Add support for DNS lookups using native APIs

The QDnsLookup class provides asynchronous APIs for performing
DNS lookups. For now, the following lookups are supported:
- A and AAAA
- CNAME as defined per RFC 1035
- MX as defined per RFC 1035
- NS as defined per RFC 1035
- PTR as defined per RFC 1035
- SRV as defined per RFC 2782
- TXT as defined per RFC 1035

Task-number: QTBUG-10481
Change-Id: I46c1741ec23615863eeca3a1231d5e3f8942495e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 213 insertions, 0 deletions

diff --git a/src/network/kernel/qdnslookup_p.h b/src/network/kernel/qdnslookup_p.h
new file mode 100644
index 0000000000..8515620a93
--- /dev/null
+++ b/src/network/kernel/qdnslookup_p.h
@@ -0,0 +1,213 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Jeremy Lainé <jeremy.laine@m4x.org>
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDNSLOOKUP_P_H
+#define QDNSLOOKUP_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the QDnsLookup class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qmutex.h"
+#include "QtCore/qrunnable.h"
+#include "QtCore/qsharedpointer.h"
+#include "QtCore/qthreadpool.h"
+#include "QtNetwork/qdnslookup.h"
+#include "QtNetwork/qhostaddress.h"
+#include "private/qobject_p.h"
+
+QT_BEGIN_NAMESPACE
+
+//#define QDNSLOOKUP_DEBUG
+
+class QDnsLookupRunnable;
+
+class QDnsLookupReply
+{
+public:
+    QDnsLookupReply()
+        : error(QDnsLookup::NoError)
+    { }
+
+    QDnsLookup::Error error;
+    QString errorString;
+
+    QList<QDnsDomainNameRecord> canonicalNameRecords;
+    QList<QDnsHostAddressRecord> hostAddressRecords;
+    QList<QDnsMailExchangeRecord> mailExchangeRecords;
+    QList<QDnsDomainNameRecord> nameServerRecords;
+    QList<QDnsDomainNameRecord> pointerRecords;
+    QList<QDnsServiceRecord> serviceRecords;
+    QList<QDnsTextRecord> textRecords;
+};
+
+class QDnsLookupPrivate : public QObjectPrivate
+{
+public:
+    QDnsLookupPrivate()
+        : isFinished(false)
+        , type(QDnsLookup::A)
+        , runnable(0)
+    { }
+
+    void _q_lookupFinished(const QDnsLookupReply &reply);
+
+    bool isFinished;
+    QString name;
+    QDnsLookup::Type type;
+    QDnsLookupReply reply;
+    QDnsLookupRunnable *runnable;
+
+    Q_DECLARE_PUBLIC(QDnsLookup)
+};
+
+class QDnsLookupRunnable : public QObject, public QRunnable
+{
+    Q_OBJECT
+
+public:
+    QDnsLookupRunnable(QDnsLookup::Type type, const QByteArray &name)
+        : requestType(type)
+        , requestName(name)
+    { }
+    void run();
+
+signals:
+    void finished(const QDnsLookupReply &reply);
+
+private:
+    static void query(const int requestType, const QByteArray &requestName, QDnsLookupReply *reply);
+    QDnsLookup::Type requestType;
+    QByteArray requestName;
+};
+
+class QDnsLookupThreadPool : public QThreadPool
+{
+    Q_OBJECT
+
+public:
+    QDnsLookupThreadPool();
+    void start(QRunnable *runnable);
+
+private slots:
+    void _q_applicationDestroyed();
+
+private:
+    QMutex signalsMutex;
+    bool signalsConnected;
+};
+
+class QDnsRecordPrivate : public QSharedData
+{
+public:
+    QDnsRecordPrivate()
+        : timeToLive(0)
+    { }
+
+    QString name;
+    quint32 timeToLive;
+};
+
+class QDnsDomainNameRecordPrivate : public QDnsRecordPrivate
+{
+public:
+    QDnsDomainNameRecordPrivate()
+    { }
+
+    QString value;
+};
+
+class QDnsHostAddressRecordPrivate : public QDnsRecordPrivate
+{
+public:
+    QDnsHostAddressRecordPrivate()
+    { }
+
+    QHostAddress value;
+};
+
+class QDnsMailExchangeRecordPrivate : public QDnsRecordPrivate
+{
+public:
+    QDnsMailExchangeRecordPrivate()
+        : preference(0)
+    { }
+
+    QString exchange;
+    quint16 preference;
+};
+
+class QDnsServiceRecordPrivate : public QDnsRecordPrivate
+{
+public:
+    QDnsServiceRecordPrivate()
+        : port(0),
+          priority(0),
+          weight(0)
+    { }
+
+    QString target;
+    quint16 port;
+    quint16 priority;
+    quint16 weight;
+};
+
+class QDnsTextRecordPrivate : public QDnsRecordPrivate
+{
+public:
+    QDnsTextRecordPrivate()
+    { }
+
+    QList<QByteArray> values;
+};
+
+QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(QDnsLookupReply)
+
+#endif // QDNSLOOKUP_P_H