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Adds a config flag to allow an empty client id

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This commit covers a use case where the user can select to send an
empty user id.
This commit is contained in:
Euripedes Rocha
2021-10-14 11:00:45 -03:00
committed by David Cermak
parent 36de30e46d
commit 1fd50dd2cb
3 changed files with 22 additions and 12 deletions
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11
lib/mqtt_msg.c
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@@ -361,7 +361,7 @@ mqtt_message_t *mqtt_msg_connect(mqtt_connection_t *connection, mqtt_connect_inf
if (connection->message.length + header_len > connection->buffer_length) {
return fail_message(connection);
}
char* variable_header = (void *)(connection->buffer + connection->message.length);
char *variable_header = (char *)(connection->buffer + connection->message.length);
connection->message.length += header_len;
int header_idx = 0;
@@ -394,7 +394,9 @@ mqtt_message_t *mqtt_msg_connect(mqtt_connection_t *connection, mqtt_connect_inf
return fail_message(connection);
}
} else {
return fail_message(connection);
if (append_string(connection, "", 0) < 0) {
return fail_message(connection);
}
}
if (info->will_topic != NULL && info->will_topic[0] != '\0') {
@@ -456,7 +458,7 @@ mqtt_message_t *mqtt_msg_publish(mqtt_connection_t *connection, const char *topi
}
if (data == NULL && data_length > 0) {
return fail_message(connection);
return fail_message(connection);
}
if (qos > 0) {
@@ -474,8 +476,7 @@ mqtt_message_t *mqtt_msg_publish(mqtt_connection_t *connection, const char *topi
connection->message.length = connection->buffer_length;
connection->message.fragmented_msg_total_length = data_length + connection->message.fragmented_msg_data_offset;
} else {
if (data != NULL)
{
if (data != NULL) {
memcpy(connection->buffer + connection->message.length, data, data_length);
connection->message.length += data_length;
}