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<h1 class="title">Q3ServerSocket Class Reference</h1>
<!-- $$$Q3ServerSocket-brief -->
<p>The Q3ServerSocket class provides a TCP-based server. <a href="#details">More...</a></p>
<!-- @@@Q3ServerSocket -->
<pre class="cpp"> <span class="preprocessor">#include &lt;Q3ServerSocket&gt;</span></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html#qserversocket">Porting to Qt 4</a> for more information.</p>
<p><b>Inherits: </b><a href="qobject.html">QObject</a>.</p>
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<h2>Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#Q3ServerSocket">Q3ServerSocket</a></b> ( Q_UINT16 <i>port</i>, int <i>backlog</i> = 1, QObject * <i>parent</i> = 0, const char * <i>name</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#Q3ServerSocket-2">Q3ServerSocket</a></b> ( const QHostAddress &amp; <i>address</i>, Q_UINT16 <i>port</i>, int <i>backlog</i> = 1, QObject * <i>parent</i> = 0, const char * <i>name</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#Q3ServerSocket-3">Q3ServerSocket</a></b> ( QObject * <i>parent</i> = 0, const char * <i>name</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#dtor.Q3ServerSocket">~Q3ServerSocket</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QHostAddress </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#address">address</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#newConnection">newConnection</a></b> ( int <i>socket</i> ) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#ok">ok</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Q_UINT16 </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#port">port</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#setSocket">setSocket</a></b> ( int <i>socket</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#socket">socket</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> Q3SocketDevice * </td><td class="memItemRight bottomAlign"><b><a href="q3serversocket.html#socketDevice">socketDevice</a></b> ()</td></tr>
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<!-- $$$Q3ServerSocket-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The Q3ServerSocket class provides a TCP-based server.</p>
<p>This class is a convenience class for accepting incoming TCP connections. You can specify the port or have Q3ServerSocket pick one, and listen on just one address or on all the machine's addresses.</p>
<p>Using the API is very simple: subclass Q3ServerSocket, call the constructor of your choice, and implement <a href="q3serversocket.html#newConnection">newConnection</a>() to handle new incoming connections. There is nothing more to do.</p>
<p>(Note that due to lack of support in the underlying APIs, Q3ServerSocket cannot accept or reject connections conditionally.)</p>
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<p><b>See also </b><a href="q3socket.html">Q3Socket</a>, <a href="q3socketdevice.html">Q3SocketDevice</a>, <a href="qhostaddress.html">QHostAddress</a>, and <a href="qsocketnotifier.html">QSocketNotifier</a>.</p>
<!-- @@@Q3ServerSocket -->
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<h2>Member Function Documentation</h2>
<!-- $$$Q3ServerSocket[overload1]$$$Q3ServerSocketQ_UINT16intQObject*constchar* -->
<h3 class="fn"><a name="Q3ServerSocket"></a>Q3ServerSocket::<span class="name">Q3ServerSocket</span> ( <span class="type"><a href="qtglobal-qt3.html#Q_UINT16-typedef">Q_UINT16</a></span> <i>port</i>, <span class="type">int</span> <i>backlog</i> = 1, <span class="type"><a href="qobject.html">QObject</a></span> * <i>parent</i> = 0, const <span class="type">char</span> * <i>name</i> = 0 )</h3>
<p>Creates a server socket object, that will serve the given <i>port</i> on all the addresses of this host. If <i>port</i> is 0, <a href="q3serversocket.html" class="compat">Q3ServerSocket</a> will pick a suitable port in a system-dependent manner. Use <i>backlog</i> to specify how many pending connections the server can have.</p>
<p>The <i>parent</i> and <i>name</i> arguments are passed on to the <a href="qobject.html">QObject</a> constructor.</p>
<p><b>Warning:</b> On Tru64 Unix systems a value of 0 for <i>backlog</i> means that you don't accept any connections at all; you should specify a value larger than 0.</p>
<!-- @@@Q3ServerSocket -->
<!-- $$$Q3ServerSocket$$$Q3ServerSocketconstQHostAddress&Q_UINT16intQObject*constchar* -->
<h3 class="fn"><a name="Q3ServerSocket-2"></a>Q3ServerSocket::<span class="name">Q3ServerSocket</span> ( const <span class="type"><a href="qhostaddress.html">QHostAddress</a></span> &amp; <i>address</i>, <span class="type"><a href="qtglobal-qt3.html#Q_UINT16-typedef">Q_UINT16</a></span> <i>port</i>, <span class="type">int</span> <i>backlog</i> = 1, <span class="type"><a href="qobject.html">QObject</a></span> * <i>parent</i> = 0, const <span class="type">char</span> * <i>name</i> = 0 )</h3>
<p>Creates a server socket object, that will serve the given <i>port</i> only on the given <i>address</i>. Use <i>backlog</i> to specify how many pending connections the server can have.</p>
<p>The <i>parent</i> and <i>name</i> arguments are passed on to the <a href="qobject.html">QObject</a> constructor.</p>
<p><b>Warning:</b> On Tru64 Unix systems a value of 0 for <i>backlog</i> means that you don't accept any connections at all; you should specify a value larger than 0.</p>
<!-- @@@Q3ServerSocket -->
<!-- $$$Q3ServerSocket$$$Q3ServerSocketQObject*constchar* -->
<h3 class="fn"><a name="Q3ServerSocket-3"></a>Q3ServerSocket::<span class="name">Q3ServerSocket</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>parent</i> = 0, const <span class="type">char</span> * <i>name</i> = 0 )</h3>
<p>Construct an empty server socket.</p>
<p>This constructor, in combination with <a href="q3serversocket.html#setSocket">setSocket</a>(), allows us to use the <a href="q3serversocket.html" class="compat">Q3ServerSocket</a> class as a wrapper for other socket types (e.g&#x2e; Unix Domain Sockets under Unix).</p>
<p>The <i>parent</i> and <i>name</i> arguments are passed on to the <a href="qobject.html">QObject</a> constructor.</p>
<p><b>See also </b><a href="q3serversocket.html#setSocket">setSocket</a>().</p>
<!-- @@@Q3ServerSocket -->
<!-- $$$~Q3ServerSocket[overload1]$$$~Q3ServerSocket -->
<h3 class="fn"><a name="dtor.Q3ServerSocket"></a>Q3ServerSocket::<span class="name">~Q3ServerSocket</span> ()<tt> [virtual]</tt></h3>
<p>Destroys the socket.</p>
<p>This causes any backlogged connections (connections that have reached the host, but not yet been completely set up by calling <a href="q3socketdevice.html#accept">Q3SocketDevice::accept</a>()) to be severed.</p>
<p>Existing connections continue to exist; this only affects the acceptance of new connections.</p>
<!-- @@@~Q3ServerSocket -->
<!-- $$$address[overload1]$$$address -->
<h3 class="fn"><a name="address"></a><span class="type"><a href="qhostaddress.html">QHostAddress</a></span> Q3ServerSocket::<span class="name">address</span> () const</h3>
<p>Returns the address on which this object listens, or 0.0&#x2e;0&#x2e;0 if this object listens on more than one address. <a href="q3serversocket.html#ok">ok</a>() must be true before calling this function.</p>
<p><b>See also </b><a href="q3serversocket.html#port">port</a>() and <a href="q3socketdevice.html#address">Q3SocketDevice::address</a>().</p>
<!-- @@@address -->
<!-- $$$newConnection[overload1]$$$newConnectionint -->
<h3 class="fn"><a name="newConnection"></a><span class="type">void</span> Q3ServerSocket::<span class="name">newConnection</span> ( <span class="type">int</span> <i>socket</i> )<tt> [pure virtual]</tt></h3>
<p>This pure virtual function is responsible for setting up a new incoming connection. <i>socket</i> is the fd (file descriptor) for the newly accepted connection.</p>
<!-- @@@newConnection -->
<!-- $$$ok[overload1]$$$ok -->
<h3 class="fn"><a name="ok"></a><span class="type">bool</span> Q3ServerSocket::<span class="name">ok</span> () const</h3>
<p>Returns true if the construction succeeded; otherwise returns false.</p>
<!-- @@@ok -->
<!-- $$$port[overload1]$$$port -->
<h3 class="fn"><a name="port"></a><span class="type"><a href="qtglobal-qt3.html#Q_UINT16-typedef">Q_UINT16</a></span> Q3ServerSocket::<span class="name">port</span> () const</h3>
<p>Returns the port number on which this server socket listens. This is always non-zero; if you specify 0 in the constructor, <a href="q3serversocket.html" class="compat">Q3ServerSocket</a> will pick a non-zero port itself. <a href="q3serversocket.html#ok">ok</a>() must be true before calling this function.</p>
<p><b>See also </b><a href="q3serversocket.html#address">address</a>() and <a href="q3socketdevice.html#port">Q3SocketDevice::port</a>().</p>
<!-- @@@port -->
<!-- $$$setSocket[overload1]$$$setSocketint -->
<h3 class="fn"><a name="setSocket"></a><span class="type">void</span> Q3ServerSocket::<span class="name">setSocket</span> ( <span class="type">int</span> <i>socket</i> )<tt> [virtual]</tt></h3>
<p>Sets the socket to use <i>socket</i>. bind() and listen() should already have been called for <i>socket</i>.</p>
<p>This allows us to use the <a href="q3serversocket.html" class="compat">Q3ServerSocket</a> class as a wrapper for other socket types (e.g&#x2e; Unix Domain Sockets).</p>
<p><b>See also </b><a href="q3serversocket.html#socket">socket</a>().</p>
<!-- @@@setSocket -->
<!-- $$$socket[overload1]$$$socket -->
<h3 class="fn"><a name="socket"></a><span class="type">int</span> Q3ServerSocket::<span class="name">socket</span> () const</h3>
<p>Returns the operating system socket.</p>
<p><b>See also </b><a href="q3serversocket.html#setSocket">setSocket</a>().</p>
<!-- @@@socket -->
<!-- $$$socketDevice[overload1]$$$socketDevice -->
<h3 class="fn"><a name="socketDevice"></a><span class="type"><a href="q3socketdevice.html">Q3SocketDevice</a></span> * Q3ServerSocket::<span class="name">socketDevice</span> ()<tt> [protected]</tt></h3>
<p>Returns a pointer to the internal socket device. The returned pointer is 0 if there is no connection or pending connection.</p>
<p>There is normally no need to manipulate the socket device directly since this class does all the necessary setup for most client or server socket applications.</p>
<!-- @@@socketDevice -->
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