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<td >Qt 5.9</td><td ><a href="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-module.html">C++ Classes</a></td><td >QTcpServer</td></tr></table><table class="buildversion"><tr>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QTcpServer Class</h1>
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<p>The <a href="qtcpserver.html">QTcpServer</a> class provides a TCP-based server. <a href="#details">More...</a></p>
<!-- @@@QTcpServer -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QTcpServer&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += network</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="../qtcore/qobject.html">QObject</a></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherited By:</td><td class="memItemRight bottomAlign"> <p><a href="qsctpserver.html">QSctpServer</a></p>
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<li><a href="qtcpserver-members.html">List of all members, including inherited members</a></li>
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<p><b>Note:</b> All functions in this class are reentrant.</p>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#QTcpServer">QTcpServer</a></b>(QObject *<i>parent</i> = Q_NULLPTR)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#dtor.QTcpServer">~QTcpServer</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#close">close</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#errorString">errorString</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#isListening">isListening</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#listen">listen</a></b>(const QHostAddress &amp;<i>address</i> = QHostAddress::Any, quint16 <i>port</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#maxPendingConnections">maxPendingConnections</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QTcpSocket *</td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#pauseAccepting">pauseAccepting</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QNetworkProxy </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#proxy">proxy</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#resumeAccepting">resumeAccepting</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QHostAddress </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#serverAddress">serverAddress</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAbstractSocket::SocketError </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#serverError">serverError</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> quint16 </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#serverPort">serverPort</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#setMaxPendingConnections">setMaxPendingConnections</a></b>(int <i>numConnections</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#setProxy">setProxy</a></b>(const QNetworkProxy &amp;<i>networkProxy</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#setSocketDescriptor">setSocketDescriptor</a></b>(qintptr <i>socketDescriptor</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qintptr </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#socketDescriptor">socketDescriptor</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#waitForNewConnection">waitForNewConnection</a></b>(int <i>msec</i> = 0, bool *<i>timedOut</i> = Q_NULLPTR)</td></tr>
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<ul>
<li class="fn">32 public functions inherited from <a href="../qtcore/qobject.html#public-functions">QObject</a></li>
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<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#acceptError">acceptError</a></b>(QAbstractSocket::SocketError <i>socketError</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#newConnection">newConnection</a></b>()</td></tr>
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<li class="fn">2 signals inherited from <a href="../qtcore/qobject.html#signals">QObject</a></li>
</ul>
<a name="protected-functions"></a>
<h2 id="protected-functions">Protected Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#addPendingConnection">addPendingConnection</a></b>(QTcpSocket *<i>socket</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qtcpserver.html#incomingConnection">incomingConnection</a></b>(qintptr <i>socketDescriptor</i>)</td></tr>
</table></div>
<ul>
<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 property inherited from <a href="../qtcore/qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="../qtcore/qobject.html#public-slots">QObject</a></li>
<li class="fn">1 public variable inherited from <a href="../qtcore/qobject.html#public-variables">QObject</a></li>
<li class="fn">10 static public members inherited from <a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
<li class="fn">2 protected variables inherited from <a href="../qtcore/qobject.html#protected-variables">QObject</a></li>
</ul>
<a name="details"></a>
<!-- $$$QTcpServer-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qtcpserver.html">QTcpServer</a> class provides a TCP-based server.</p>
<p>This class makes it possible to accept incoming TCP connections. You can specify the port or have <a href="qtcpserver.html">QTcpServer</a> pick one automatically. You can listen on a specific address or on all the machine's addresses.</p>
<p>Call <a href="qtcpserver.html#listen">listen</a>() to have the server listen for incoming connections. The <a href="qtcpserver.html#newConnection">newConnection</a>() signal is then emitted each time a client connects to the server.</p>
<p>Call <a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>() to accept the pending connection as a connected <a href="qtcpsocket.html">QTcpSocket</a>. The function returns a pointer to a <a href="qtcpsocket.html">QTcpSocket</a> in <a href="qabstractsocket.html#SocketState-enum">QAbstractSocket::ConnectedState</a> that you can use for communicating with the client.</p>
<p>If an error occurs, <a href="qtcpserver.html#serverError">serverError</a>() returns the type of error, and <a href="qtcpserver.html#errorString">errorString</a>() can be called to get a human readable description of what happened.</p>
<p>When listening for connections, the address and port on which the server is listening are available as <a href="qtcpserver.html#serverAddress">serverAddress</a>() and <a href="qtcpserver.html#serverPort">serverPort</a>().</p>
<p>Calling <a href="qtcpserver.html#close">close</a>() makes <a href="qtcpserver.html">QTcpServer</a> stop listening for incoming connections.</p>
<p>Although <a href="qtcpserver.html">QTcpServer</a> is mostly designed for use with an event loop, it's possible to use it without one. In that case, you must use <a href="qtcpserver.html#waitForNewConnection">waitForNewConnection</a>(), which blocks until either a connection is available or a timeout expires.</p>
</div>
<p><b>See also </b><a href="qtcpsocket.html">QTcpSocket</a>, <a href="qtnetwork-fortuneserver-example.html">Fortune Server Example</a>, <a href="qtnetwork-threadedfortuneserver-example.html">Threaded Fortune Server Example</a>, <a href="qtnetwork-loopback-example.html">Loopback Example</a>, and <a href="qtnetwork-torrent-example.html">Torrent Example</a>.</p>
<!-- @@@QTcpServer -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QTcpServer[overload1]$$$QTcpServerQObject* -->
<h3 class="fn" id="QTcpServer"><a name="QTcpServer"></a>QTcpServer::<span class="name">QTcpServer</span>(<span class="type"><a href="../qtcore/qobject.html#QObject">QObject</a></span> *<i>parent</i> = Q_NULLPTR)</h3>
<p>Constructs a <a href="qtcpserver.html">QTcpServer</a> object.</p>
<p><i>parent</i> is passed to the <a href="../qtcore/qobject.html">QObject</a> constructor.</p>
<p><b>See also </b><a href="qtcpserver.html#listen">listen</a>() and <a href="qtcpserver.html#setSocketDescriptor">setSocketDescriptor</a>().</p>
<!-- @@@QTcpServer -->
<!-- $$$~QTcpServer[overload1]$$$~QTcpServer -->
<h3 class="fn" id="dtor.QTcpServer"><a name="dtor.QTcpServer"></a><code>[virtual] </code>QTcpServer::<span class="name">~QTcpServer</span>()</h3>
<p>Destroys the <a href="qtcpserver.html">QTcpServer</a> object. If the server is listening for connections, the socket is automatically closed.</p>
<p>Any client <a href="qtcpsocket.html">QTcpSocket</a>s that are still connected must either disconnect or be reparented before the server is deleted.</p>
<p><b>See also </b><a href="qtcpserver.html#close">close</a>().</p>
<!-- @@@~QTcpServer -->
<!-- $$$acceptError[overload1]$$$acceptErrorQAbstractSocket::SocketError -->
<h3 class="fn" id="acceptError"><a name="acceptError"></a><code>[signal] </code><span class="type">void</span> QTcpServer::<span class="name">acceptError</span>(<span class="type"><a href="qabstractsocket.html#SocketError-enum">QAbstractSocket::SocketError</a></span> <i>socketError</i>)</h3>
<p>This signal is emitted when accepting a new connection results in an error. The <i>socketError</i> parameter describes the type of error that occurred.</p>
<p>This function was introduced in  Qt 5.0.</p>
<p><b>See also </b><a href="qtcpserver.html#pauseAccepting">pauseAccepting</a>() and <a href="qtcpserver.html#resumeAccepting">resumeAccepting</a>().</p>
<!-- @@@acceptError -->
<!-- $$$addPendingConnection[overload1]$$$addPendingConnectionQTcpSocket* -->
<h3 class="fn" id="addPendingConnection"><a name="addPendingConnection"></a><code>[protected] </code><span class="type">void</span> QTcpServer::<span class="name">addPendingConnection</span>(<span class="type"><a href="qtcpsocket.html">QTcpSocket</a></span> *<i>socket</i>)</h3>
<p>This function is called by <a href="qtcpserver.html#incomingConnection">QTcpServer::incomingConnection</a>() to add the <i>socket</i> to the list of pending incoming connections.</p>
<p><b>Note: </b>Don't forget to call this member from reimplemented <a href="qtcpserver.html#incomingConnection">incomingConnection</a>() if you do not want to break the Pending Connections mechanism.</p><p>This function was introduced in  Qt 4.7.</p>
<p><b>See also </b><a href="qtcpserver.html#incomingConnection">incomingConnection</a>().</p>
<!-- @@@addPendingConnection -->
<!-- $$$close[overload1]$$$close -->
<h3 class="fn" id="close"><a name="close"></a><span class="type">void</span> QTcpServer::<span class="name">close</span>()</h3>
<p>Closes the server. The server will no longer listen for incoming connections.</p>
<p><b>See also </b><a href="qtcpserver.html#listen">listen</a>().</p>
<!-- @@@close -->
<!-- $$$errorString[overload1]$$$errorString -->
<h3 class="fn" id="errorString"><a name="errorString"></a><span class="type"><a href="../qtcore/qstring.html">QString</a></span> QTcpServer::<span class="name">errorString</span>() const</h3>
<p>Returns a human readable description of the last error that occurred.</p>
<p><b>See also </b><a href="qtcpserver.html#serverError">serverError</a>().</p>
<!-- @@@errorString -->
<!-- $$$hasPendingConnections[overload1]$$$hasPendingConnections -->
<h3 class="fn" id="hasPendingConnections"><a name="hasPendingConnections"></a><code>[virtual] </code><span class="type">bool</span> QTcpServer::<span class="name">hasPendingConnections</span>() const</h3>
<p>Returns <code>true</code> if the server has a pending connection; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>() and <a href="qtcpserver.html#setMaxPendingConnections">setMaxPendingConnections</a>().</p>
<!-- @@@hasPendingConnections -->
<!-- $$$incomingConnection[overload1]$$$incomingConnectionqintptr -->
<h3 class="fn" id="incomingConnection"><a name="incomingConnection"></a><code>[virtual protected] </code><span class="type">void</span> QTcpServer::<span class="name">incomingConnection</span>(<span class="type"><a href="../qtcore/qtglobal.html#qintptr-typedef">qintptr</a></span> <i>socketDescriptor</i>)</h3>
<p>This virtual function is called by <a href="qtcpserver.html">QTcpServer</a> when a new connection is available. The <i>socketDescriptor</i> argument is the native socket descriptor for the accepted connection.</p>
<p>The base implementation creates a <a href="qtcpsocket.html">QTcpSocket</a>, sets the socket descriptor and then stores the <a href="qtcpsocket.html">QTcpSocket</a> in an internal list of pending connections. Finally <a href="qtcpserver.html#newConnection">newConnection</a>() is emitted.</p>
<p>Reimplement this function to alter the server's behavior when a connection is available.</p>
<p>If this server is using <a href="qnetworkproxy.html">QNetworkProxy</a> then the <i>socketDescriptor</i> may not be usable with native socket functions, and should only be used with <a href="qabstractsocket.html#setSocketDescriptor">QTcpSocket::setSocketDescriptor</a>().</p>
<p><b>Note: </b>If another socket is created in the reimplementation of this method, it needs to be added to the Pending Connections mechanism by calling <a href="qtcpserver.html#addPendingConnection">addPendingConnection</a>().</p><p><b>Note: </b>If you want to handle an incoming connection as a new <a href="qtcpsocket.html">QTcpSocket</a> object in another thread you have to pass the <a href="qtcpserver.html#socketDescriptor">socketDescriptor</a> to the other thread and create the <a href="qtcpsocket.html">QTcpSocket</a> object there and use its <a href="qtcpserver.html#setSocketDescriptor">setSocketDescriptor</a>() method.</p><p><b>See also </b><a href="qtcpserver.html#newConnection">newConnection</a>(), <a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>(), and <a href="qtcpserver.html#addPendingConnection">addPendingConnection</a>().</p>
<!-- @@@incomingConnection -->
<!-- $$$isListening[overload1]$$$isListening -->
<h3 class="fn" id="isListening"><a name="isListening"></a><span class="type">bool</span> QTcpServer::<span class="name">isListening</span>() const</h3>
<p>Returns <code>true</code> if the server is currently listening for incoming connections; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qtcpserver.html#listen">listen</a>().</p>
<!-- @@@isListening -->
<!-- $$$listen[overload1]$$$listenconstQHostAddress&quint16 -->
<h3 class="fn" id="listen"><a name="listen"></a><span class="type">bool</span> QTcpServer::<span class="name">listen</span>(const <span class="type"><a href="qhostaddress.html">QHostAddress</a></span> &amp;<i>address</i> = QHostAddress::Any, <span class="type"><a href="../qtcore/qtglobal.html#quint16-typedef">quint16</a></span> <i>port</i> = 0)</h3>
<p>Tells the server to listen for incoming connections on address <i>address</i> and port <i>port</i>. If <i>port</i> is 0, a port is chosen automatically. If <i>address</i> is <a href="qhostaddress.html#SpecialAddress-enum">QHostAddress::Any</a>, the server will listen on all network interfaces.</p>
<p>Returns <code>true</code> on success; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qtcpserver.html#isListening">isListening</a>().</p>
<!-- @@@listen -->
<!-- $$$maxPendingConnections[overload1]$$$maxPendingConnections -->
<h3 class="fn" id="maxPendingConnections"><a name="maxPendingConnections"></a><span class="type">int</span> QTcpServer::<span class="name">maxPendingConnections</span>() const</h3>
<p>Returns the maximum number of pending accepted connections. The default is 30.</p>
<p><b>See also </b><a href="qtcpserver.html#setMaxPendingConnections">setMaxPendingConnections</a>() and <a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a>().</p>
<!-- @@@maxPendingConnections -->
<!-- $$$newConnection[overload1]$$$newConnection -->
<h3 class="fn" id="newConnection"><a name="newConnection"></a><code>[signal] </code><span class="type">void</span> QTcpServer::<span class="name">newConnection</span>()</h3>
<p>This signal is emitted every time a new connection is available.</p>
<p><b>See also </b><a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a>() and <a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>().</p>
<!-- @@@newConnection -->
<!-- $$$nextPendingConnection[overload1]$$$nextPendingConnection -->
<h3 class="fn" id="nextPendingConnection"><a name="nextPendingConnection"></a><code>[virtual] </code><span class="type"><a href="qtcpsocket.html">QTcpSocket</a></span> *QTcpServer::<span class="name">nextPendingConnection</span>()</h3>
<p>Returns the next pending connection as a connected <a href="qtcpsocket.html">QTcpSocket</a> object.</p>
<p>The socket is created as a child of the server, which means that it is automatically deleted when the <a href="qtcpserver.html">QTcpServer</a> object is destroyed. It is still a good idea to delete the object explicitly when you are done with it, to avoid wasting memory.</p>
<p>0 is returned if this function is called when there are no pending connections.</p>
<p><b>Note: </b>The returned <a href="qtcpsocket.html">QTcpSocket</a> object cannot be used from another thread. If you want to use an incoming connection from another thread, you need to override <a href="qtcpserver.html#incomingConnection">incomingConnection</a>().</p><p><b>See also </b><a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a>().</p>
<!-- @@@nextPendingConnection -->
<!-- $$$pauseAccepting[overload1]$$$pauseAccepting -->
<h3 class="fn" id="pauseAccepting"><a name="pauseAccepting"></a><span class="type">void</span> QTcpServer::<span class="name">pauseAccepting</span>()</h3>
<p>Pauses accepting new connections. Queued connections will remain in queue.</p>
<p>This function was introduced in  Qt 5.0.</p>
<p><b>See also </b><a href="qtcpserver.html#resumeAccepting">resumeAccepting</a>().</p>
<!-- @@@pauseAccepting -->
<!-- $$$proxy[overload1]$$$proxy -->
<h3 class="fn" id="proxy"><a name="proxy"></a><span class="type"><a href="qnetworkproxy.html">QNetworkProxy</a></span> QTcpServer::<span class="name">proxy</span>() const</h3>
<p>Returns the network proxy for this socket. By default <a href="qnetworkproxy.html#ProxyType-enum">QNetworkProxy::DefaultProxy</a> is used.</p>
<p>This function was introduced in  Qt 4.1.</p>
<p><b>See also </b><a href="qtcpserver.html#setProxy">setProxy</a>() and <a href="qnetworkproxy.html">QNetworkProxy</a>.</p>
<!-- @@@proxy -->
<!-- $$$resumeAccepting[overload1]$$$resumeAccepting -->
<h3 class="fn" id="resumeAccepting"><a name="resumeAccepting"></a><span class="type">void</span> QTcpServer::<span class="name">resumeAccepting</span>()</h3>
<p>Resumes accepting new connections.</p>
<p>This function was introduced in  Qt 5.0.</p>
<p><b>See also </b><a href="qtcpserver.html#pauseAccepting">pauseAccepting</a>().</p>
<!-- @@@resumeAccepting -->
<!-- $$$serverAddress[overload1]$$$serverAddress -->
<h3 class="fn" id="serverAddress"><a name="serverAddress"></a><span class="type"><a href="qhostaddress.html">QHostAddress</a></span> QTcpServer::<span class="name">serverAddress</span>() const</h3>
<p>Returns the server's address if the server is listening for connections; otherwise returns <a href="qhostaddress.html#SpecialAddress-enum">QHostAddress::Null</a>.</p>
<p><b>See also </b><a href="qtcpserver.html#serverPort">serverPort</a>() and <a href="qtcpserver.html#listen">listen</a>().</p>
<!-- @@@serverAddress -->
<!-- $$$serverError[overload1]$$$serverError -->
<h3 class="fn" id="serverError"><a name="serverError"></a><span class="type"><a href="qabstractsocket.html#SocketError-enum">QAbstractSocket::SocketError</a></span> QTcpServer::<span class="name">serverError</span>() const</h3>
<p>Returns an error code for the last error that occurred.</p>
<p><b>See also </b><a href="qtcpserver.html#errorString">errorString</a>().</p>
<!-- @@@serverError -->
<!-- $$$serverPort[overload1]$$$serverPort -->
<h3 class="fn" id="serverPort"><a name="serverPort"></a><span class="type"><a href="../qtcore/qtglobal.html#quint16-typedef">quint16</a></span> QTcpServer::<span class="name">serverPort</span>() const</h3>
<p>Returns the server's port if the server is listening for connections; otherwise returns 0.</p>
<p><b>See also </b><a href="qtcpserver.html#serverAddress">serverAddress</a>() and <a href="qtcpserver.html#listen">listen</a>().</p>
<!-- @@@serverPort -->
<!-- $$$setMaxPendingConnections[overload1]$$$setMaxPendingConnectionsint -->
<h3 class="fn" id="setMaxPendingConnections"><a name="setMaxPendingConnections"></a><span class="type">void</span> QTcpServer::<span class="name">setMaxPendingConnections</span>(<span class="type">int</span> <i>numConnections</i>)</h3>
<p>Sets the maximum number of pending accepted connections to <i>numConnections</i>. <a href="qtcpserver.html">QTcpServer</a> will accept no more than <i>numConnections</i> incoming connections before <a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>() is called. By default, the limit is 30 pending connections.</p>
<p>Clients may still able to connect after the server has reached its maximum number of pending connections (i.e&#x2e;, <a href="qtcpsocket.html">QTcpSocket</a> can still emit the connected() signal). <a href="qtcpserver.html">QTcpServer</a> will stop accepting the new connections, but the operating system may still keep them in queue.</p>
<p><b>See also </b><a href="qtcpserver.html#maxPendingConnections">maxPendingConnections</a>() and <a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a>().</p>
<!-- @@@setMaxPendingConnections -->
<!-- $$$setProxy[overload1]$$$setProxyconstQNetworkProxy& -->
<h3 class="fn" id="setProxy"><a name="setProxy"></a><span class="type">void</span> QTcpServer::<span class="name">setProxy</span>(const <span class="type"><a href="qnetworkproxy.html">QNetworkProxy</a></span> &amp;<i>networkProxy</i>)</h3>
<p>Sets the explicit network proxy for this socket to <i>networkProxy</i>.</p>
<p>To disable the use of a proxy for this socket, use the <a href="qnetworkproxy.html#ProxyType-enum">QNetworkProxy::NoProxy</a> proxy type:</p>
<pre class="cpp">

  server<span class="operator">-</span><span class="operator">&gt;</span>setProxy(<span class="type"><a href="qnetworkproxy.html">QNetworkProxy</a></span><span class="operator">::</span>NoProxy);

</pre>
<p>This function was introduced in  Qt 4.1.</p>
<p><b>See also </b><a href="qtcpserver.html#proxy">proxy</a>() and <a href="qnetworkproxy.html">QNetworkProxy</a>.</p>
<!-- @@@setProxy -->
<!-- $$$setSocketDescriptor[overload1]$$$setSocketDescriptorqintptr -->
<h3 class="fn" id="setSocketDescriptor"><a name="setSocketDescriptor"></a><span class="type">bool</span> QTcpServer::<span class="name">setSocketDescriptor</span>(<span class="type"><a href="../qtcore/qtglobal.html#qintptr-typedef">qintptr</a></span> <i>socketDescriptor</i>)</h3>
<p>Sets the socket descriptor this server should use when listening for incoming connections to <i>socketDescriptor</i>. Returns <code>true</code> if the socket is set successfully; otherwise returns <code>false</code>.</p>
<p>The socket is assumed to be in listening state.</p>
<p><b>See also </b><a href="qtcpserver.html#socketDescriptor">socketDescriptor</a>() and <a href="qtcpserver.html#isListening">isListening</a>().</p>
<!-- @@@setSocketDescriptor -->
<!-- $$$socketDescriptor[overload1]$$$socketDescriptor -->
<h3 class="fn" id="socketDescriptor"><a name="socketDescriptor"></a><span class="type"><a href="../qtcore/qtglobal.html#qintptr-typedef">qintptr</a></span> QTcpServer::<span class="name">socketDescriptor</span>() const</h3>
<p>Returns the native socket descriptor the server uses to listen for incoming instructions, or -1 if the server is not listening.</p>
<p>If the server is using <a href="qnetworkproxy.html">QNetworkProxy</a>, the returned descriptor may not be usable with native socket functions.</p>
<p><b>See also </b><a href="qtcpserver.html#setSocketDescriptor">setSocketDescriptor</a>() and <a href="qtcpserver.html#isListening">isListening</a>().</p>
<!-- @@@socketDescriptor -->
<!-- $$$waitForNewConnection[overload1]$$$waitForNewConnectionintbool* -->
<h3 class="fn" id="waitForNewConnection"><a name="waitForNewConnection"></a><span class="type">bool</span> QTcpServer::<span class="name">waitForNewConnection</span>(<span class="type">int</span> <i>msec</i> = 0, <span class="type">bool</span> *<i>timedOut</i> = Q_NULLPTR)</h3>
<p>Waits for at most <i>msec</i> milliseconds or until an incoming connection is available. Returns <code>true</code> if a connection is available; otherwise returns <code>false</code>. If the operation timed out and <i>timedOut</i> is not 0, *<i>timedOut</i> will be set to true.</p>
<p>This is a blocking function call. Its use is disadvised in a single-threaded GUI application, since the whole application will stop responding until the function returns. waitForNewConnection() is mostly useful when there is no event loop available.</p>
<p>The non-blocking alternative is to connect to the <a href="qtcpserver.html#newConnection">newConnection</a>() signal.</p>
<p>If msec is -1, this function will not time out.</p>
<p><b>See also </b><a href="qtcpserver.html#hasPendingConnections">hasPendingConnections</a>() and <a href="qtcpserver.html#nextPendingConnection">nextPendingConnection</a>().</p>
<!-- @@@waitForNewConnection -->
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