Correct closing DBus connection - c

Question

Could you explain how to close DBus connection correctly/ Below is my variant:
int P_dbus_proto_init(DBusConnection **dbus_conn, const char *name, dbus_MessageHandler mh, int num_rules, const char **rules)
{
int rc = 0;
DBusError dbus_err;
dbus_error_init(&dbus_err);
*dbus_conn = dbus_bus_get(DBUS_BUS_SYSTEM, &dbus_err);
if (dbus_error_is_set(&dbus_err))
{
FILTER_LOG_ERROR("Connection Error (%s)\n", dbus_err.message);
dbus_error_free(&dbus_err);
return -1;
}
rc = dbus_bus_request_name(*dbus_conn, name, DBUS_NAME_FLAG_REPLACE_EXISTING, &dbus_err);
if (dbus_error_is_set(&dbus_err) || (DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER != rc))
{
FILTER_LOG_ERROR("Connection Error (%s)\n", dbus_err.message);
dbus_error_free(&dbus_err);
return -1;
}
dbus_connection_add_filter(*dbus_conn, mh, NULL, NULL);
if (dbus_error_is_set(&dbus_err))
{
FILTER_LOG_ERROR("Add Filter Error (%s)\n", dbus_err.message);
dbus_error_free(&dbus_err);
return -1;
}
for(int i = 0; i < num_rules; i++)
{
dbus_bus_add_match(*dbus_conn, rules[i], &dbus_err);
if (dbus_error_is_set(&dbus_err))
{
FILTER_LOG_ERROR("Match Error (%s)\n", dbus_err.message);
dbus_error_free(&dbus_err);
return -1;
}
}
return 0;
}
static const char* rules[] = {
"interface='acl_management.method'",
};
And how I use it:
DBusConnection *dbus_conn;
if (P_dbus_proto_init(&dbus_conn, "com.bla-bla-bla.acl", P_dbus_proto_job, 1, rules) == 0)
{
while (dbus_connection_read_write_dispatch(dbus_conn, 5000))
{
if(p_ctx->execute.n_nl_exit_app == 0) //My app can be terminated by n_nl_exit_app flag
{
break;
}
}
dbus_connection_close(dbus_conn);// Should I do it or not?
dbus_connection_unref(dbus_conn);// Should I do it or not?
}
From dbus.freedesktop.org docs I cannot understand how to do it correctly. I can terminate my app by turn on 'n_nl_exit_app' flag - should I call dbus_connection_closein this case?