Qt 的udpSocket通信

udpSocket = new QUdpSocket(this); 
QByteArray datagram = "blog.const.net.cn"; 
udpSocket->writeDatagram(datagram.data(), datagram.size(), QHostAddress::Broadcast, 45454); 
udpSocket->bind(QHostAddress("192.168.1.104"), 45454); 

UDP客户端广播
QUdpSocket *udpsocket1 = new QUdpSocket(this);
QByteArray datagram = "http://blog.const.net.cn"; udpsocket1->writeDatagram(datagram.data(),datagram.size(), QHostAddress::Broadcast,ui->spinBox->text().toInt());


UDP客户端发送到指定IP
QUdpSocket *udpsocket1 = new QUdpSocket(this);
QByteArray datagram = "http://blog.const.net.cn"; udpsocket1->writeDatagram(datagram.data(),datagram.size(), QHostAddress("192.168.1.104"),ui->spinBox->text().toInt());

收数据
connect(udpsocket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams())); 
while (udpsocket->hasPendingDatagrams()) 
{ 
QByteArray datagram; 
datagram.resize(udpsocket->pendingDatagramSize()); 
QHostAddress sender; 
quint16 senderPort; 
udpsocket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort); 
qDebug()<<datagram.data()<<datagram.size()<<senderPort<<sender.toString(); //processTheDatagram(datagram);
}