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mqtt_client: Manage disconnect packet

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In the mqtt5 protocol the broker can disconnect the client with
a disconnect packet. This packet contains a reason value that can be
useful for certain applications in which it is important to know
the reason of disconnection.
While the client is connected is possible that a disconnect packet
is reaceived by the broker to force a disconnection. Before this
patch this approach causes a generic error on transport in case of
disconnection from the broker. If the packet is managed before getting
an error it is possible to save the reason code in the
disconnect_return_code variable in the error_handle, and dispatch
the disconnect event that can be managed by the application event
loop, that now can know the reason of disconnection from the broker.
Reset the variable in case of error.

Signed-off-by: Flavia Caforio <flavia.caforio@amarulasolutions.com>
This commit is contained in:
Flavia Caforio
2025-02-18 16:24:13 +01:00
parent 7e5e4821fa
commit 470cb93049
5 changed files with 31 additions and 2 deletions
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1
lib/include/mqtt5_client_priv.h
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@@ -42,6 +42,7 @@ void esp_mqtt5_parse_pubcomp(esp_mqtt5_client_handle_t client);
void esp_mqtt5_parse_puback(esp_mqtt5_client_handle_t client);
void esp_mqtt5_parse_unsuback(esp_mqtt5_client_handle_t client);
void esp_mqtt5_parse_suback(esp_mqtt5_client_handle_t client);
void esp_mqtt5_parse_disconnect(esp_mqtt5_client_handle_t client, int *disconnect_rsp_code);
esp_err_t esp_mqtt5_parse_connack(esp_mqtt5_client_handle_t client, int *connect_rsp_code);
void esp_mqtt5_client_destory(esp_mqtt5_client_handle_t client);
esp_err_t esp_mqtt5_client_publish_check(esp_mqtt5_client_handle_t client, int qos, int retain);