From 033a1a279311fd2eda02e4c90657542f688b5f8b Mon Sep 17 00:00:00 2001
From: Timur Pocheptsov <timur.pocheptsov@qt.io>
Date: Fri, 23 Mar 2018 12:30:31 +0100
Subject: 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>
---
 examples/network/secureudpclient/addressdialog.cpp | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 examples/network/secureudpclient/addressdialog.cpp

(limited to 'examples/network/secureudpclient/addressdialog.cpp')

diff --git a/examples/network/secureudpclient/addressdialog.cpp b/examples/network/secureudpclient/addressdialog.cpp
new file mode 100644
index 0000000000..ccb58c853c
--- /dev/null
+++ b/examples/network/secureudpclient/addressdialog.cpp
@@ -0,0 +1,118 @@
+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "addressdialog.h"
+#include "ui_addressdialog.h"
+
+#include <QtCore>
+#include <QtNetwork>
+#include <QtWidgets>
+
+#include <limits>
+
+AddressDialog::AddressDialog(QWidget *parent)
+    : QDialog(parent),
+      ui(new Ui::AddressDialog)
+{
+    ui->setupUi(this);
+    setupHostSelector();
+    setupPortSelector();
+}
+
+AddressDialog::~AddressDialog()
+{
+    delete ui;
+}
+
+QString AddressDialog::remoteName() const
+{
+    if (ui->addressSelector->count())
+        return ui->addressSelector->currentText();
+    return {};
+}
+
+quint16 AddressDialog::remotePort() const
+{
+    return quint16(ui->portSelector->text().toUInt());
+}
+
+void AddressDialog::setupHostSelector()
+{
+    QString name(QHostInfo::localHostName());
+    if (!name.isEmpty()) {
+        ui->addressSelector->addItem(name);
+        const QString domain = QHostInfo::localDomainName();
+        if (!domain.isEmpty())
+            ui->addressSelector->addItem(name + QChar('.') + domain);
+    }
+
+    if (name != QStringLiteral("localhost"))
+        ui->addressSelector->addItem(QStringLiteral("localhost"));
+
+    const QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
+    for (const QHostAddress &ipAddress : ipAddressesList) {
+        if (!ipAddress.isLoopback())
+            ui->addressSelector->addItem(ipAddress.toString());
+    }
+
+    ui->addressSelector->insertSeparator(ui->addressSelector->count());
+
+    for (const QHostAddress &ipAddress : ipAddressesList) {
+        if (ipAddress.isLoopback())
+            ui->addressSelector->addItem(ipAddress.toString());
+    }
+}
+
+void AddressDialog::setupPortSelector()
+{
+    ui->portSelector->setValidator(new QIntValidator(0, std::numeric_limits<quint16>::max(),
+                                                     ui->portSelector));
+    ui->portSelector->setText(QStringLiteral("22334"));
+}
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