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Make the MQTT PING functionality work better. (#1557) 

Deal with flow control stopped case
This commit is contained in:
Philip Gladstone 2016-11-08 15:00:17 -05:00 committed by Marcel Stör
parent 73773fd8a5
commit b74a9dbdf7
1 changed files with 47 additions and 47 deletions
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20
app/modules/mqtt.c
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@ -72,6 +72,7 @@ typedef struct lmqtt_userdata
uint8_t secure;
#endif
bool connected; // indicate socket connected, not mqtt prot connected.
bool keepalive_sent;
ETSTimer mqttTimer;
tConnState connState;
}lmqtt_userdata;
@ -454,6 +455,7 @@ READPACKET:
break;
case MQTT_MSG_TYPE_PINGRESP:
// Ignore
mud->keepalive_sent = 0;
NODE_DBG("MQTT: PINGRESP received\r\n");
break;
}
@ -640,16 +642,23 @@ void mqtt_socket_timer(void *arg)
// 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");
}
@ -675,6 +684,7 @@ static int mqtt_socket_client( lua_State* L )
// create a object
mud = (lmqtt_userdata *)lua_newuserdata(L, sizeof(lmqtt_userdata));
c_memset(mud, 0, sizeof(*mud));
// pre-initialize it, in case of errors
mud->self_ref = LUA_NOREF;
mud->cb_connect_ref = LUA_NOREF;
@ -685,18 +695,8 @@ static int mqtt_socket_client( lua_State* L )
mud->cb_suback_ref = LUA_NOREF;
mud->cb_unsuback_ref = LUA_NOREF;
mud->cb_puback_ref = LUA_NOREF;
mud->pesp_conn = NULL;
#ifdef CLIENT_SSL_ENABLE
mud->secure = 0;
#endif
mud->keep_alive_tick = 0;
mud->event_timeout = 0;
mud->connState = MQTT_INIT;
mud->connected = false;
c_memset(&mud->mqttTimer, 0, sizeof(ETSTimer));
c_memset(&mud->mqtt_state, 0, sizeof(mqtt_state_t));
c_memset(&mud->connect_info, 0, sizeof(mqtt_connect_info_t));
// set its metatable
luaL_getmetatable(L, "mqtt.socket");