qt5base-lts/examples/network/secureudpserver/server.h
Timur Pocheptsov ed775e794c Add a secure UDP server example
It's a simple DTLS server, implemented with QUdpSocket,
QDtlsClientVerifier and QDtls. The server is configured
to use PSK only (it has no certificate/key).

The server uses a single QUdpSocket socket and
de-multiplexes UDP datagrams internally (thus
it can work with several clients simultaneously).

Future update will probably add more options (like
configuring with certificate/key, etc). For now -
it's as minimalistic and simple as possible.

Task-number: QTBUG-67596
Change-Id: Ic7d18dbab6dbcc9ed44c82e69a2b364df24aa256
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
2018-06-21 17:01:03 +00:00

110 lines
3.7 KiB
C++

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#ifndef SERVER_H
#define SERVER_H
#include <QtCore>
#include <QtNetwork>
#include <vector>
QT_BEGIN_NAMESPACE
class DtlsServer : public QObject
{
Q_OBJECT
public:
DtlsServer();
~DtlsServer();
bool listen(const QHostAddress &address, quint16 port);
bool isListening() const;
void close();
signals:
void errorMessage(const QString &message);
void warningMessage(const QString &message);
void infoMessage(const QString &message);
void datagramReceived(const QString &peerInfo, const QByteArray &cipherText,
const QByteArray &plainText);
private slots:
void readyRead();
void pskRequired(QSslPreSharedKeyAuthenticator *auth);
private:
void handleNewConnection(const QHostAddress &peerAddress, quint16 peerPort,
const QByteArray &clientHello);
using DtlsConnection = QSharedPointer<QDtls>;
void doHandshake(DtlsConnection newConnection, const QByteArray &clientHello);
void decryptDatagram(DtlsConnection connection, const QByteArray &clientMessage);
void shutdown();
bool listening = false;
QUdpSocket serverSocket;
QSslConfiguration serverConfiguration;
QDtlsClientVerifier cookieSender;
QVector<DtlsConnection> knownClients;
Q_DISABLE_COPY(DtlsServer)
};
QT_END_NAMESPACE
#endif // SERVER_H