Qt/C ++:如何获取远程PC(通信对等方)MAC地址? [英] Qt/C++ : How to get remote PC (communication peer) MAC address?

问题描述

我正在Windows 7上使用Qt5.
在我的应用程序( TCP服务器)中，我当前正在使用QTcpSocket类中的一些方法:
-QAbstractSocket::peerAddress()以获取对等地址；
-QAbstractSocket::peerPort()，以获取对等端口.

I am using Qt5 on Windows 7.
In my application (TCP server), I am currently using some methods from QTcpSocket class:
- QAbstractSocket::peerAddress() in order to get the peer address;
- QAbstractSocket::peerPort() in order to get the peer port.

我还想获取通信对等方的 MAC地址.
是否可以在不使用自定义协议的情况下(即无需在我的应用程序与对等方之间交换一些自定义消息)?如果是，怎么办?

I would also want to get the MAC address of the communication peer.
Is this possible, without using a custom protocol (i.e. without having to exchange some custom messages between my app and the peer)? If yes, how?

后期编辑:现在有 一个非常好的解决方案 -我几个月前实施的.我在此期间对其进行了测试，它可以100％完美地工作.享受:)

Late Edit: There is now a very good solution - that I implemented few months ago. I tested it in the meantime and it works 100% flawlessly. Enjoy :)

推荐答案

以下是获取通信对等方的MAC地址的代码.
在后台，它使用Windows命令 arp .
使用在Windows 7上测试过的Qt5.8:

Here is the code to get the MAC address of the communication peer.
Under the hood, it uses the Windows command arp.
Using Qt5.8, tested on Windows 7:

QString getMacForIP(QString ipAddress)
{
    QString MAC;
    QProcess process;
    //
    process.start(QString("arp -a %1").arg(ipAddress));
    if(process.waitForFinished())
    {
        QString result = process.readAll();
        QStringList list = result.split(QRegularExpression("\\s+"));
        if(list.contains(ipAddress))
            MAC = list.at(list.indexOf(ipAddress) + 1);
    }
    //
    return MAC;
}

备注:远程对等方必须位于同一LAN上.
另一点注意:如果IP地址不存在，您将获得一个用于MAC的空字符串.

Remark: remote peer must be on the same LAN.
Another remark: you'll get an empty string for MAC if the IP address is not present.

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