diff options
author | Timur Pocheptsov <timur.pocheptsov@qt.io> | 2018-03-23 12:30:31 +0100 |
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committer | Timur Pocheptsov <timur.pocheptsov@qt.io> | 2018-06-22 13:09:42 +0000 |
commit | 033a1a279311fd2eda02e4c90657542f688b5f8b (patch) | |
tree | 492cf80917e2ed9f5e5256d82b9ef21d0ae64b41 /examples/network/secureudpclient/association.h | |
parent | f5fe9fc5a4136a696f07c4bd3567d85348ec42d9 (diff) |
Add a secure UDP client example
A simple application that establishes DTLS connection(s) and
sends/receives datagrams. Class DtlsAssociation is
essentially a QUdpSocket|QDtls pair: it initiates a handshake,
handles timeouts and errors. After establishing an encrypted
connection it sends messages to the server and processes responses.
Task-number: QTBUG-67596
Change-Id: I92d481b7dfd2459e6a93c754b338a2e897a7feaf
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Diffstat (limited to 'examples/network/secureudpclient/association.h')
-rw-r--r-- | examples/network/secureudpclient/association.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/examples/network/secureudpclient/association.h b/examples/network/secureudpclient/association.h new file mode 100644 index 0000000000..08fc28e3ed --- /dev/null +++ b/examples/network/secureudpclient/association.h @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#ifndef ASSOCIATION_H +#define ASSOCIATION_H + +#include <QtNetwork> +#include <QtCore> + +QT_BEGIN_NAMESPACE + +class DtlsAssociation : public QObject +{ + Q_OBJECT + +public: + + DtlsAssociation(const QHostAddress &address, quint16 port, + const QString &connectionName); + ~DtlsAssociation(); + void startHandshake(); + +signals: + + void errorMessage(const QString &message); + void warningMessage(const QString &message); + void infoMessage(const QString &message); + void serverResponse(const QString &clientInfo, const QByteArray &datagraam, + const QByteArray &plainText); + +private slots: + + void readyRead(); + void handshakeTimeout(); + void pskRequired(QSslPreSharedKeyAuthenticator *auth); + void pingTimeout(); + +private: + + QString name; + QUdpSocket socket; + QDtls crypto; + + QTimer pingTimer; + unsigned ping = 0; + + Q_DISABLE_COPY(DtlsAssociation) +}; + +QT_END_NAMESPACE + +#endif // ASSOCIATION_H |