Qt Multicast and Broadcast

sky5641

In my code,receive two kinds of data broadcast and multicast.If using multicast, broadcast data sent to bind port, multicast will receive.I don't know Why?I don't want to receive the broadcast data.

Someone encountered this problem?
@
if (doMulticast){

     m_recvRawSock.bind(Port, QUdpSocket::ShareAddress);
     m_recvRawSock.joinMulticastGroup(QHostAddress(groupAddress));
     connect(&m_recvRawSock,SIGNAL(readyRead()),this,SLOT(process()));

}
else {

    m_recvRawSock.bind(QHostAddress::Any,Port);
    connect(&m_recvRawSock,SIGNAL(readyRead()),this,SLOT(process()));

}@

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Qt Multicast and Broadcast