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50
51#include <QtCore>
52#include <QtNetwork>
53
54#include "addressdialog.h"
55#include "association.h"
56#include "mainwindow.h"
57#include "ui_mainwindow.h"
58
59#include <utility>
60
61MainWindow::MainWindow(QWidget *parent)
62 : QMainWindow(parent),
63 ui(new Ui::MainWindow),
64 nameTemplate(QStringLiteral("Alice (clone number %1)"))
65{
66 ui->setupUi(this);
67 updateUi();
68}
69
70MainWindow::~MainWindow()
71{
72 delete ui;
73}
74
75//! [0]
76
77const QString colorizer(QStringLiteral("<font color=\"%1\">%2</font><br>"));
78
79void MainWindow::addErrorMessage(const QString &message)
80{
81 ui->clientMessages->insertHtml(text: colorizer.arg(QStringLiteral("Crimson"), args: message));
82}
83
84void MainWindow::addWarningMessage(const QString &message)
85{
86 ui->clientMessages->insertHtml(text: colorizer.arg(QStringLiteral("DarkOrange"), args: message));
87}
88
89void MainWindow::addInfoMessage(const QString &message)
90{
91 ui->clientMessages->insertHtml(text: colorizer.arg(QStringLiteral("DarkBlue"), args: message));
92}
93
94void MainWindow::addServerResponse(const QString &clientInfo, const QByteArray &datagram,
95 const QByteArray &plainText)
96{
97 static const QString messageColor = QStringLiteral("DarkMagenta");
98 static const QString formatter = QStringLiteral("<br>---------------"
99 "<br>%1 received a DTLS datagram:<br> %2"
100 "<br>As plain text:<br> %3");
101
102 const QString html = formatter.arg(args: clientInfo, args: QString::fromUtf8(str: datagram.toHex(separator: ' ')),
103 args: QString::fromUtf8(str: plainText));
104 ui->serverMessages->insertHtml(text: colorizer.arg(a1: messageColor, a2: html));
105}
106
107//! [0]
108
109void MainWindow::on_connectButton_clicked()
110{
111 if (lookupId != -1) {
112 QHostInfo::abortHostLookup(lookupId);
113 lookupId = -1;
114 port = 0;
115 updateUi();
116 return;
117 }
118
119 AddressDialog dialog;
120 if (dialog.exec() != QDialog::Accepted)
121 return;
122
123 const QString hostName = dialog.remoteName();
124 if (hostName.isEmpty())
125 return addWarningMessage(message: tr(s: "Host name or address required to connect"));
126
127 port = dialog.remotePort();
128 QHostAddress remoteAddress;
129 if (remoteAddress.setAddress(hostName))
130 return startNewConnection(address: remoteAddress);
131
132 addInfoMessage(message: tr(s: "Looking up the host ..."));
133 lookupId = QHostInfo::lookupHost(name: hostName, receiver: this, SLOT(lookupFinished(QHostInfo)));
134 updateUi();
135}
136
137void MainWindow::updateUi()
138{
139 ui->connectButton->setText(lookupId == -1 ? tr(s: "Connect ...") : tr(s: "Cancel lookup"));
140 ui->shutdownButton->setEnabled(connections.size() != 0);
141}
142
143void MainWindow::lookupFinished(const QHostInfo &hostInfo)
144{
145 if (hostInfo.lookupId() != lookupId)
146 return;
147
148 lookupId = -1;
149 updateUi();
150
151 if (hostInfo.error() != QHostInfo::NoError) {
152 addErrorMessage(message: hostInfo.errorString());
153 return;
154 }
155
156 const QList<QHostAddress> foundAddresses = hostInfo.addresses();
157 if (foundAddresses.empty()) {
158 addWarningMessage(message: tr(s: "Host not found"));
159 return;
160 }
161
162 const auto remoteAddress = foundAddresses.at(i: 0);
163 addInfoMessage(message: tr(s: "Connecting to: %1").arg(a: remoteAddress.toString()));
164 startNewConnection(address: remoteAddress);
165}
166
167void MainWindow::startNewConnection(const QHostAddress &address)
168{
169 AssocPtr newConnection(new DtlsAssociation(address, port, nameTemplate.arg(a: nextId)));
170 connect(sender: newConnection.data(), signal: &DtlsAssociation::errorMessage, receiver: this, slot: &MainWindow::addErrorMessage);
171 connect(sender: newConnection.data(), signal: &DtlsAssociation::warningMessage, receiver: this, slot: &MainWindow::addWarningMessage);
172 connect(sender: newConnection.data(), signal: &DtlsAssociation::infoMessage, receiver: this, slot: &MainWindow::addInfoMessage);
173 connect(sender: newConnection.data(), signal: &DtlsAssociation::serverResponse, receiver: this, slot: &MainWindow::addServerResponse);
174 connections.push_back(t: std::move(newConnection));
175 connections.back()->startHandshake();
176 updateUi();
177
178 ++nextId;
179}
180
181void MainWindow::on_shutdownButton_clicked()
182{
183 connections.clear();
184 updateUi();
185}
186

source code of qtbase/examples/network/secureudpclient/mainwindow.cpp