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added a fix for incomplete header message received (topic or data could not be resolved from msg)

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This commit is contained in:
David Cermak
2018-12-04 15:29:14 +01:00
parent db64b79120
commit cf5b8eda89
1 changed files with 35 additions and 24 deletions
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59
mqtt_client.c
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@@ -511,23 +511,32 @@ typedef struct {
static void deliver_publish(esp_mqtt_client_handle_t client, uint8_t *message, int length)
{
const char *mqtt_topic, *mqtt_data;
const char *mqtt_topic = NULL, *mqtt_data = NULL;
uint32_t mqtt_topic_length, mqtt_data_length;
uint32_t mqtt_len, mqtt_offset = 0, total_mqtt_len = 0;
int len_read;
uint32_t mqtt_len = 0, mqtt_offset = 0, total_mqtt_len = 0;
int len_read= length;
int max_to_read = client->mqtt_state.in_buffer_length;
int buffer_offset = 0;
esp_transport_handle_t transport = client->transport;
do
{
if (total_mqtt_len == 0) {
mqtt_topic_length = length;
mqtt_topic = mqtt_get_publish_topic(message, &mqtt_topic_length);
mqtt_data_length = length;
mqtt_data = mqtt_get_publish_data(message, &mqtt_data_length);
total_mqtt_len = client->mqtt_state.message_length - client->mqtt_state.message_length_read + mqtt_data_length;
mqtt_len = mqtt_data_length;
/* any further reading only the underlying payload */
transport = esp_transport_get_payload_transport_handle(transport);
mqtt_data_length = mqtt_topic_length = length;
if (NULL == (mqtt_topic = mqtt_get_publish_topic(message, &mqtt_topic_length)) ||
NULL == (mqtt_data = mqtt_get_publish_data(message, &mqtt_data_length)) ) {
// mqtt header is not complete, continue reading
memmove(client->mqtt_state.in_buffer, message, length);
buffer_offset = length;
message = client->mqtt_state.in_buffer;
max_to_read = client->mqtt_state.in_buffer_length - length;
mqtt_len = 0;
} else {
total_mqtt_len = client->mqtt_state.message_length - client->mqtt_state.message_length_read + mqtt_data_length;
mqtt_len = mqtt_data_length;
}
} else {
mqtt_len = len_read;
mqtt_data = (const char*)client->mqtt_state.in_buffer;
@@ -535,15 +544,17 @@ static void deliver_publish(esp_mqtt_client_handle_t client, uint8_t *message, i
mqtt_topic_length = 0;
}
ESP_LOGD(TAG, "Get data len= %d, topic len=%d", mqtt_len, mqtt_topic_length);
client->event.event_id = MQTT_EVENT_DATA;
client->event.data = (char *)mqtt_data;
client->event.data_len = mqtt_len;
client->event.total_data_len = total_mqtt_len;
client->event.current_data_offset = mqtt_offset;
client->event.topic = (char *)mqtt_topic;
client->event.topic_len = mqtt_topic_length;
esp_mqtt_dispatch_event(client);
if (total_mqtt_len != 0) {
ESP_LOGD(TAG, "Get data len= %d, topic len=%d", mqtt_len, mqtt_topic_length);
client->event.event_id = MQTT_EVENT_DATA;
client->event.data = (char *)mqtt_data;
client->event.data_len = mqtt_len;
client->event.total_data_len = total_mqtt_len;
client->event.current_data_offset = mqtt_offset;
client->event.topic = (char *)mqtt_topic;
client->event.topic_len = mqtt_topic_length;
esp_mqtt_dispatch_event(client);
}
mqtt_offset += mqtt_len;
if (client->mqtt_state.message_length_read >= client->mqtt_state.message_length) {
@@ -551,10 +562,13 @@ static void deliver_publish(esp_mqtt_client_handle_t client, uint8_t *message, i
}
len_read = esp_transport_read(transport,
(char *)client->mqtt_state.in_buffer,
client->mqtt_state.message_length - client->mqtt_state.message_length_read > client->mqtt_state.in_buffer_length ?
client->mqtt_state.in_buffer_length : client->mqtt_state.message_length - client->mqtt_state.message_length_read,
(char *)client->mqtt_state.in_buffer + buffer_offset,
client->mqtt_state.message_length - client->mqtt_state.message_length_read > max_to_read ?
max_to_read : client->mqtt_state.message_length - client->mqtt_state.message_length_read,
client->config->network_timeout_ms);
length = len_read + buffer_offset;
buffer_offset = 0;
max_to_read = client->mqtt_state.in_buffer_length;
if (len_read <= 0) {
ESP_LOGE(TAG, "Read error or timeout: %d", errno);
break;
@@ -562,7 +576,6 @@ static void deliver_publish(esp_mqtt_client_handle_t client, uint8_t *message, i
client->mqtt_state.message_length_read += len_read;
} while (1);
}
static bool is_valid_mqtt_msg(esp_mqtt_client_handle_t client, int msg_type, int msg_id)
@@ -667,8 +680,6 @@ static esp_err_t mqtt_process_receive(esp_mqtt_client_handle_t client)
client->mqtt_state.message_length = mqtt_get_total_length(&client->mqtt_state.in_buffer[transport_message_offset], client->mqtt_state.message_length_read);
ESP_LOGI(TAG, "deliver_publish, message_length_read=%d, message_length=%d", read_len, client->mqtt_state.message_length);
deliver_publish(client, &client->mqtt_state.in_buffer[transport_message_offset], client->mqtt_state.message_length_read);
deliver_publish(client, client->mqtt_state.in_buffer, client->mqtt_state.message_length_read);
break;
case MQTT_MSG_TYPE_PUBACK:
if (is_valid_mqtt_msg(client, MQTT_MSG_TYPE_PUBLISH, msg_id)) {