SSH: Implement tunneling.

This is the "direct-tcpip" port forwarding
specified in RFC 4254.

Change-Id: I1ffa2e923b4479c7211b1b4304e66895b565fb64
Reviewed-by: hjk <qthjk@ovi.com>
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

src/libs/ssh/sshdirecttcpiptunnel.h

@@ -0,0 +1,90 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+**
+** 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.
+**
+** 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**************************************************************************/
+
+#ifndef  SSHDIRECTTCPIPTUNNEL_H
+#define  SSHDIRECTTCPIPTUNNEL_H
+
+#include "ssh_global.h"
+
+#include <QIODevice>
+#include <QSharedPointer>
+
+namespace QSsh {
+class SshConnectionInfo;
+
+namespace Internal {
+class SshChannelManager;
+class SshDirectTcpIpTunnelPrivate;
+class SshSendFacility;
+} // namespace Internal
+
+class QSSH_EXPORT SshDirectTcpIpTunnel : public QIODevice
+{
+    Q_OBJECT
+
+    friend class Internal::SshChannelManager;
+
+public:
+    typedef QSharedPointer<SshDirectTcpIpTunnel> Ptr;
+
+    ~SshDirectTcpIpTunnel();
+
+    // QIODevice stuff
+    bool atEnd() const;
+    qint64 bytesAvailable() const;
+    bool canReadLine() const;
+    void close();
+    bool isSequential() const { return true; }
+
+    void initialize();
+
+signals:
+    void initialized();
+    void error(const QString &reason);
+    void tunnelClosed();
+
+private:
+    SshDirectTcpIpTunnel(quint32 channelId, quint16 remotePort,
+            const SshConnectionInfo &connectionInfo, Internal::SshSendFacility &sendFacility);
+
+    // QIODevice stuff
+    qint64 readData(char *data, qint64 maxlen);
+    qint64 writeData(const char *data, qint64 len);
+
+    Q_SLOT void handleError(const QString &reason);
+
+    Internal::SshDirectTcpIpTunnelPrivate * const d;
+};
+
+} // namespace QSsh
+
+#endif // SSHDIRECTTCPIPTUNNEL_H