 0);
}
NODE_DBG("leave mqtt_socket_disconnected.\n");
}
static void mqtt_socket_reconnected(void *arg, sint8_t err)
{
NODE_DBG("enter mqtt_socket_reconnected.\n");
// mqtt_socket_disconnected(arg);
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
os_timer_disarm(&mud->mqttTimer);
mud->event_timeout = 0; // no need to count anymore
#ifdef CLIENT_SSL_ENABLE
if (mud->secure) {
espconn_secure_disconnect(pesp_conn);
} else
#endif
{
espconn_disconnect(pesp_conn);
}
mqtt_connack_fail(mud, MQTT_CONN_FAIL_SERVER_NOT_FOUND);
mqtt_socket_disconnected(arg);
NODE_DBG("leave mqtt_socket_reconnected.\n");
}
static void deliver_publish(lmqtt_userdata * mud, uint8_t* message, uint16_t length, uint8_t is_overflow)
{
NODE_DBG("enter deliver_publish (len=%d, overflow=%d).\n", length, is_overflow);
if(mud == NULL)
return;
mqtt_event_data_t event_data;
event_data.topic_length = length;
event_data.topic = mqtt_get_publish_topic(message, &event_data.topic_length);
event_data.data_length = length;
event_data.data = mqtt_get_publish_data(message, &event_data.data_length);
int cb_ref = !is_overflow ? mud->cb_message_ref : mud->cb_overflow_ref;
if(cb_ref == LUA_NOREF)
return;
if(mud->self_ref == LUA_NOREF)
return;
lua_State *L = lua_getstate();
if(event_data.topic && (event_data.topic_length > 0)){
lua_rawgeti(L, LUA_REGISTRYINDEX, cb_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_pushlstring(L, event_data.topic, event_data.topic_length);
} else {
NODE_DBG("get wrong packet.\n");
return;
}
if(event_data.data && (event_data.data_length > 0)){
lua_pushlstring(L, event_data.data, event_data.data_length);
lua_call(L, 3, 0);
} else {
lua_call(L, 2, 0);
}
NODE_DBG("leave deliver_publish.\n");
}
static void mqtt_connack_fail(lmqtt_userdata * mud, int reason_code)
{
if(mud->cb_connect_fail_ref == LUA_NOREF || mud->self_ref == LUA_NOREF)
{
return;
}
lua_State *L = lua_getstate();
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_connect_fail_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata(client) to callback func in lua
lua_pushinteger(L, reason_code);
lua_call(L, 2, 0);
}
static sint8 mqtt_send_if_possible(struct espconn *pesp_conn)
{
if(pesp_conn == NULL)
return ESPCONN_OK;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return ESPCONN_OK;
sint8 espconn_status = ESPCONN_OK;
// This indicates if we have sent something and are waiting for something to
// happen
if (mud->event_timeout == 0) {
msg_queue_t *pending_msg = msg_peek(&(mud->mqtt_state.pending_msg_q));
if (pending_msg) {
mud->event_timeout = MQTT_SEND_TIMEOUT;
NODE_DBG("Sent: %d\n", pending_msg->msg.length);
#ifdef CLIENT_SSL_ENABLE
if( mud->secure )
{
espconn_status = espconn_secure_send( pesp_conn, pending_msg->msg.data, pending_msg->msg.length );
}
else
#endif
{
espconn_status = espconn_send( pesp_conn, pending_msg->msg.data, pending_msg->msg.length );
}
mud->keep_alive_tick = 0;
}
}
NODE_DBG("send_if_poss, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
return espconn_status;
}
static void mqtt_socket_received(void *arg, char *pdata, unsigned short len)
{
NODE_DBG("enter mqtt_socket_received (rxlen=%u).\n", len);
uint8_t msg_type;
uint8_t msg_qos;
uint16_t msg_id;
uint8_t *in_buffer = (uint8_t *)pdata;
uint16_t in_buffer_length = len;
uint8_t *continuation_buffer = NULL;
uint8_t *temp_pdata = NULL;
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
switch(mud->mqtt_state.recv_buffer_state) {
case MQTT_RECV_NORMAL:
// No previous buffer.
break;
case MQTT_RECV_BUFFERING_SHORT:
// Last buffer had so few byte that we could not determine message length.
// Store in a local heap buffer and operate on this, as if was the regular pdata buffer.
// Avoids having to repeat message size/overflow logic.
temp_pdata = calloc(1,mud->mqtt_state.recv_buffer_size + len);
if(temp_pdata == NULL) {
NODE_DBG("MQTT[buffering-short]: Failed to allocate %u bytes, disconnecting...\n", mud->mqtt_state.recv_buffer_size + len);
#ifdef CLIENT_SSL_ENABLE
if (mud->secure) {
espconn_secure_disconnect(pesp_conn);
} else
#endif
{
espconn_disconnect(pesp_conn);
}
return;
}
NODE_DBG("MQTT[buffering-short]: Continuing with %u + %u bytes\n", mud->mqtt_state.recv_buffer_size, len);
memcpy(temp_pdata, mud->mqtt_state.recv_buffer, mud->mqtt_state.recv_buffer_size);
memcpy(temp_pdata + mud->mqtt_state.recv_buffer_size, pdata, len);
free(mud->mqtt_state.recv_buffer);
mud->mqtt_state.recv_buffer = NULL;
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
in_buffer = temp_pdata;
in_buffer_length = mud->mqtt_state.recv_buffer_size + len;
break;
case MQTT_RECV_BUFFERING: {
// safe cast: we never allow longer buffer.
uint16_t current_length = (uint16_t) (mud->mqtt_state.recv_buffer_wp - mud->mqtt_state.recv_buffer);
NODE_DBG("MQTT[buffering]: appending %u bytes to previous recv buffer (%u out of wanted %u)\n",
in_buffer_length,
current_length,
mud->mqtt_state.recv_buffer_size);
// Copy from rx buffer to heap buffer. Smallest of [remainder of pending message] and [all of buffer]
uint16_t copy_length = LWIP_MIN(mud->mqtt_state.recv_buffer_size - current_length, in_buffer_length);
memcpy(mud->mqtt_state.recv_buffer_wp, pdata, copy_length);
mud->mqtt_state.recv_buffer_wp += copy_length;
in_buffer_length = (uint16_t) (mud->mqtt_state.recv_buffer_wp - mud->mqtt_state.recv_buffer);
if (in_buffer_length < mud->mqtt_state.recv_buffer_size) {
NODE_DBG("MQTT[buffering]: need %u more bytes, waiting for next rx.\n",
mud->mqtt_state.recv_buffer_size - in_buffer_length
);
goto RX_PACKET_FINISHED;
}
NODE_DBG("MQTT[buffering]: Full message received (%u). remainding bytes=%u\n",
mud->mqtt_state.recv_buffer_size,
len - copy_length);
// Point continuation_buffer to any additional data in pdata.
// May become 0 bytes, but used to trigger free!
continuation_buffer = pdata + copy_length;
len -= copy_length; // borrow len instead of having another variable..
in_buffer = mud->mqtt_state.recv_buffer;
// in_buffer_length was set above
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
break;
}
case MQTT_RECV_SKIPPING:
// Last rx had a message which was too large to process, skip it.
if(mud->mqtt_state.recv_buffer_skip > in_buffer_length) {
NODE_DBG("MQTT[skipping]: skip=%u. Skipping full RX buffer (%u).\n",
mud->mqtt_state.recv_buffer_skip,
in_buffer_length
);
mud->mqtt_state.recv_buffer_skip -= in_buffer_length;
goto RX_PACKET_FINISHED;
}
NODE_DBG("MQTT[skipping]: skip=%u. Skipping partial RX buffer, continuing at %u\n",
mud->mqtt_state.recv_buffer_skip,
in_buffer_length
);
in_buffer += mud->mqtt_state.recv_buffer_skip;
in_buffer_length -= mud->mqtt_state.recv_buffer_skip;
mud->mqtt_state.recv_buffer_skip = 0;
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
break;
}
READPACKET:
if(in_buffer_length <= 0)
goto RX_PACKET_FINISHED;
// MQTT publish message can in theory be 256Mb, while we do not support it we need to be
// able to do math on it.
int32_t message_length;
// temp buffer for control messages
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;
lua_State *L = lua_getstate();
switch(mud->connState){
case MQTT_CONNECT_SENDING:
case MQTT_CONNECT_SENT:
mud->event_timeout = 0;
if(mqtt_get_type(in_buffer) != MQTT_MSG_TYPE_CONNACK){
NODE_DBG("MQTT: Invalid packet\r\n");
mud->connState = MQTT_INIT;
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_disconnect(pesp_conn);
}
else
#endif
{
espconn_disconnect(pesp_conn);
}
mqtt_connack_fail(mud, MQTT_CONN_FAIL_NOT_A_CONNACK_MSG);
break;
} else if (mqtt_get_connect_ret_code(in_buffer) != MQTT_CONNACK_ACCEPTED) {
NODE_DBG("MQTT: CONNACK REFUSED (CODE: %d)\n", mqtt_get_connect_ret_code(in_buffer));
mud->connState = MQTT_INIT;
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_disconnect(pesp_conn);
}
else
#endif
{
espconn_disconnect(pesp_conn);
}
mqtt_connack_fail(mud, mqtt_get_connect_ret_code(in_buffer));
break;
} else {
mud->connState = MQTT_DATA;
NODE_DBG("MQTT: Connected\r\n");
mud->keepalive_sent = 0;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_fail_ref);
mud->cb_connect_fail_ref = LUA_NOREF;
if(mud->cb_connect_ref == LUA_NOREF)
break;
if(mud->self_ref == LUA_NOREF)
break;
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_connect_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata(client) to callback func in lua
lua_call(L, 1, 0);
break;
}
break;
case MQTT_DATA:
message_length = mqtt_get_total_length(in_buffer, in_buffer_length);
msg_type = mqtt_get_type(in_buffer);
msg_qos = mqtt_get_qos(in_buffer);
msg_id = mqtt_get_id(in_buffer, in_buffer_length);
NODE_DBG("MQTT_DATA: msg length: %u, buffer length: %u\r\n",
message_length,
in_buffer_length);
if (message_length > mud->connect_info.max_message_length) {
// The pending message length is larger than we was configured to allow
if(msg_qos > 0 && msg_id == 0) {
NODE_DBG("MQTT: msg too long, but not enough data to get msg_id: total=%u, deliver=%u\r\n", message_length, in_buffer_length);
// qos requested, but too short buffer to get a packet ID.
// Trigger the "short buffer" mode
message_length = -1;
// Drop through to partial message handling below.
} else {
NODE_DBG("MQTT: msg too long: total=%u, deliver=%u\r\n", message_length, in_buffer_length);
if (msg_type == MQTT_MSG_TYPE_PUBLISH) {
// In practice we should never get any other types..
deliver_publish(mud, in_buffer, in_buffer_length, 1);
// If qos specified, we should ACK it.
// In theory it might be wrong to ack it before we received all TCP packets, but this avoids
// buffering and special code to handle this corner-case. Server will most likely have
// written all to OS socket anyway, and not be aware that we "should" not have received it all yet.
if(msg_qos == 1){
temp_msg = mqtt_msg_puback(&mud->mqtt_state.mqtt_connection, msg_id);
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);
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);
}
}
if (message_length > in_buffer_length) {
// Ignore bytes in subsequent packet(s) too.
NODE_DBG("MQTT: skipping into next rx\n");
mud->mqtt_state.recv_buffer_state = MQTT_RECV_SKIPPING;
mud->mqtt_state.recv_buffer_skip = (uint32_t) message_length - in_buffer_length;
break;
} else {
NODE_DBG("MQTT: Skipping message\n");
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
goto RX_MESSAGE_PROCESSED;
}
}
}
if (message_length == -1 || message_length > in_buffer_length) {
// Partial message in buffer, need to store on heap until next RX. Allocate size for full message directly,
// instead of potential reallocs, to avoid fragmentation.
// If message_length is indicated as -1, we do not have enough data to determine the length properly.
// Just put what we have on heap, and place in state BUFFERING_SHORT.
NODE_DBG("MQTT: Partial message received (%u of %d). Buffering\r\n",
in_buffer_length,
message_length);
// although message_length is 32bit, it should never go above 16bit since
// max_message_length is 16bit.
uint16_t alloc_size = message_length > 0 ? (uint16_t)message_length : in_buffer_length;
mud->mqtt_state.recv_buffer = calloc(1,alloc_size);
if (mud->mqtt_state.recv_buffer == NULL) {
NODE_DBG("MQTT: Failed to allocate %u bytes, disconnecting...\n", alloc_size);
#ifdef CLIENT_SSL_ENABLE
if (mud->secure) {
espconn_secure_disconnect(pesp_conn);
} else
#endif
{
espconn_disconnect(pesp_conn);
}
return;
}
memcpy(mud->mqtt_state.recv_buffer, in_buffer, in_buffer_length);
mud->mqtt_state.recv_buffer_wp = mud->mqtt_state.recv_buffer + in_buffer_length;
mud->mqtt_state.recv_buffer_state = message_length > 0 ? MQTT_RECV_BUFFERING : MQTT_RECV_BUFFERING_SHORT;
mud->mqtt_state.recv_buffer_size = alloc_size;
NODE_DBG("MQTT: Wait for next recv\n");
break;
}
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, msg length: %u, buffer length: %u\r\n",
msg_type,
msg_qos,
msg_id,
(pending_msg)?pending_msg->msg_id:0,
message_length,
in_buffer_length);
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;
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_suback_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref);
lua_call(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)));
if (mud->cb_unsuback_ref == LUA_NOREF)
break;
if (mud->self_ref == LUA_NOREF)
break;
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_unsuback_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref);
lua_call(L, 1, 0);
}
break;
case MQTT_MSG_TYPE_PUBLISH:
if(msg_qos == 1){
temp_msg = mqtt_msg_puback(&mud->mqtt_state.mqtt_connection, msg_id);
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);
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, (uint16_t)message_length, 0);
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;
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_call(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: actually, 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);
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);
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;
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_call(L, 1, 0);
}
break;
case MQTT_MSG_TYPE_PINGREQ:
temp_msg = mqtt_msg_pingresp(&mud->mqtt_state.mqtt_connection);
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
mud->keepalive_sent = 0;
NODE_DBG("MQTT: PINGRESP received\r\n");
break;
}
RX_MESSAGE_PROCESSED:
if(continuation_buffer != NULL) {
NODE_DBG("MQTT[buffering]: buffered message finished. Continuing with rest of rx buffer (%u)\n",
len);
free(mud->mqtt_state.recv_buffer);
mud->mqtt_state.recv_buffer = NULL;
in_buffer = continuation_buffer;
in_buffer_length = len;
continuation_buffer = NULL;
}else{
// Message have been fully processed (or ignored). Move pointer ahead
// and continue with next message, if any.
in_buffer_length -= message_length;
in_buffer += message_length;
}
if(in_buffer_length > 0)
{
NODE_DBG("Get another published message\r\n");
goto READPACKET;
}
break;
}
RX_PACKET_FINISHED:
if(temp_pdata != NULL) {
free(temp_pdata);
}
mqtt_send_if_possible(pesp_conn);
NODE_DBG("leave mqtt_socket_received\n");
return;
}
static void mqtt_socket_sent(void *arg)
{
NODE_DBG("enter mqtt_socket_sent.\n");
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
if(!mud->connected)
return;
// call mqtt_sent()
mud->event_timeout = 0;
mud->keep_alive_tick = 0;
if(mud->connState == MQTT_CONNECT_SENDING){
mud->connState = MQTT_CONNECT_SENT;
mud->event_timeout = MQTT_SEND_TIMEOUT;
// MQTT_CONNECT not queued.
return;
}
NODE_DBG("sent1, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
uint8_t try_send = 1;
// qos = 0, publish and forgot.
msg_queue_t *node = msg_peek(&(mud->mqtt_state.pending_msg_q));
if(node && node->msg_type == MQTT_MSG_TYPE_PUBLISH && node->publish_qos == 0) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
if(mud->cb_puback_ref != LUA_NOREF && mud->self_ref != LUA_NOREF) {
lua_State *L = lua_getstate();
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
lua_rawgeti(L, LUA_REGISTRYINDEX, mud->self_ref); // pass the userdata to callback func in lua
lua_call(L, 1, 0);
}
} else if(node && node->msg_type == MQTT_MSG_TYPE_PUBACK) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
} else if(node && node->msg_type == MQTT_MSG_TYPE_PUBCOMP) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
} else if(node && node->msg_type == MQTT_MSG_TYPE_PINGREQ) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
} else {
try_send = 0;
}
if (try_send) {
mqtt_send_if_possible(mud->pesp_conn);
}
NODE_DBG("sent2, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
NODE_DBG("leave mqtt_socket_sent.\n");
}
static void mqtt_socket_connected(void *arg)
{
NODE_DBG("enter mqtt_socket_connected.\n");
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL)
return;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return;
mud->connected = true;
espconn_regist_recvcb(pesp_conn, mqtt_socket_received);
espconn_regist_sentcb(pesp_conn, mqtt_socket_sent);
espconn_regist_disconcb(pesp_conn, mqtt_socket_disconnected);
uint8_t temp_buffer[MQTT_BUF_SIZE];
// call mqtt_connect() to start a mqtt connect stage.
mqtt_msg_init(&mud->mqtt_state.mqtt_connection, temp_buffer, MQTT_BUF_SIZE);
mqtt_message_t* temp_msg = mqtt_msg_connect(&mud->mqtt_state.mqtt_connection, mud->mqtt_state.connect_info);
NODE_DBG("Send MQTT connection infomation, data len: %d, d[0]=%d \r\n", temp_msg->length, temp_msg->data[0]);
mud->event_timeout = MQTT_SEND_TIMEOUT;
// not queue this message. should send right now. or should enqueue this before head.
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_send(pesp_conn, temp_msg->data, temp_msg->length);
}
else
#endif
{
espconn_send(pesp_conn, temp_msg->data, temp_msg->length);
}
mud->keep_alive_tick = 0;
mud->connState = MQTT_CONNECT_SENDING;
NODE_DBG("leave mqtt_socket_connectet, heap = %u.\n", system_get_free_heap_size());
return;
}
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");
os_timer_disarm(&mud->mqttTimer);
mqtt_connack_fail(mud, MQTT_CONN_FAIL_SERVER_NOT_FOUND);
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_disconnect(mud->pesp_conn);
}
else
#endif
{
espconn_disconnect(mud->pesp_conn);
}
} else if(mud->connState == MQTT_CONNECT_SENDING){ // MQTT_CONNECT send time out.
NODE_DBG("sSend MQTT_CONNECT failed.\n");
mud->connState = MQTT_INIT;
mqtt_connack_fail(mud, MQTT_CONN_FAIL_TIMEOUT_SENDING);
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_disconnect(mud->pesp_conn);
}
else
#endif
{
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 timeout.\n");
mud->connState = MQTT_INIT;
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_secure_disconnect(mud->pesp_conn);
}
else
#endif
{
espconn_disconnect(mud->pesp_conn);
}
mqtt_connack_fail(mud, MQTT_CONN_FAIL_TIMEOUT_RECEIVING);
} else if(mud->connState == MQTT_DATA){
msg_queue_t *pending_msg = msg_peek(&(mud->mqtt_state.pending_msg_q));
if(pending_msg){
mqtt_send_if_possible(mud->pesp_conn);
} else {
// no queued event.
mud->keep_alive_tick ++;
if(mud->keep_alive_tick > mud->mqtt_state.connect_info->keepalive){
if (mud->keepalive_sent) {
// Oh dear -- keepalive timer expired and still no ack of previous message
mqtt_socket_reconnected(mud->pesp_conn, 0);
} else {
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) );
mud->keepalive_sent = 1;
mud->keep_alive_tick = 0; // Need to reset to zero in case flow control stopped.
mqtt_send_if_possible(mud->pesp_conn);
}
}
}
}
NODE_DBG("keep_alive_tick: %d\n", mud->keep_alive_tick);
NODE_DBG("leave mqtt_socket_timer.\n");
}
// Lua: mqtt.Client(clientid, keepalive, user, pass, clean_session, max_message_length)
static int mqtt_socket_client( lua_State* L )
{
NODE_DBG("enter mqtt_socket_client.\n");
lmqtt_userdata *mud;
char tempid[20] = {0};
sprintf(tempid, "%s%x", "NodeMCU_", system_get_chip_id() );
NODE_DBG(tempid);
NODE_DBG("\n");
const char *clientId = tempid, *username = NULL, *password = NULL;
size_t idl = strlen(tempid);
size_t unl = 0, pwl = 0;
int keepalive = 0;
int stack = 1;
int clean_session = 1;
int max_message_length = 0;
int top = lua_gettop(L);
// create a object
mud = (lmqtt_userdata *)lua_newuserdata(L, sizeof(lmqtt_userdata));
memset(mud, 0, sizeof(*mud));
// pre-initialize it, in case of errors
mud->self_ref = LUA_NOREF;
mud->cb_connect_ref = LUA_NOREF;
mud->cb_connect_fail_ref = LUA_NOREF;
mud->cb_disconnect_ref = LUA_NOREF;
mud->cb_message_ref = LUA_NOREF;
mud->cb_overflow_ref = LUA_NOREF;
mud->cb_suback_ref = LUA_NOREF;
mud->cb_unsuback_ref = LUA_NOREF;
mud->cb_puback_ref = LUA_NOREF;
mud->connState = MQTT_INIT;
// set its metatable
luaL_getmetatable(L, "mqtt.socket");
lua_setmetatable(L, -2);
if( lua_isstring(L,stack) ) // deal with the clientid string
{
clientId = luaL_checklstring( L, stack, &idl );
stack++;
}
if(lua_isnumber( L, stack ))
{
keepalive = luaL_checkinteger( L, stack);
stack++;
}
if(keepalive == 0){
keepalive = MQTT_DEFAULT_KEEPALIVE;
}
if(lua_isstring( L, stack )){
username = luaL_checklstring( L, stack, &unl );
stack++;
}
if(username == NULL)
unl = 0;
NODE_DBG("length username: %d\r\n", unl);
if(lua_isstring( L, stack )){
password = luaL_checklstring( L, stack, &pwl );
stack++;
}
if(password == NULL)
pwl = 0;
NODE_DBG("length password: %d\r\n", pwl);
if(lua_isnumber( L, stack ))
{
clean_session = luaL_checkinteger( L, stack);
stack++;
}
if(clean_session > 1){
clean_session = 1;
}
if(lua_isnumber( L, stack ))
{
max_message_length = luaL_checkinteger( L, stack);
stack++;
}
if(max_message_length == 0) {
max_message_length = DEFAULT_MAX_MESSAGE_LENGTH;
}
// TODO: check the zalloc result.
mud->connect_info.client_id = (uint8_t *)calloc(1,idl+1);
mud->connect_info.username = (uint8_t *)calloc(1,unl + 1);
mud->connect_info.password = (uint8_t *)calloc(1,pwl + 1);
if(!mud->connect_info.client_id || !mud->connect_info.username || !mud->connect_info.password){
if(mud->connect_info.client_id) {
free(mud->connect_info.client_id);
mud->connect_info.client_id = NULL;
}
if(mud->connect_info.username) {
free(mud->connect_info.username);
mud->connect_info.username = NULL;
}
if(mud->connect_info.password) {
free(mud->connect_info.password);
mud->connect_info.password = NULL;
}
return luaL_error(L, "not enough memory");
}
memcpy(mud->connect_info.client_id, clientId, idl);
mud->connect_info.client_id[idl] = 0;
memcpy(mud->connect_info.username, username, unl);
mud->connect_info.username[unl] = 0;
memcpy(mud->connect_info.password, password, pwl);
mud->connect_info.password[pwl] = 0;
NODE_DBG("MQTT: Init info: %s, %s, %s\r\n", mud->connect_info.client_id, mud->connect_info.username, mud->connect_info.password);
mud->connect_info.clean_session = clean_session;
mud->connect_info.will_qos = 0;
mud->connect_info.will_retain = 0;
mud->connect_info.keepalive = keepalive;
mud->connect_info.max_message_length = max_message_length;
mud->mqtt_state.pending_msg_q = NULL;
mud->mqtt_state.port = 1883;
mud->mqtt_state.connect_info = &mud->connect_info;
mud->mqtt_state.recv_buffer = NULL;
mud->mqtt_state.recv_buffer_size = 0;
mud->mqtt_state.recv_buffer_state = MQTT_RECV_NORMAL;
NODE_DBG("leave mqtt_socket_client.\n");
return 1;
}
// Lua: mqtt.delete( socket )
// call close() first
// socket: unref everything
static int mqtt_delete( lua_State* L )
{
NODE_DBG("enter mqtt_delete.\n");
lmqtt_userdata *mud = (lmqtt_userdata *)luaL_checkudata(L, 1, "mqtt.socket");
luaL_argcheck(L, mud, 1, "mqtt.socket expected");
if(mud==NULL){
NODE_DBG("userdata is nil.\n");
return 0;
}
os_timer_disarm(&mud->mqttTimer);
mud->connected = false;
// ---- alloc-ed in mqtt_socket_connect()
if(mud->pesp_conn){ // for client connected to tcp server, this should set NULL in disconnect cb
mud->pesp_conn->reverse = NULL;
if(mud->pesp_conn->proto.tcp)
free(mud->pesp_conn->proto.tcp);
mud->pesp_conn->proto.tcp = NULL;
free(mud->pesp_conn);
mud->pesp_conn = NULL; // for socket, it will free this when disconnected
}
while(mud->mqtt_state.pending_msg_q) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
}
// ---- alloc-ed in mqtt_socket_lwt()
if(mud->connect_info.will_topic){
free(mud->connect_info.will_topic);
mud->connect_info.will_topic = NULL;
}
if(mud->connect_info.will_message){
free(mud->connect_info.will_message);
mud->connect_info.will_message = NULL;
}
// ----
//--------- alloc-ed in mqtt_socket_received()
if(mud->mqtt_state.recv_buffer) {
free(mud->mqtt_state.recv_buffer);
mud->mqtt_state.recv_buffer = NULL;
}
// ----
//--------- alloc-ed in mqtt_socket_client()
if(mud->connect_info.client_id){
free(mud->connect_info.client_id);
mud->connect_info.client_id = NULL;
}
if(mud->connect_info.username){
free(mud->connect_info.username);
mud->connect_info.username = NULL;
}
if(mud->connect_info.password){
free(mud->connect_info.password);
mud->connect_info.password = NULL;
}
// -------
// free (unref) callback ref
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_ref);
mud->cb_connect_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_fail_ref);
mud->cb_connect_fail_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_disconnect_ref);
mud->cb_disconnect_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_message_ref);
mud->cb_message_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_overflow_ref);
mud->cb_overflow_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_suback_ref);
mud->cb_suback_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_unsuback_ref);
mud->cb_unsuback_ref = LUA_NOREF;
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
mud->cb_puback_ref = LUA_NOREF;
lua_gc(L, LUA_GCSTOP, 0);
luaL_unref(L, LUA_REGISTRYINDEX, mud->self_ref);
mud->self_ref = LUA_NOREF;
lua_gc(L, LUA_GCRESTART, 0);
NODE_DBG("leave mqtt_delete.\n");
return 0;
}
static sint8 socket_connect(struct espconn *pesp_conn)
{
NODE_DBG("enter socket_connect.\n");
sint8 espconn_status;
if(pesp_conn == NULL)
return ESPCONN_CONN;
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud == NULL)
return ESPCONN_ARG;
mud->event_timeout = MQTT_CONNECT_TIMEOUT;
mud->connState = MQTT_INIT;
#ifdef CLIENT_SSL_ENABLE
if(mud->secure)
{
espconn_status = espconn_secure_connect(pesp_conn);
}
else
#endif
{
espconn_status = espconn_connect(pesp_conn);
}
os_timer_arm(&mud->mqttTimer, 1000, 1);
NODE_DBG("leave socket_connect\n");
return espconn_status;
}
static sint8 socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg);
static int dns_reconn_count = 0;
static ip_addr_t host_ip; // for dns
/* wrapper for using socket_dns_found() as callback function */
static void socket_dns_foundcb(const char *name, ip_addr_t *ipaddr, void *arg)
{
socket_dns_found(name, ipaddr, arg);
}
static sint8 socket_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
{
NODE_DBG("enter socket_dns_found.\n");
sint8 espconn_status = ESPCONN_OK;
struct espconn *pesp_conn = arg;
if(pesp_conn == NULL){
NODE_DBG("pesp_conn null.\n");
return -1;
}
if(ipaddr == NULL)
{
dns_reconn_count++;
if( dns_reconn_count >= 5 ){
NODE_DBG( "DNS Fail!\n" );
// Note: should delete the pesp_conn or unref self_ref here.
struct espconn *pesp_conn = arg;
if(pesp_conn != NULL) {
lmqtt_userdata *mud = (lmqtt_userdata *)pesp_conn->reverse;
if(mud != NULL) {
mqtt_connack_fail(mud, MQTT_CONN_FAIL_DNS);
}
}
mqtt_socket_disconnected(arg); // although not connected, but fire disconnect callback to release every thing.
return -1;
}
NODE_DBG( "DNS retry %d!\n", dns_reconn_count );
host_ip.addr = 0;
return espconn_gethostbyname(pesp_conn, name, &host_ip, socket_dns_foundcb);
}
// ipaddr->addr is a uint32_t ip
if(ipaddr->addr != 0)
{
dns_reconn_count = 0;
memcpy(pesp_conn->proto.tcp->remote_ip, &(ipaddr->addr), 4);
NODE_DBG("TCP ip is set: ");
NODE_DBG(IPSTR, IP2STR(&(ipaddr->addr)));
NODE_DBG("\n");
espconn_status = socket_connect(pesp_conn);
}
NODE_DBG("leave socket_dns_found.\n");
return espconn_status;
}
#include "pm/swtimer.h"
// Lua: mqtt:connect( host, port, secure, function(client), function(client, connect_return_code) )
static int mqtt_socket_connect( lua_State* L )
{
NODE_DBG("enter mqtt_socket_connect.\n");
lmqtt_userdata *mud = NULL;
unsigned port = 1883;
size_t il;
ip_addr_t ipaddr;
const char *domain;
int stack = 1;
unsigned secure = 0;
int top = lua_gettop(L);
sint8 espconn_status;
mud = (lmqtt_userdata *)luaL_checkudata(L, stack, "mqtt.socket");
luaL_argcheck(L, mud, stack, "mqtt.socket expected");
stack++;
if(mud == NULL)
return 0;
if(mud->connected){
return luaL_error(L, "already connected");
}
struct espconn *pesp_conn = mud->pesp_conn;
if(!pesp_conn) {
pesp_conn = mud->pesp_conn = (struct espconn *)calloc(1,sizeof(struct espconn));
} else {
espconn_delete(pesp_conn);
}
if(!pesp_conn)
return luaL_error(L, "not enough memory");
if (!pesp_conn->proto.tcp)
pesp_conn->proto.tcp = (esp_tcp *)calloc(1,sizeof(esp_tcp));
if(!pesp_conn->proto.tcp){
free(pesp_conn);
pesp_conn = mud->pesp_conn = NULL;
return luaL_error(L, "not enough memory");
}
// reverse is for the callback function
pesp_conn->reverse = mud;
pesp_conn->type = ESPCONN_TCP;
pesp_conn->state = ESPCONN_NONE;
mud->connected = false;
if( (stack<=top) && lua_isstring(L,stack) ) // deal with the domain string
{
domain = luaL_checklstring( L, stack, &il );
stack++;
if (domain == NULL)
{
domain = "127.0.0.1";
}
ipaddr.addr = ipaddr_addr(domain);
memcpy(pesp_conn->proto.tcp->remote_ip, &ipaddr.addr, 4);
NODE_DBG("TCP ip is set: ");
NODE_DBG(IPSTR, IP2STR(&ipaddr.addr));
NODE_DBG("\n");
}
if ( (stack<=top) && lua_isnumber(L, stack) )
{
port = lua_tointeger(L, stack);
stack++;
NODE_DBG("TCP port is set: %d.\n", port);
}
pesp_conn->proto.tcp->remote_port = port;
if (pesp_conn->proto.tcp->local_port == 0)
pesp_conn->proto.tcp->local_port = espconn_port();
mud->mqtt_state.port = port;
if ( (stack<=top) && (lua_isnumber(L, stack) || lua_isboolean(L, stack)) )
{
if (lua_isnumber(L, stack)) {
platform_print_deprecation_note("mqtt.connect secure parameter as integer","in the future");
secure = !!lua_tointeger(L, stack);
} else {
secure = lua_toboolean(L, stack);
}
stack++;
} else {
secure = 0; // default to 0
}
#ifdef CLIENT_SSL_ENABLE
mud->secure = secure; // save
#else
if ( secure )
{
return luaL_error(L, "ssl not available");
}
#endif
// call back function when a connection is obtained, tcp only
if ((stack<=top) && (lua_type(L, stack) == LUA_TFUNCTION || lua_type(L, stack) == LUA_TLIGHTFUNCTION)){
lua_pushvalue(L, stack); // copy argument (func) to the top of stack
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_ref);
mud->cb_connect_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}
stack++;
// call back function when a connection fails
if ((stack<=top) && (lua_type(L, stack) == LUA_TFUNCTION || lua_type(L, stack) == LUA_TLIGHTFUNCTION)){
lua_pushvalue(L, stack); // copy argument (func) to the top of stack
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_fail_ref);
mud->cb_connect_fail_ref = luaL_ref(L, LUA_REGISTRYINDEX);
stack++;
}
lua_pushvalue(L, 1); // copy userdata to the top of stack
luaL_unref(L, LUA_REGISTRYINDEX, mud->self_ref);
mud->self_ref = luaL_ref(L, LUA_REGISTRYINDEX);
espconn_status = espconn_regist_connectcb(pesp_conn, mqtt_socket_connected);
espconn_status |= espconn_regist_reconcb(pesp_conn, mqtt_socket_reconnected);
os_timer_disarm(&mud->mqttTimer);
os_timer_setfn(&mud->mqttTimer, (os_timer_func_t *)mqtt_socket_timer, mud);
SWTIMER_REG_CB(mqtt_socket_timer, SWTIMER_RESUME);
//I assume that mqtt_socket_timer connects to the mqtt server, but I'm not really sure what impact light_sleep will have on it.
//My guess: If in doubt, resume the timer
// timer started in socket_connect()
if((ipaddr.addr == IPADDR_NONE) && (memcmp(domain,"255.255.255.255",16) != 0))
{
host_ip.addr = 0;
dns_reconn_count = 0;
if(ESPCONN_OK == espconn_gethostbyname(pesp_conn, domain, &host_ip, socket_dns_foundcb)){
espconn_status |= socket_dns_found(domain, &host_ip, pesp_conn); // ip is returned in host_ip.
}
}
else
{
espconn_status |= socket_connect(pesp_conn);
}
NODE_DBG("leave mqtt_socket_connect.\n");
if (espconn_status == ESPCONN_OK) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
// Lua: mqtt:close()
// client disconnect and unref itself
static int mqtt_socket_close( lua_State* L )
{
NODE_DBG("enter mqtt_socket_close.\n");
int i = 0;
lmqtt_userdata *mud = NULL;
mud = (lmqtt_userdata *)luaL_checkudata(L, 1, "mqtt.socket");
luaL_argcheck(L, mud, 1, "mqtt.socket expected");
if (mud == NULL || mud->pesp_conn == NULL) {
lua_pushboolean(L, 0);
return 1;
}
sint8 espconn_status = ESPCONN_CONN;
if (mud->connected) {
// Send disconnect message
mqtt_message_t* temp_msg = mqtt_msg_disconnect(&mud->mqtt_state.mqtt_connection);
NODE_DBG("Send MQTT disconnect infomation, data len: %d, d[0]=%d \r\n", temp_msg->length, temp_msg->data[0]);
#ifdef CLIENT_SSL_ENABLE
if(mud->secure) {
espconn_status = espconn_secure_send(mud->pesp_conn, temp_msg->data, temp_msg->length);
if(mud->pesp_conn->proto.tcp->remote_port || mud->pesp_conn->proto.tcp->local_port)
espconn_status |= espconn_secure_disconnect(mud->pesp_conn);
} else
#endif
{
espconn_status = espconn_send(mud->pesp_conn, temp_msg->data, temp_msg->length);
if(mud->pesp_conn->proto.tcp->remote_port || mud->pesp_conn->proto.tcp->local_port)
espconn_status |= espconn_disconnect(mud->pesp_conn);
}
}
mud->connected = 0;
while (mud->mqtt_state.pending_msg_q) {
msg_destroy(msg_dequeue(&(mud->mqtt_state.pending_msg_q)));
}
NODE_DBG("leave mqtt_socket_close.\n");
if (espconn_status == ESPCONN_OK) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
// Lua: mqtt:on( "method", function() )
static int mqtt_socket_on( lua_State* L )
{
NODE_DBG("enter mqtt_socket_on.\n");
lmqtt_userdata *mud;
size_t sl;
mud = (lmqtt_userdata *)luaL_checkudata(L, 1, "mqtt.socket");
luaL_argcheck(L, mud, 1, "mqtt.socket expected");
if(mud==NULL){
NODE_DBG("userdata is nil.\n");
return 0;
}
const char *method = luaL_checklstring( L, 2, &sl );
if (method == NULL)
return luaL_error( L, "wrong arg type" );
luaL_checkanyfunction(L, 3);
lua_pushvalue(L, 3); // copy argument (func) to the top of stack
if( sl == 7 && strcmp(method, "connect") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_connect_ref);
mud->cb_connect_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 7 && strcmp(method, "offline") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_disconnect_ref);
mud->cb_disconnect_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 7 && strcmp(method, "message") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_message_ref);
mud->cb_message_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 8 && strcmp(method, "overflow") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_overflow_ref);
mud->cb_overflow_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 6 && strcmp(method, "puback") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
mud->cb_puback_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 6 && strcmp(method, "suback") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_suback_ref);
mud->cb_suback_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else if( sl == 8 && strcmp(method, "unsuback") == 0){
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_unsuback_ref);
mud->cb_unsuback_ref = luaL_ref(L, LUA_REGISTRYINDEX);
}else{
lua_pop(L, 1);
return luaL_error( L, "method not supported" );
}
NODE_DBG("leave mqtt_socket_on.\n");
return 0;
}
// Lua: bool = mqtt:unsubscribe(topic, function())
static int mqtt_socket_unsubscribe( lua_State* L ) {
NODE_DBG("enter mqtt_socket_unsubscribe.\n");
uint8_t stack = 1;
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("unsubscribe table\n");
lua_pushnil( L ); /* first key */
int topic_count = 0;
uint8_t overflow = 0;
while( lua_next( L, stack ) != 0 ) {
topic = luaL_checkstring( L, -2 );
if (topic_count == 0) {
temp_msg = mqtt_msg_unsubscribe_init( &mud->mqtt_state.mqtt_connection, &msg_id );
}
temp_msg = mqtt_msg_unsubscribe_topic( &mud->mqtt_state.mqtt_connection, topic );
topic_count++;
NODE_DBG("topic: %s - length: %d\n", topic, temp_msg->length);
if (temp_msg->length == 0) {
lua_pop(L, 1);
overflow = 1;
break; // too long message for the outbuffer.
}
lua_pop( L, 1 );
}
if (topic_count == 0){
return luaL_error( L, "no topics found" );
}
if (overflow != 0){
return luaL_error( L, "buffer overflow, can't enqueue all unsubscriptions" );
}
temp_msg = mqtt_msg_unsubscribe_fini( &mud->mqtt_state.mqtt_connection );
if (temp_msg->length == 0) {
return luaL_error( L, "buffer overflow, can't enqueue all unsubscriptions" );
}
stack++;
} else {
NODE_DBG("unsubscribe string\n");
topic = luaL_checklstring( L, stack, &il );
stack++;
if( topic == NULL ){
return luaL_error( L, "need topic name" );
}
temp_msg = mqtt_msg_unsubscribe( &mud->mqtt_state.mqtt_connection, topic, &msg_id );
}
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
luaL_unref( L, LUA_REGISTRYINDEX, mud->cb_unsuback_ref );
mud->cb_unsuback_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_UNSUBSCRIBE, (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);
NODE_DBG("msg_size: %d, event_timeout: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)), mud->event_timeout);
sint8 espconn_status = ESPCONN_IF;
espconn_status = mqtt_send_if_possible(mud->pesp_conn);
if(!node || espconn_status != ESPCONN_OK){
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1); // enqueued succeed.
}
NODE_DBG("unsubscribe, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
NODE_DBG("leave mqtt_socket_unsubscribe.\n");
return 1;
}
// 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 */
int topic_count = 0;
uint8_t overflow = 0;
while( lua_next( L, stack ) != 0 ) {
topic = luaL_checkstring( L, -2 );
qos = luaL_checkinteger( L, -1 );
if (topic_count == 0) {
temp_msg = mqtt_msg_subscribe_init( &mud->mqtt_state.mqtt_connection, &msg_id );
}
temp_msg = mqtt_msg_subscribe_topic( &mud->mqtt_state.mqtt_connection, topic, qos );
topic_count++;
NODE_DBG("topic: %s - qos: %d, length: %d\n", topic, qos, temp_msg->length);
if (temp_msg->length == 0) {
lua_pop(L, 1);
overflow = 1;
break; // too long message for the outbuffer.
}
lua_pop( L, 1 );
}
if (topic_count == 0){
return luaL_error( L, "no topics found" );
}
if (overflow != 0){
return luaL_error( L, "buffer overflow, can't enqueue all subscriptions" );
}
temp_msg = mqtt_msg_subscribe_fini( &mud->mqtt_state.mqtt_connection );
if (temp_msg->length == 0) {
return luaL_error( L, "buffer overflow, can't enqueue all subscriptions" );
}
stack++;
} else {
NODE_DBG("subscribe string\n");
topic = luaL_checklstring( L, stack, &il );
stack++;
if( topic == NULL ){
return luaL_error( L, "need topic name" );
}
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
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);
NODE_DBG("msg_size: %d, event_timeout: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)), mud->event_timeout);
sint8 espconn_status = ESPCONN_IF;
espconn_status = mqtt_send_if_possible(mud->pesp_conn);
if(!node || espconn_status != ESPCONN_OK){
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;
}
// Lua: bool = mqtt:publish( topic, payload, qos, retain, function() )
static int mqtt_socket_publish( lua_State* L )
{
NODE_DBG("enter mqtt_socket_publish.\n");
struct espconn *pesp_conn = NULL;
lmqtt_userdata *mud;
size_t l;
uint8_t stack = 1;
uint16_t msg_id = 0;
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){
return luaL_error( L, "not connected" );
}
const char *topic = luaL_checklstring( L, stack, &l );
stack ++;
if (topic == NULL){
return luaL_error( L, "need topic" );
}
const char *payload = luaL_checklstring( L, stack, &l );
stack ++;
uint8_t qos = luaL_checkinteger( L, stack);
stack ++;
uint8_t retain = luaL_checkinteger( L, stack);
stack ++;
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 = mqtt_msg_publish(&mud->mqtt_state.mqtt_connection,
topic, payload, l,
qos, retain,
&msg_id);
if (lua_type(L, stack) == LUA_TFUNCTION || lua_type(L, stack) == LUA_TLIGHTFUNCTION){
lua_pushvalue(L, stack); // copy argument (func) to the top of stack
luaL_unref(L, LUA_REGISTRYINDEX, mud->cb_puback_ref);
mud->cb_puback_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_PUBLISH, (int)qos );
sint8 espconn_status = ESPCONN_OK;
espconn_status = mqtt_send_if_possible(mud->pesp_conn);
if(!node || espconn_status != ESPCONN_OK){
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1); // enqueued succeed.
}
NODE_DBG("publish, queue size: %d\n", msg_size(&(mud->mqtt_state.pending_msg_q)));
NODE_DBG("leave mqtt_socket_publish.\n");
return 1;
}
// Lua: mqtt:lwt( topic, message, qos, retain, function(client) )
static int mqtt_socket_lwt( lua_State* L )
{
NODE_DBG("enter mqtt_socket_lwt.\n");
uint8_t stack = 1;
size_t topicSize, msgSize;
NODE_DBG("mqtt_socket_lwt.\n");
lmqtt_userdata *mud = NULL;
const char *lwtTopic, *lwtMsg;
uint8_t lwtQoS, lwtRetain;
mud = (lmqtt_userdata *)luaL_checkudata( L, stack, "mqtt.socket" );
luaL_argcheck( L, mud, stack, "mqtt.socket expected" );
if(mud == NULL)
return 0;
stack++;
lwtTopic = luaL_checklstring( L, stack, &topicSize );
if (lwtTopic == NULL)
{
return luaL_error( L, "need lwt topic");
}
stack++;
lwtMsg = luaL_checklstring( L, stack, &msgSize );
if (lwtMsg == NULL)
{
return luaL_error( L, "need lwt message");
}
stack++;
if(mud->connect_info.will_topic){ // free the previous one if there is any
free(mud->connect_info.will_topic);
mud->connect_info.will_topic = NULL;
}
if(mud->connect_info.will_message){
free(mud->connect_info.will_message);
mud->connect_info.will_message = NULL;
}
mud->connect_info.will_topic = (uint8_t*) calloc(1, topicSize + 1 );
mud->connect_info.will_message = (uint8_t*) calloc(1, msgSize + 1 );
if(!mud->connect_info.will_topic || !mud->connect_info.will_message){
if(mud->connect_info.will_topic){
free(mud->connect_info.will_topic);
mud->connect_info.will_topic = NULL;
}
if(mud->connect_info.will_message){
free(mud->connect_info.will_message);
mud->connect_info.will_message = NULL;
}
return luaL_error( L, "not enough memory");
}
memcpy(mud->connect_info.will_topic, lwtTopic, topicSize);
mud->connect_info.will_topic[topicSize] = 0;
memcpy(mud->connect_info.will_message, lwtMsg, msgSize);
mud->connect_info.will_message[msgSize] = 0;
if ( lua_isnumber(L, stack) )
{
mud->connect_info.will_qos = lua_tointeger(L, stack);
stack++;
}
if ( lua_isnumber(L, stack) )
{
mud->connect_info.will_retain = lua_tointeger(L, stack);
stack++;
}
NODE_DBG("mqtt_socket_lwt: topic: %s, message: %s, qos: %d, retain: %d\n",
mud->connect_info.will_topic,
mud->connect_info.will_message,
mud->connect_info.will_qos,
mud->connect_info.will_retain);
NODE_DBG("leave mqtt_socket_lwt.\n");
return 0;
}
// Module function map
LROT_BEGIN(mqtt_socket)
LROT_FUNCENTRY( connect, mqtt_socket_connect )
LROT_FUNCENTRY( close, mqtt_socket_close )
LROT_FUNCENTRY( publish, mqtt_socket_publish )
LROT_FUNCENTRY( subscribe, mqtt_socket_subscribe )
LROT_FUNCENTRY( unsubscribe, mqtt_socket_unsubscribe )
LROT_FUNCENTRY( lwt, mqtt_socket_lwt )
LROT_FUNCENTRY( on, mqtt_socket_on )
LROT_FUNCENTRY( __gc, mqtt_delete )
LROT_TABENTRY( __index, mqtt_socket )
LROT_END( mqtt_socket, mqtt_socket, 0 )
LROT_BEGIN(mqtt)
LROT_FUNCENTRY( Client, mqtt_socket_client )
LROT_NUMENTRY( CONN_FAIL_SERVER_NOT_FOUND, MQTT_CONN_FAIL_SERVER_NOT_FOUND )
LROT_NUMENTRY( CONN_FAIL_NOT_A_CONNACK_MSG, MQTT_CONN_FAIL_NOT_A_CONNACK_MSG )
LROT_NUMENTRY( CONN_FAIL_DNS, MQTT_CONN_FAIL_DNS )
LROT_NUMENTRY( CONN_FAIL_TIMEOUT_RECEIVING, MQTT_CONN_FAIL_TIMEOUT_RECEIVING )
LROT_NUMENTRY( CONN_FAIL_TIMEOUT_SENDING, MQTT_CONN_FAIL_TIMEOUT_SENDING )
LROT_NUMENTRY( CONNACK_ACCEPTED, MQTT_CONNACK_ACCEPTED )
LROT_NUMENTRY( CONNACK_REFUSED_PROTOCOL_VER, MQTT_CONNACK_REFUSED_PROTOCOL_VER )
LROT_NUMENTRY( CONNACK_REFUSED_ID_REJECTED, MQTT_CONNACK_REFUSED_ID_REJECTED )
LROT_NUMENTRY( CONNACK_REFUSED_SERVER_UNAVAILABLE, MQTT_CONNACK_REFUSED_SERVER_UNAVAILABLE )
LROT_NUMENTRY( CONNACK_REFUSED_BAD_USER_OR_PASS, MQTT_CONNACK_REFUSED_BAD_USER_OR_PASS )
LROT_NUMENTRY( CONNACK_REFUSED_NOT_AUTHORIZED, MQTT_CONNACK_REFUSED_NOT_AUTHORIZED )
LROT_TABENTRY( __metatable, mqtt )
LROT_END( mqtt, mqtt, 0 )
int luaopen_mqtt( lua_State *L )
{
luaL_rometatable(L, "mqtt.socket", LROT_TABLEREF(mqtt_socket));
return 0;
}
NODEMCU_MODULE(MQTT, "mqtt", mqtt, luaopen_mqtt);
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