1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtNetwork>
class Server : public QObject
{
Q_OBJECT
public:
Server() { connect(&serverSocket, &QIODevice::readyRead, this, &Server::sendEcho); }
bool bind(quint16 port)
{
const bool result = serverSocket.bind(QHostAddress::Any, port,
QUdpSocket::ReuseAddressHint
| QUdpSocket::ShareAddress);
if (result) {
printf("OK\n");
} else {
printf("FAILED: %s\n", qPrintable(serverSocket.errorString()));
}
fflush(stdout);
return result;
}
private slots:
void sendEcho()
{
QHostAddress senderAddress;
quint16 senderPort;
char data[1024];
qint64 bytes = serverSocket.readDatagram(data, sizeof(data), &senderAddress, &senderPort);
if (bytes == 1 && data[0] == '\0')
QCoreApplication::instance()->quit();
for (int i = 0; i < bytes; ++i)
data[i] += 1;
serverSocket.writeDatagram(data, bytes, senderAddress, senderPort);
}
private:
QUdpSocket serverSocket;
};
int main(int argc, char **argv)
{
QCoreApplication app(argc, argv);
QStringList arguments = QCoreApplication::arguments();
arguments.pop_front();
quint16 port = 0;
if (!arguments.isEmpty())
port = arguments.constFirst().toUShort();
if (!port) {
printf("Specify port number\n");
return -1;
}
Server server;
if (!server.bind(port))
return -2;
return app.exec();
}
#include "main.moc"
|
