source: trunk/src/network/kernel/qhostinfo_os2.cpp@ 603

/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** Copyright (C) 2009 netlabs.org. OS/2 parts.
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 1.1, 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 have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

//#define QHOSTINFO_DEBUG

static const int RESOLVER_TIMEOUT = 2000;

#include "qt_os2.h"
#include "qplatformdefs.h"

#include "qhostinfo_p.h"
#include "qiodevice.h"
#include <qbytearray.h>
#include <qlibrary.h>
#include <qurl.h>
#include <qfile.h>

extern "C" {
#include <sys/types.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <resolv.h>
}

#include <qmutex.h>
QT_BEGIN_NAMESPACE
Q_GLOBAL_STATIC(QMutex, getHostByNameMutex)
QT_END_NAMESPACE

QT_BEGIN_NAMESPACE

QHostInfo QHostInfoAgent::fromName(const QString &hostName)
{
    QHostInfo results;
    results.setHostName(hostName);

#if defined(QHOSTINFO_DEBUG)
    qDebug("QHostInfoAgent::fromName(%s) looking up...",
           hostName.toLatin1().constData());
#endif

    QHostAddress address;
    if (address.setAddress(hostName)) {
        // Reverse lookup
        in_addr_t inetaddr = inet_addr(hostName.toLatin1().constData());
        struct hostent *ent = gethostbyaddr((const char *)&inetaddr, sizeof(inetaddr), AF_INET);
        if (!ent) {
            results.setError(QHostInfo::HostNotFound);
            results.setErrorString(tr("Host not found"));
            return results;
        }
        results.setHostName(QString::fromLatin1(ent->h_name));
    }

    // Fall back to gethostbyname for platforms that don't define
    // getaddrinfo. gethostbyname does not support IPv6, and it's not
    // reentrant on all platforms. For now this is okay since we only
    // use one QHostInfoAgent, but if more agents are introduced, locking
    // must be provided.
    QMutexLocker locker(::getHostByNameMutex());
    hostent *result = gethostbyname(hostName.toLatin1().constData());
    if (result) {