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Merge pull request #10 from StudioSophisti/master

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improved disconnect/reconnect cycle
This commit is contained in:
Tuan PM
2017-08-09 19:33:33 +08:00
committed by GitHub
parent 9822cb2694 559c977dda
commit 9fb3ca3ae3
2 changed files with 79 additions and 39 deletions
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5
include/mqtt.h
View File

@@ -1,6 +1,7 @@
#ifndef _MQTT_H_
#define _MQTT_H_
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "mqtt_config.h"
#include "mqtt_msg.h"
@@ -44,8 +45,7 @@ typedef struct mqtt_settings {
mqtt_write_callback write_cb;
mqtt_event_callback connected_cb;
mqtt_event_callback disconnected_cb; // unused
mqtt_event_callback reconnect_cb; // unused
mqtt_event_callback disconnected_cb;
mqtt_event_callback subscribe_cb;
mqtt_event_callback publish_cb;
@@ -63,6 +63,7 @@ typedef struct mqtt_settings {
uint32_t lwt_retain;
uint32_t clean_session;
uint32_t keepalive;
bool auto_reconnect;
} mqtt_settings;
typedef struct mqtt_event_data_t

113
mqtt.c
View File

@@ -19,6 +19,7 @@
static TaskHandle_t xMqttTask = NULL;
static TaskHandle_t xMqttSendingTask = NULL;
static bool terminate_mqtt = false;
static int resolve_dns(const char *host, struct sockaddr_in *ip) {
struct hostent *he;
@@ -149,28 +150,28 @@ static bool client_connect(mqtt_client *client)
// including SSL objects if CNFIG_MQTT_SECURITY_ON is enabled
void closeclient(mqtt_client *client)
{
mqtt_info("Closing client socket");
if (client->socket != -1)
{
close(client->socket);
client->socket = -1;
}
#if defined(CONFIG_MQTT_SECURITY_ON)
if (client->ssl != NULL)
{
SSL_shutdown(client->ssl);
if (client->ssl != NULL)
{
SSL_shutdown(client->ssl);
SSL_free(client->ssl);
client->ssl = NULL;
}
#endif
if (client->socket != -1)
{
close(client->socket);
client->socket = -1;
}
SSL_free(client->ssl);
client->ssl = NULL;
}
#if defined(CONFIG_MQTT_SECURITY_ON)
if (client->ctx != NULL)
{
SSL_CTX_free(client->ctx);
client->ctx = NULL;
}
if (client->ctx != NULL)
{
SSL_CTX_free(client->ctx);
client->ctx = NULL;
}
#endif
}
@@ -287,7 +288,7 @@ static bool mqtt_connect(mqtt_client *client)
mqtt_warn("Connection refused, server unavailable");
return false;
case CONNECTION_REFUSE_BAD_USERNAME:
mqtt_warn("Connection refused, bad username");
mqtt_warn("Connection refused, bad username or password");
return false;
case CONNECTION_REFUSE_NOT_AUTHORIZED:
mqtt_warn("Connection refused, not authorized");
@@ -304,9 +305,10 @@ void mqtt_sending_task(void *pvParameters)
mqtt_client *client = (mqtt_client *)pvParameters;
uint32_t msg_len;
int send_len;
bool connected = true;
mqtt_info("mqtt_sending_task");
while (1) {
while (connected) {
if (xQueueReceive(client->xSendingQueue, &msg_len, 1000 / portTICK_RATE_MS)) {
//queue available
while (msg_len > 0) {
@@ -318,10 +320,11 @@ void mqtt_sending_task(void *pvParameters)
rb_read(&client->send_rb, client->mqtt_state.out_buffer, send_len);
client->mqtt_state.pending_msg_type = mqtt_get_type(client->mqtt_state.out_buffer);
client->mqtt_state.pending_msg_id = mqtt_get_id(client->mqtt_state.out_buffer, send_len);
send_len = client->settings->write_cb(client, client->mqtt_state.out_buffer, send_len, 0);
if(send_len < 0) {
send_len = client->settings->write_cb(client, client->mqtt_state.out_buffer, send_len, 5 * 1000);
if(send_len <= 0) {
mqtt_info("Write error: %d", errno);
break; // TODO is this right handling?
connected = false;
break;
}
//TODO: Check sending type, to callback publish message
@@ -339,12 +342,19 @@ void mqtt_sending_task(void *pvParameters)
client->mqtt_state.pending_msg_id = mqtt_get_id(client->mqtt_state.outbound_message->data,
client->mqtt_state.outbound_message->length);
mqtt_info("Sending pingreq");
client->settings->write_cb(client,
send_len = client->settings->write_cb(client,
client->mqtt_state.outbound_message->data,
client->mqtt_state.outbound_message->length, 0);
if(send_len <= 0) {
mqtt_info("Write error: %d", errno);
connected = false;
break;
}
}
}
}
closeclient(client);
xMqttSendingTask = NULL;
vTaskDelete(NULL);
}
@@ -397,18 +407,18 @@ void mqtt_start_receive_schedule(mqtt_client *client)
while (1) {
if (terminate_mqtt) break;
if (xMqttSendingTask == NULL) break;
read_len = client->settings->read_cb(client, client->mqtt_state.in_buffer, CONFIG_MQTT_BUFFER_SIZE_BYTE, 0);
mqtt_info("Read len %d", read_len);
if (read_len == 0)
break;
if (read_len < 0) {
if (read_len <= 0) {
// ECONNRESET for example
mqtt_info("Read error %d", errno);
break;
}
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);
@@ -477,29 +487,46 @@ void mqtt_start_receive_schedule(mqtt_client *client)
break;
}
}
mqtt_info("network disconnected");
}
void mqtt_destroy(mqtt_client *client)
{
if (client == NULL) return;
vQueueDelete(client->xSendingQueue);
free(client->mqtt_state.in_buffer);
free(client->mqtt_state.out_buffer);
free(client->send_rb.p_o);
free(client);
vTaskDelete(xMqttTask);
mqtt_info("Client destroyed");
}
void mqtt_task(void *pvParameters)
{
mqtt_info("Starting mqtt task");
mqtt_client *client = (mqtt_client *)pvParameters;
while (1) {
if (terminate_mqtt) break;
client->settings->connect_cb(client);
mqtt_info("Connected to server %s:%d", client->settings->host, client->settings->port);
if (!mqtt_connect(client)) {
client->settings->disconnect_cb(client);
continue;
//return;
if (client->settings->disconnected_cb) {
client->settings->disconnected_cb(client, NULL);
}
if (!client->settings->auto_reconnect) {
break;
} else {
continue;
}
}
mqtt_info("Connected to MQTT broker, create sending thread before call connected callback");
xTaskCreate(&mqtt_sending_task, "mqtt_sending_task", 2048, client, CONFIG_MQTT_PRIORITY + 1, &xMqttSendingTask);
@@ -511,17 +538,29 @@ void mqtt_task(void *pvParameters)
mqtt_start_receive_schedule(client);
client->settings->disconnect_cb(client);
vTaskDelete(xMqttSendingTask);
if (client->settings->disconnected_cb) {
client->settings->disconnected_cb(client, NULL);
}
if (xMqttSendingTask != NULL) {
vTaskDelete(xMqttSendingTask);
}
if (!client->settings->auto_reconnect) {
break;
}
vTaskDelay(1000 / portTICK_RATE_MS);
}
mqtt_destroy(client);
xMqttTask = NULL;
vTaskDelete(NULL);
}
mqtt_client *mqtt_start(mqtt_settings *settings)
{
terminate_mqtt = false;
int stackSize = 2048;
uint8_t *rb_buf;
@@ -623,7 +662,7 @@ void mqtt_publish(mqtt_client* client, const char *topic, const char *data, int
qos, retain,
&client->mqtt_state.pending_msg_id);
mqtt_queue(client);
mqtt_info("Queuing publish, length: %d, queue size(%d/%d)\r\n",
mqtt_info("Queuing publish, length: %d, queue size(%d/%d)",
client->mqtt_state.outbound_message->length,
client->send_rb.fill_cnt,
client->send_rb.size);
@@ -631,6 +670,6 @@ void mqtt_publish(mqtt_client* client, const char *topic, const char *data, int
void mqtt_stop()
{
terminate_mqtt = true;
}