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utilizing pingreq to check if server is still reachable

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This commit is contained in:
Tijn Kooijmans
2017-07-26 13:46:34 +02:00
parent b5761d5312
commit f49ecd1b92
1 changed files with 24 additions and 20 deletions
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44
mqtt.c
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@@ -259,7 +259,7 @@ static bool mqtt_connect(mqtt_client *client)
write_len = client->settings->write_cb(client,
client->mqtt_state.outbound_message->data,
client->mqtt_state.outbound_message->length, 0);
if(write_len < 0) {
if (write_len <= 0) {
mqtt_error("Writing failed: %d", errno);
return false;
}
@@ -304,7 +304,7 @@ void mqtt_sending_task(void *pvParameters)
{
mqtt_client *client = (mqtt_client *)pvParameters;
uint32_t msg_len;
int send_len;
int send_len, read_len;
mqtt_info("mqtt_sending_task");
while (1) {
@@ -319,8 +319,8 @@ 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, 10 * 1000);
if (send_len <= 0) {
mqtt_info("Write error: %d", errno);
break; // TODO is this right handling?
}
@@ -328,24 +328,27 @@ void mqtt_sending_task(void *pvParameters)
//TODO: Check sending type, to callback publish message
msg_len -= send_len;
}
//invalidate keepalive timer
client->keepalive_tick = client->settings->keepalive / 2;
}
else {
if (client->keepalive_tick > 0) client->keepalive_tick --;
else {
client->keepalive_tick = client->settings->keepalive / 2;
client->mqtt_state.outbound_message = mqtt_msg_pingreq(&client->mqtt_state.mqtt_connection);
client->mqtt_state.pending_msg_type = mqtt_get_type(client->mqtt_state.outbound_message->data);
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,
client->mqtt_state.outbound_message->data,
client->mqtt_state.outbound_message->length, 0);
}
}
if (client->keepalive_tick > 0) client->keepalive_tick --;
else {
client->keepalive_tick = client->settings->keepalive / 2;
client->mqtt_state.outbound_message = mqtt_msg_pingreq(&client->mqtt_state.mqtt_connection);
client->mqtt_state.pending_msg_type = mqtt_get_type(client->mqtt_state.outbound_message->data);
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,
client->mqtt_state.outbound_message->data,
client->mqtt_state.outbound_message->length, 0);
read_len = client->settings->read_cb(client, client->mqtt_state.in_buffer, CONFIG_MQTT_BUFFER_SIZE_BYTE, 10 * 1000);
if (read_len < 0) {
mqtt_error("Error network response");
break;
}
}
}
xMqttSendingTask = NULL;
vTaskDelete(NULL);
}
@@ -399,6 +402,7 @@ 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);