如何通过Qt 5在局域网上唤醒？

Question

我在局域网上找到了本教程，但是我不能完全理解它。它是用Qt3实现的。我想要唤醒局域网的功能，可以用Qt5编译。如何使用上述代码通过局域网使用Qt5唤醒计算机？

Answer 1

下面是一个用Qt 5编译的局域网上的wake实现。该函数以目标计算机的MAC地址为参数，并广播相关的UDP数据包：

void MyClass::wakeOnLan(QString MAC)
{
    char MACAddr [6];
    char MagicPacket [102]; // Magic package for remote boot

    int j = sscanf (MAC.toLatin1().data(), "%2x-%2x-%2x-%2x-%2x-%2x",
                    & MACAddr [0], & MACAddr [1], & MACAddr [2], & MACAddr [3], & MACAddr [4], & MACAddr [5]);

    // Set to hexadecimal before the magicpacket array 6 characters ff
    memset (MagicPacket, 0xff, 6);

    int packetsize = 6; // the beginning of the initial value is 6, do not wrong. I is because the effect of the initial value of the written as 0, it is too effortless.
    // Build MagicPacket.
    for (int i = 0; i <16; i++)
    {
        memcpy (MagicPacket + packetsize, MACAddr, 6);
        packetsize += 6;
    }

    QHostAddress FakeAddress;
    FakeAddress.setAddress ("192.168.0.255");

    QUdpSocket udpSocket;
    udpSocket.writeDatagram(MagicPacket, 102, FakeAddress, 9);
}