| 51039869 |
2018-03-06 16:20 |
QT UDP加入组播失败
imx6dl开发板，linux4.9+qt5.8环境，调用joinMulticastGroup返回false，打印的socket->error()是QAbstractSocket::UnknownSocketError。
以下是代码。有人知道返回false的原因吗?
bool result = false;
m_udpsocket_recive = new QUdpSocket(this);
QHostAddress mcast_addr("224.0.0.17");
result = m_udpsocket_recive->bind(QHostAddress::AnyIPv4,45454, QUdpSocket::ReuseAddressHint);
qDebug()<<"Phone_Init1 result"<<result;
qDebug()<<"Phone_Init1 "<<m_udpsocket_recive->error();
qDebug()<<"Phone_Init1 "<<m_udpsocket_recive->state();
result = m_udpsocket_recive->joinMulticastGroup(mcast_addr);
qDebug()<<"Phone_Init result"<<result;
qDebug()<<"Phone_Init "<<m_udpsocket_recive->error();
qDebug()<<"Phone_Init "<<m_udpsocket_recive->state();
connect(m_udpsocket_recive, SIGNAL(readyRead()),this, SLOT(RecvDateSlot()));
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