dns64_get_mem(struct module_env* env, int id)
{
    struct dns64_env* dns64_env = (struct dns64_env*)env->modinfo[id];
    if (!dns64_env)
        return 0;
    return sizeof(*dns64_env);
}
dns64_get_mem(struct module_env* env, int id)
{
    struct dns64_env* dns64_env = (struct dns64_env*)env->modinfo[id];
    if (!dns64_env)
        return 0;
    return sizeof(*dns64_env);
}