dns64_deinit(struct module_env* env, int id)
{
    struct dns64_env* dns64_env;
    if (!env)
        return;
    dns64_env = (struct dns64_env*)env->modinfo[id];
    if(dns64_env) {
	    traverse_postorder(&dns64_env->ignore_aaaa, free_ignore_aaaa_node,
	    	NULL);
    }
    free(env->modinfo[id]);
    env->modinfo[id] = NULL;
}
dns64_deinit(struct module_env* env, int id)
{
    struct dns64_env* dns64_env;
    if (!env)
        return;
    dns64_env = (struct dns64_env*)env->modinfo[id];
    if(dns64_env) {
	    traverse_postorder(&dns64_env->ignore_aaaa, free_ignore_aaaa_node,
	    	NULL);
    }
    free(env->modinfo[id]);
    env->modinfo[id] = NULL;
}