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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtNetwork>
class ClientServer : public QUdpSocket
{
Q_OBJECT
public:
enum Type {
ConnectedClient,
UnconnectedClient,
Server
};
ClientServer(Type type, const QString &host, quint16 port)
: type(type)
{
switch (type) {
case Server:
if (bind(0, ShareAddress | ReuseAddressHint)) {
printf("%d\n", localPort());
} else {
printf("XXX\n");
}
break;
case ConnectedClient:
connectToHost(host, port);
startTimer(250);
printf("ok\n");
break;
case UnconnectedClient:
peerAddress = QHostAddress(host);
peerPort = port;
if (bind(QHostAddress::Any, port + 1, ShareAddress | ReuseAddressHint)) {
startTimer(250);
printf("ok\n");
} else {
printf("XXX\n");
}
break;
}
fflush(stdout);
connect(this, SIGNAL(readyRead()), this, SLOT(readTestData()));
}
protected:
void timerEvent(QTimerEvent *event) override
{
static int n = 0;
switch (type) {
case ConnectedClient:
write(QByteArray::number(n++));
break;
case UnconnectedClient:
writeDatagram(QByteArray::number(n++), peerAddress, peerPort);
break;
default:
break;
}
QUdpSocket::timerEvent(event);
}
private slots:
void readTestData()
{
printf("readData()\n");
switch (type) {
case ConnectedClient: {
while (bytesAvailable() || hasPendingDatagrams()) {
QByteArray data = readAll();
printf("got %d\n", data.toInt());
}
break;
}
case UnconnectedClient: {
while (hasPendingDatagrams()) {
QByteArray data;
data.resize(pendingDatagramSize());
readDatagram(data.data(), data.size());
printf("got %d\n", data.toInt());
}
break;
}
case Server: {
while (hasPendingDatagrams()) {
QHostAddress sender;
quint16 senderPort;
QByteArray data;
data.resize(pendingDatagramSize());
readDatagram(data.data(), data.size(), &sender, &senderPort);
printf("got %d\n", data.toInt());
printf("sending %d\n", data.toInt() * 2);
writeDatagram(QByteArray::number(data.toInt() * 2), sender, senderPort);
}
break;
}
}
fflush(stdout);
}
private:
Type type;
QHostAddress peerAddress;
quint16 peerPort;
};
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
ClientServer::Type type;
if (app.arguments().size() < 4) {
qDebug("usage: %s [ConnectedClient <server> <port>|UnconnectedClient <server> <port>|Server]", argv[0]);
return 1;
}
QString arg = app.arguments().at(1).trimmed().toLower();
if (arg == "connectedclient") {
type = ClientServer::ConnectedClient;
} else if (arg == "unconnectedclient") {
type = ClientServer::UnconnectedClient;
} else if (arg == "server") {
type = ClientServer::Server;
} else {
qDebug("usage: %s [ConnectedClient <server> <port>|UnconnectedClient <server> <port>|Server]", argv[0]);
return 1;
}
ClientServer clientServer(type, app.arguments().at(2),
app.arguments().at(3).toInt());
return app.exec();
}
#include "main.moc"
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