Qt之UDP多播(组播)的使用

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UdpSocket::UdpSocket(QObject *parent) : QObject(parent) {     //本机IP     QString local_ip = "192.168.101.11";       m_udp_socket = new QUdpSocket(this);     connect(m_udp_socket, &QUdpSocket::readyRead, this, &UdpSocket::received_data);       int ret = m_udp_socket->bind(QHostAddress(local_ip), MULTI_CAST_PORT, QUdpSocket::ShareAddress);     if (!ret) {         qDebug()<<"bind multi cast failed...";     }       QHostAddress multi_address(MULTI_CAST_IP);     bool join_result = m_udp_socket->joinMulticastGroup(multi_address);     if (!join_result) {         qDebug() << "add multi cast group failed...";     }   }   void UdpSocket::received_data() {     QByteArray buffer;     buffer.resize(m_udp_socket->pendingDatagramSize());     m_udp_socket->readDatagram(buffer.data(), buffer.size());       qDebug() << "buffer:" << buffer; }