如何通过 Qt 5 进行 LAN 唤醒？

Question

我找到this tutorial 用于局域网唤醒，但我无法完全理解。它在 Qt3 中实现。我想要可以用 Qt5 编译的 LAN 唤醒功能。如何使用上述代码使用 Qt5 通过 LAN 唤醒计算机？

Answer 1

这是一个使用 Qt 5 编译的局域网唤醒的实现。该函数将目标计算机的 MAC 地址作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);
}