Long live Qt 4.5!

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diff --git a/src/qt3support/network/q3serversocket.cpp b/src/qt3support/network/q3serversocket.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt3Support module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "q3serversocket.h"
+
+#ifndef QT_NO_NETWORK
+
+#include "qsocketnotifier.h"
+
+QT_BEGIN_NAMESPACE
+
+class Q3ServerSocketPrivate {
+public:
+    Q3ServerSocketPrivate(): s(0), n(0) {}
+    ~Q3ServerSocketPrivate() { delete n; delete s; }
+    Q3SocketDevice *s;
+    QSocketNotifier *n;
+};
+
+
+/*!
+    \class Q3ServerSocket
+    \brief The Q3ServerSocket class provides a TCP-based server.
+
+    \compat
+
+    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.
+
+    Using the API is very simple: subclass Q3ServerSocket, call the
+    constructor of your choice, and implement newConnection() to
+    handle new incoming connections. There is nothing more to do.
+
+    (Note that due to lack of support in the underlying APIs,
+    Q3ServerSocket cannot accept or reject connections conditionally.)
+
+    \sa Q3Socket, Q3SocketDevice, QHostAddress, QSocketNotifier
+*/
+
+
+/*!
+    Creates a server socket object, that will serve the given \a port
+    on all the addresses of this host. If \a port is 0, Q3ServerSocket
+    will pick a suitable port in a system-dependent manner. Use \a
+    backlog to specify how many pending connections the server can
+    have.
+
+    The \a parent and \a name arguments are passed on to the QObject
+    constructor.
+
+    \warning On Tru64 Unix systems a value of 0 for \a backlog means
+    that you don't accept any connections at all; you should specify a
+    value larger than 0.
+*/
+
+Q3ServerSocket::Q3ServerSocket( Q_UINT16 port, int backlog,
+			      QObject *parent, const char *name )
+    : QObject( parent, name )
+{
+    d = new Q3ServerSocketPrivate;
+    init( QHostAddress(), port, backlog );
+}
+
+
+/*!
+    Creates a server socket object, that will serve the given \a port
+    only on the given \a address. Use \a backlog to specify how many
+    pending connections the server can have.
+
+    The \a parent and \a name arguments are passed on to the QObject
+    constructor.
+
+    \warning On Tru64 Unix systems a value of 0 for \a backlog means
+    that you don't accept any connections at all; you should specify a
+    value larger than 0.
+*/
+
+Q3ServerSocket::Q3ServerSocket( const QHostAddress & address, Q_UINT16 port,
+			      int backlog,
+			      QObject *parent, const char *name )
+    : QObject( parent, name )
+{
+    d = new Q3ServerSocketPrivate;
+    init( address, port, backlog );
+}
+
+
+/*!
+    Construct an empty server socket.
+
+    This constructor, in combination with setSocket(), allows us to
+    use the Q3ServerSocket class as a wrapper for other socket types
+    (e.g. Unix Domain Sockets under Unix).
+
+    The \a parent and \a name arguments are passed on to the QObject
+    constructor.
+
+    \sa setSocket()
+*/
+
+Q3ServerSocket::Q3ServerSocket( QObject *parent, const char *name )
+    : QObject( parent, name )
+{
+    d = new Q3ServerSocketPrivate;
+}
+
+
+/*!
+    Returns true if the construction succeeded; otherwise returns false.
+*/
+bool Q3ServerSocket::ok() const
+{
+    return !!d->s;
+}
+
+/*
+  The common bit of the constructors.
+ */
+void Q3ServerSocket::init( const QHostAddress & address, Q_UINT16 port, int backlog )
+{
+    d->s = new Q3SocketDevice( Q3SocketDevice::Stream, address.isIPv4Address()
+			      ? Q3SocketDevice::IPv4 : Q3SocketDevice::IPv6, 0 );
+#if !defined(Q_OS_WIN32)
+    // Under Unix, we want to be able to use the port, even if a socket on the
+    // same address-port is in TIME_WAIT. Under Windows this is possible anyway
+    // -- furthermore, the meaning of reusable is different: it means that you
+    // can use the same address-port for multiple listening sockets.
+    d->s->setAddressReusable( true );
+#endif
+    if ( d->s->bind( address, port )
+      && d->s->listen( backlog ) )
+    {
+	d->n = new QSocketNotifier( d->s->socket(), QSocketNotifier::Read,
+				    this, "accepting new connections" );
+	connect( d->n, SIGNAL(activated(int)),
+		 this, SLOT(incomingConnection(int)) );
+    } else {
+	qWarning( "Q3ServerSocket: failed to bind or listen to the socket" );
+	delete d->s;
+	d->s = 0;
+    }
+}
+
+
+/*!
+    Destroys the socket.
+
+    This causes any backlogged connections (connections that have
+    reached the host, but not yet been completely set up by calling
+    Q3SocketDevice::accept()) to be severed.
+
+    Existing connections continue to exist; this only affects the
+    acceptance of new connections.
+*/
+Q3ServerSocket::~Q3ServerSocket()
+{
+    delete d;
+}
+
+
+/*!
+    \fn void Q3ServerSocket::newConnection( int socket )
+
+    This pure virtual function is responsible for setting up a new
+    incoming connection. \a socket is the fd (file descriptor) for the
+    newly accepted connection.
+*/
+
+
+void Q3ServerSocket::incomingConnection( int )
+{
+    int fd = d->s->accept();
+    if ( fd >= 0 )
+	newConnection( fd );
+}
+
+
+/*!
+    Returns the port number on which this server socket listens. This
+    is always non-zero; if you specify 0 in the constructor,
+    Q3ServerSocket will pick a non-zero port itself. ok() must be true
+    before calling this function.
+
+    \sa address() Q3SocketDevice::port()
+*/
+Q_UINT16 Q3ServerSocket::port() const
+{
+    if ( !d || !d->s )
+	return 0;
+    return d->s->port();
+}
+
+
+/*!
+    Returns the operating system socket.
+*/
+int Q3ServerSocket::socket() const
+{
+    if ( !d || !d->s )
+	return -1;
+
+    return d->s->socket();
+}
+
+/*!
+    Returns the address on which this object listens, or 0.0.0.0 if
+    this object listens on more than one address. ok() must be true
+    before calling this function.
+
+    \sa port() Q3SocketDevice::address()
+*/
+QHostAddress Q3ServerSocket::address() const
+{
+    if ( !d || !d->s )
+	return QHostAddress();
+
+    return d->s->address();
+}
+
+
+/*!
+    Returns a pointer to the internal socket device. The returned
+    pointer is 0 if there is no connection or pending connection.
+
+    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.
+*/
+Q3SocketDevice *Q3ServerSocket::socketDevice()
+{
+    if ( !d )
+	return 0;
+
+    return d->s;
+}
+
+
+/*!
+    Sets the socket to use \a socket. bind() and listen() should
+    already have been called for \a socket.
+
+    This allows us to use the Q3ServerSocket class as a wrapper for
+    other socket types (e.g. Unix Domain Sockets).
+*/
+void Q3ServerSocket::setSocket( int socket )
+{
+    delete d;
+    d = new Q3ServerSocketPrivate;
+    d->s = new Q3SocketDevice( socket, Q3SocketDevice::Stream );
+    d->n = new QSocketNotifier( d->s->socket(), QSocketNotifier::Read,
+	       this, "accepting new connections" );
+    connect( d->n, SIGNAL(activated(int)),
+	     this, SLOT(incomingConnection(int)) );
+}
+
+QT_END_NAMESPACE
+
+#endif //QT_NO_NETWORK