import net.fs.rudp.CopiedIterator; //导入依赖的package包/类
void scan() {
    CopiedIterator<String> it = getConnTableIterator();
    while (it.hasNext()) {
        String key = it.next();
        TCPTun tun = connTable.get(key);
        if (tun != null) {
            if (tun.preDataReady) {
                //无数据超时
                long t = System.currentTimeMillis() - tun.lastReceiveDataTime;
                if (t > 6000) {
                    connTable.remove(key);
                    if (capEnv.client) {
                        defaultTcpTun = null;
                        MLog.println("tcp隧道超时");
                    }
                }
            } else {
                //连接中超时
                if (System.currentTimeMillis() - tun.createTime > 5000) {
                    connTable.remove(key);
                }
            }
        }
    }
}
 

import net.fs.rudp.CopiedIterator; //导入依赖的package包/类
CopiedIterator<String> getConnTableIterator() {
    CopiedIterator<String> it;
    synchronized (syn_scan) {
        it = new CopiedIterator<>(connTable.keySet().iterator());
    }
    return it;
}