我有问题QUdpSocket
。我想创建一个简单的程序来使用UDP protokol发送和接收数据。我已经阅读了许多类似的话题,但我没有找到解决办法。通信只为QHostAdress::LocalHost
工作,然后我给这个相同的数据发送,但如果我想发送数据到外部设置具体地址,例如194.181.161.134
,那不起作用。这意味着数据发送,但我无法收到。这是我的代码:QUdpSocket:程序发送但没有收到
class Okno_GL : public QMainWindow
{
Q_OBJECT
public:
explicit Okno_GL(QWidget *parent = 0);
QWidget *wg;
QPushButton *pb;
QPushButton *pl;
QGridLayout *gr;
QUdpSocket *socket;
QHostAddress host;
QHostAddress bcast;
signals:
public slots:
void SLOT_Write();
void SLOT_load();
};
class Receiver : public QObject
{
Q_OBJECT
public:
Receiver();
QUdpSocket *udpSocket;
public slots:
void SLOT_processPendingDatagrams();
void SLOT_StCh(QAbstractSocket::SocketState state);
};
Okno_GL::Okno_GL(QWidget *parent) :
QMainWindow(parent)
{
pb = new QPushButton("write" , this);
pl = new QPushButton("read" , this);
wg = new QWidget(this);
setCentralWidget(wg);
gr = new QGridLayout(wg);
gr->addWidget(pb);
gr->addWidget(pl);
socket = new QUdpSocket(this);
connect(pb , SIGNAL(clicked()) , SLOT(SLOT_Write()));
connect(pl , SIGNAL(clicked()) , SLOT(SLOT_load()));
}
void Okno_GL::SLOT_Write()
{
QByteArray datagram = "gS";
int send;
send = socket->writeDatagram(datagram.data(), QHostAddress("194.181.161.134"), 1200);
}
void Okno_GL::SLOT_load()
{
}
Receiver::Receiver()
{
udpSocket = new QUdpSocket(this);
connect(udpSocket, SIGNAL(stateChanged(QAbstractSocket::SocketState)) , this , SLOT(SLOT_StCh(QAbstractSocket::SocketState)));
if(udpSocket->bind(QHostAddress::Any , 1200))
{
qd "bind";
}
else
{
qd "not bind";
}
}
void Receiver::SLOT_processPendingDatagrams()
{
qd "receiver";
QByteArray datagram;
do {
datagram.resize(udpSocket->pendingDatagramSize());
udpSocket->readDatagram(datagram.data(), datagram.size());
} while (udpSocket->hasPendingDatagrams());
qd "datagram" << datagram;
}
void Receiver::SLOT_StCh(QAbstractSocket::SocketState state)
{
qd "slot" << state;
QByteArray datagram = "gS";
if (state == QAbstractSocket::BoundState) {
connect(udpSocket, SIGNAL(readyRead()), this, SLOT(SLOT_processPendingDatagrams()) , Qt::QueuedConnection);
}
}
是'Receiver'创建的某个对象? – Blueman 2014-10-20 20:00:09
验证一个重要的事情:你能在接收机上的Wireshark中看到数据包吗? – jturcotte 2014-10-20 20:03:51
哦,对不起。 Ofcourse对象Receiver在主对象Okno_GL中创建。 Ofocourse冷杉是创造Okno_GL。 jtucotte好的,我嚼了这个,并给予答复 – FanQt 2014-10-20 20:37:16