<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>sender.cpp Example File | Qt Network 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-multicastsender-example.html">Multicast Sender Example</a></td><td >sender.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">sender.cpp Example File</h1> <span class="subtitle">multicastsender/sender.cpp</span> <!-- $$$multicastsender/sender.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "sender.h"</span> Sender<span class="operator">::</span>Sender(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QDialog</span>(parent)<span class="operator">,</span> groupAddress4(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"239.255.43.21"</span>))<span class="operator">,</span> groupAddress6(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"ff12::2115"</span>)) { <span class="comment">// force binding to their respective families</span> udpSocket4<span class="operator">.</span>bind(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span>(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>AnyIPv4)<span class="operator">,</span> <span class="number">0</span>); udpSocket6<span class="operator">.</span>bind(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span>(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>AnyIPv6)<span class="operator">,</span> udpSocket4<span class="operator">.</span>localPort()); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> msg <span class="operator">=</span> tr(<span class="string">"Ready to multicast datagrams to groups %1 and [%2] on port 45454"</span>)<span class="operator">.</span>arg(groupAddress4<span class="operator">.</span>toString()); <span class="keyword">if</span> (udpSocket6<span class="operator">.</span>state() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>BoundState) msg <span class="operator">=</span> tr(<span class="string">"IPv6 failed. Ready to multicast datagrams to group %1 on port 45454"</span>)<span class="operator">.</span>arg(groupAddress4<span class="operator">.</span>toString()); <span class="keyword">else</span> msg <span class="operator">=</span> msg<span class="operator">.</span>arg(groupAddress6<span class="operator">.</span>toString()); statusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(msg); <span class="keyword">auto</span> ttlLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QLabel</span>(tr(<span class="string">"TTL for IPv4 multicast datagrams:"</span>)); <span class="keyword">auto</span> ttlSpinBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QSpinBox</span>; ttlSpinBox<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">255</span>); <span class="keyword">auto</span> ttlLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QHBoxLayout</span>; ttlLayout<span class="operator">-</span><span class="operator">></span>addWidget(ttlLabel); ttlLayout<span class="operator">-</span><span class="operator">></span>addWidget(ttlSpinBox); startButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"&Start"</span>)); <span class="keyword">auto</span> quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QPushButton</span>(tr(<span class="string">"&Quit"</span>)); <span class="keyword">auto</span> buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QDialogButtonBox</span>; buttonBox<span class="operator">-</span><span class="operator">></span>addButton(startButton<span class="operator">,</span> <span class="type">QDialogButtonBox</span><span class="operator">::</span>ActionRole); buttonBox<span class="operator">-</span><span class="operator">></span>addButton(quitButton<span class="operator">,</span> <span class="type">QDialogButtonBox</span><span class="operator">::</span>RejectRole); connect(ttlSpinBox<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type">int</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type">QSpinBox</span><span class="operator">::</span>valueChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Sender<span class="operator">::</span>ttlChanged); connect(startButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Sender<span class="operator">::</span>startSending); connect(quitButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Sender<span class="operator">::</span>close); connect(<span class="operator">&</span>timer<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span><span class="operator">::</span>timeout<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>Sender<span class="operator">::</span>sendDatagram); <span class="keyword">auto</span> mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(statusLabel); mainLayout<span class="operator">-</span><span class="operator">></span>addLayout(ttlLayout); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox); setLayout(mainLayout); setWindowTitle(tr(<span class="string">"Multicast Sender"</span>)); ttlSpinBox<span class="operator">-</span><span class="operator">></span>setValue(<span class="number">1</span>); } <span class="type">void</span> Sender<span class="operator">::</span>ttlChanged(<span class="type">int</span> newTtl) { <span class="comment">// we only set the TTL on the IPv4 socket, as that changes the multicast scope</span> udpSocket4<span class="operator">.</span>setSocketOption(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>MulticastTtlOption<span class="operator">,</span> newTtl); } <span class="type">void</span> Sender<span class="operator">::</span>startSending() { startButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); timer<span class="operator">.</span>start(<span class="number">1000</span>); } <span class="type">void</span> Sender<span class="operator">::</span>sendDatagram() { statusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Now sending datagram %1"</span>)<span class="operator">.</span>arg(messageNo)); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> datagram <span class="operator">=</span> <span class="string">"Multicast message "</span> <span class="operator">+</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(messageNo); udpSocket4<span class="operator">.</span>writeDatagram(datagram<span class="operator">,</span> groupAddress4<span class="operator">,</span> <span class="number">45454</span>); <span class="keyword">if</span> (udpSocket6<span class="operator">.</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>BoundState) udpSocket6<span class="operator">.</span>writeDatagram(datagram<span class="operator">,</span> groupAddress6<span class="operator">,</span> <span class="number">45454</span>); <span class="operator">+</span><span class="operator">+</span>messageNo; } </pre> </div> <!-- @@@multicastsender/sender.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>