Adding plugin qmltooling/qmlostplugin for QML debugging over OST (USB) on Symbian.

Task-number: QTBUG-18764
Reviewed-by: kkoehne

6 files changed, 691 insertions, 0 deletions

diff --git a/src/plugins/qmltooling/qmldbg_ost/qmldbg_ost.pro b/src/plugins/qmltooling/qmldbg_ost/qmldbg_ost.pro
new file mode 100644
index 0000000..2748889
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/qmldbg_ost.pro
@@ -0,0 +1,21 @@
+TARGET = qmldbg_ost
+QT       += declarative network
+
+include(../../qpluginbase.pri)
+
+QTDIR_build:DESTDIR  = $$QT_BUILD_TREE/plugins/qmltooling
+QTDIR_build:REQUIRES += "contains(QT_CONFIG, declarative)"
+
+SOURCES += \
+    qmlostplugin.cpp \
+	qostdevice.cpp
+
+HEADERS += \
+    qmlostplugin.h \
+    qostdevice.h \
+    usbostcomm.h
+
+target.path += $$[QT_INSTALL_PLUGINS]/qmltooling
+INSTALLS += target
+
+symbian:TARGET.UID3=0x20031E92
diff --git a/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.cpp b/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.cpp
new file mode 100644
index 0000000..e0d7664
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.cpp
@@ -0,0 +1,143 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qmlostplugin.h"
+#include "qostdevice.h"
+
+#include <private/qdeclarativedebugserver_p.h>
+#include <private/qpacketprotocol_p.h>
+
+QT_BEGIN_NAMESPACE
+
+static const TInt KQmlOstProtocolId = 0x94;
+
+class QmlOstPluginPrivate {
+public:
+    QmlOstPluginPrivate();
+
+    QOstDevice *ost;
+    QPacketProtocol *protocol;
+    QDeclarativeDebugServer *debugServer;
+};
+
+QmlOstPluginPrivate::QmlOstPluginPrivate() :
+    ost(0),
+    protocol(0),
+    debugServer(0)
+{
+}
+
+QmlOstPlugin::QmlOstPlugin() :
+    d_ptr(new QmlOstPluginPrivate)
+{
+}
+
+QmlOstPlugin::~QmlOstPlugin()
+{
+    delete d_ptr;
+}
+
+void QmlOstPlugin::setServer(QDeclarativeDebugServer *server)
+{
+    Q_D(QmlOstPlugin);
+    d->debugServer = server;
+}
+
+bool QmlOstPlugin::isConnected() const
+{
+    Q_D(const QmlOstPlugin);
+    return d->ost && d->ost->isOpen();
+}
+
+void QmlOstPlugin::send(const QByteArray &message)
+{
+    Q_D(QmlOstPlugin);
+
+    if (!isConnected())
+        return;
+
+    QPacket pack;
+    pack.writeRawData(message.data(), message.length());
+
+    d->protocol->send(pack);
+    //d->socket->flush();
+}
+
+void QmlOstPlugin::disconnect()
+{
+    Q_D(QmlOstPlugin);
+
+    delete d->protocol;
+    d->protocol = 0;
+}
+
+void QmlOstPlugin::setPort(int port, bool block)
+{
+    Q_UNUSED(port);
+    Q_UNUSED(block);
+
+    Q_D(QmlOstPlugin);
+
+    d->ost = new QOstDevice(this);
+    bool ok = d->ost->open(KQmlOstProtocolId);
+    if (!ok) {
+        if (d->ost->errorString().length())
+            qDebug("Error from QOstDevice: %s", qPrintable(d->ost->errorString()));
+        qWarning("QDeclarativeDebugServer: Unable to listen on OST"); // This message is part of the signalling - do not change the format!
+        return;
+    }
+    d->protocol = new QPacketProtocol(d->ost, this);
+    QObject::connect(d->protocol, SIGNAL(readyRead()), this, SLOT(readyRead()));
+    qWarning("QDeclarativeDebugServer: Waiting for connection via OST"); // This message is part of the signalling - do not change the format!
+}
+
+void QmlOstPlugin::readyRead()
+{
+    Q_D(QmlOstPlugin);
+    QPacket packet = d->protocol->read();
+
+    QByteArray content = packet.data();
+    d->debugServer->receiveMessage(content);
+}
+
+Q_EXPORT_PLUGIN2(qmlostplugin, QmlOstPlugin)
+
+QT_END_NAMESPACE
diff --git a/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.h b/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.h
new file mode 100644
index 0000000..1e18444
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/qmlostplugin.h
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMLOSTPLUGIN_H
+#define QMLOSTPLUGIN_H
+
+#include <QtGui/QStylePlugin>
+#include <QtDeclarative/private/qdeclarativedebugserverconnection_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeDebugServer;
+class QmlOstPluginPrivate;
+
+class QmlOstPlugin : public QObject, public QDeclarativeDebugServerConnection
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QmlOstPlugin)
+    Q_DISABLE_COPY(QmlOstPlugin)
+    Q_INTERFACES(QDeclarativeDebugServerConnection)
+
+
+public:
+    QmlOstPlugin();
+    ~QmlOstPlugin();
+
+    void setServer(QDeclarativeDebugServer *server);
+    void setPort(int port, bool bock);
+
+    bool isConnected() const;
+    void send(const QByteArray &message);
+    void disconnect();
+
+private Q_SLOTS:
+    void readyRead();
+
+private:
+    QmlOstPluginPrivate *d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QMLOSTPLUGIN_H
diff --git a/src/plugins/qmltooling/qmldbg_ost/qostdevice.cpp b/src/plugins/qmltooling/qmldbg_ost/qostdevice.cpp
new file mode 100644
index 0000000..3c5515f
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/qostdevice.cpp
@@ -0,0 +1,180 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qostdevice.h"
+#include <e32base.h>
+
+#include "usbostcomm.h"
+
+class QOstDevicePrivate : public CActive
+{
+    QOstDevice* q_ptr;
+    Q_DECLARE_PUBLIC(QOstDevice)
+
+public:
+    QOstDevicePrivate() : CActive(CActive::EPriorityStandard) {
+        CActiveScheduler::Add(this);
+    }
+    ~QOstDevicePrivate() {
+        Cancel();
+    }
+
+private:
+    void RunL();
+    void DoCancel();
+
+private:
+    RUsbOstComm ost;
+    TBuf8<4096> readBuf;
+    QByteArray dataBuf;
+};
+
+QOstDevice::QOstDevice(QObject *parent) :
+    QIODevice(parent), d_ptr(new QOstDevicePrivate)
+{
+    d_ptr->q_ptr = this;
+}
+
+QOstDevice::~QOstDevice()
+{
+    close();
+    delete d_ptr;
+}
+
+bool QOstDevice::open(int ostProtocolId)
+{
+    if (isOpen())
+        return false;
+
+    Q_D(QOstDevice);
+    TInt err = d->ost.Connect();
+    if (!err) err = d->ost.Open();
+    const TVersion KRequiredVersion(1,1,0);
+    TVersion version = d->ost.Version();
+    if (version.iMajor < KRequiredVersion.iMajor ||
+            (version.iMajor == KRequiredVersion.iMajor && version.iMinor < KRequiredVersion.iMinor)) {
+        setErrorString("CODA version too old. At least version 4.0.18 (without TRK) is required.");
+        return false;
+    }
+
+    if (!err) err = d->ost.RegisterProtocolID((TOstProtIds)ostProtocolId, EFalse);
+    if (!err) {
+        d->ost.ReadMessage(d->iStatus, d->readBuf);
+        d->SetActive();
+        return QIODevice::open(ReadWrite | Unbuffered);
+    }
+    return false;
+}
+
+void QOstDevicePrivate::RunL()
+{
+    Q_Q(QOstDevice);
+    //qDebug("QOstDevice received %d bytes q=%x", readBuf.Size(), q);
+    if (iStatus == KErrNone) {
+        QByteArray data = QByteArray::fromRawData((const char*)readBuf.Ptr(), readBuf.Size());
+        dataBuf.append(data);
+
+        readBuf.Zero();
+        ost.ReadMessage(iStatus, readBuf);
+        SetActive();
+
+        emit q->readyRead();
+    } else {
+        q->setErrorString(QString("Error %1 from RUsbOstComm::ReadMessage()").arg(iStatus.Int()));
+    }
+    //qDebug("-QOstDevicePrivate RunL");
+}
+
+void QOstDevicePrivate::DoCancel()
+{
+    ost.ReadCancel();
+}
+
+void QOstDevice::close()
+{
+    Q_D(QOstDevice);
+    QIODevice::close();
+    d->Cancel();
+    // RDbgTrcComm::Close isn't safe to call when not open, sigh
+    if (d->ost.Handle()) {
+        d->ost.Close();
+    }
+}
+
+qint64 QOstDevice::readData(char *data, qint64 maxSize)
+{
+    Q_D(QOstDevice);
+    if (d->dataBuf.length() == 0 && !d->IsActive())
+        return -1;
+    qint64 available = qMin(maxSize, (qint64)d->dataBuf.length());
+    memcpy(data, d->dataBuf.constData(), available);
+    d->dataBuf.remove(0, available);
+    return available;
+}
+
+static const TInt KMaxOstPacketLen = 4096;
+
+qint64 QOstDevice::writeData(const char *data, qint64 maxSize)
+{
+    Q_D(QOstDevice);
+    TPtrC8 ptr((const TUint8*)data, (TInt)maxSize);
+    while (ptr.Length()) {
+        TPtrC8 fragment = ptr.Left(qMin(ptr.Length(), KMaxOstPacketLen));
+        //qDebug("QOstDevice writing %d bytes", fragment.Length());
+        TRequestStatus stat;
+        d->ost.WriteMessage(stat, fragment);
+        User::WaitForRequest(stat);
+        if (stat.Int() != KErrNone) {
+            setErrorString(QString("Error %1 from RUsbOstComm::WriteMessage()").arg(stat.Int()));
+            return -1;
+        }
+        ptr.Set(ptr.Mid(fragment.Length()));
+    }
+    emit bytesWritten(maxSize); //TODO does it matter this is emitted synchronously?
+    //qDebug("QOstDevice wrote %d bytes", ptr.Size());
+    return maxSize;
+}
+
+qint64 QOstDevice::bytesAvailable() const
+{
+    Q_D(const QOstDevice);
+    return d->dataBuf.length();
+}
diff --git a/src/plugins/qmltooling/qmldbg_ost/qostdevice.h b/src/plugins/qmltooling/qmldbg_ost/qostdevice.h
new file mode 100644
index 0000000..26bdc15
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/qostdevice.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOSTDEVICE_H
+#define QOSTDEVICE_H
+
+#include <QIODevice.h>
+
+QT_BEGIN_NAMESPACE
+
+class QOstDevicePrivate;
+
+class QOstDevice : public QIODevice
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QOstDevice)
+    Q_DISABLE_COPY(QOstDevice)
+
+public:
+    explicit QOstDevice(QObject *parent=0);
+    ~QOstDevice();
+
+    bool open(int ostProtocolId);
+    void close();
+
+protected:
+    qint64 readData(char *data, qint64 maxSize);
+    qint64 writeData(const char *data, qint64 maxSize);
+    qint64 bytesAvailable() const;
+
+private:
+    QOstDevicePrivate* d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QOSTDEVICE_H
diff --git a/src/plugins/qmltooling/qmldbg_ost/usbostcomm.h b/src/plugins/qmltooling/qmldbg_ost/usbostcomm.h
new file mode 100644
index 0000000..5f29e71
--- /dev/null
+++ b/src/plugins/qmltooling/qmldbg_ost/usbostcomm.h
@@ -0,0 +1,191 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef USBHOSTCOMM_H
+#define USBHOSTCOMM_H
+
+// Based on the official usbostrouter header, modified to remove dependancy on
+// the client DLL
+
+#include <e32base.h>
+
+typedef int TOstProtIds;
+
+class RUsbOstComm : public RSessionBase
+{
+public:
+    RUsbOstComm();
+    TInt Connect();
+    TInt Disconnect();
+    TInt Open();
+    TInt Close();
+    TInt RegisterProtocolID(TOstProtIds aId, TBool aNeedHeader);
+    void ReadMessage(TRequestStatus& aStatus, TDes8& aDes);
+    TInt ReadCancel();
+    void WriteMessage(TRequestStatus& aStatus, const TDesC8& aDes, TBool aHasHeader=EFalse);
+    TVersion Version() const;
+
+private:
+    enum TUsbOstCmdCode
+    {
+        EUsbOstCmdCodeFirst,
+        EUsbOstCmdConnect,
+        EUsbOstCmdDisconnect,
+        EUsbOstCmdCodeGetAcmConfig,
+        EUsbOstCmdCodeSetAcmConfig,
+        EUsbOstCmdCodeOpen,
+        EUsbOstCmdCodeClose,
+        EUsbOstCmdCodeRegisterId,
+        EUsbOstCmdCodeRegisterIds,
+        EUsbOstCmdCodeUnRegisterId,
+        EUsbOstCmdCodeUnRegisterIds,
+        EUsbOstCmdCodeReadMsg,
+        EUsbOstCmdCodeReadCancel,
+        EUsbOstCmdCodeWriteMsg,
+        EUsbOstCmdCodeWriteCancel,
+        EUsbOstCmdCodeLast
+    };
+};
+
+RUsbOstComm::RUsbOstComm()
+{
+}
+
+TInt RUsbOstComm::Connect()
+{
+    _LIT(KUsbOstServerName, "!UsbOstRouter");
+    _LIT(KUsbOstServerImageName, "usbostrouter");
+    const TUid KUsbOstServerUid = { 0x200170BE };
+    TInt startupAttempts = 2;
+    for(;;) {
+        TInt ret = CreateSession(KUsbOstServerName, TVersion(1,0,0));
+        if (ret != KErrNotFound && ret != KErrServerTerminated) {
+            return ret;
+        }
+
+        if (startupAttempts-- == 0) {
+            return ret;
+        }
+
+        RProcess server;
+        ret = server.Create(KUsbOstServerImageName, KNullDesC, KUsbOstServerUid);
+        if (ret != KErrNone)
+            return ret;
+
+        TRequestStatus serverDiedRequestStatus;
+        server.Rendezvous(serverDiedRequestStatus);
+
+        if (serverDiedRequestStatus != KRequestPending) {
+            // Abort startup
+            server.Kill(KErrNone);
+        } else {
+            // Logon OK - start the server
+            server.Resume();
+        }
+        User::WaitForRequest(serverDiedRequestStatus);
+        ret = (server.ExitType() == EExitPanic) ? KErrGeneral : serverDiedRequestStatus.Int();
+        server.Close();
+
+        if (ret != KErrNone && ret != KErrAlreadyExists) {
+            return ret;
+        }
+    }
+}
+
+TInt RUsbOstComm::Disconnect()
+{
+    return SendReceive(EUsbOstCmdDisconnect);
+}
+
+TInt RUsbOstComm::Open()
+{
+    return SendReceive(EUsbOstCmdCodeOpen);
+}
+
+TInt RUsbOstComm::Close()
+{
+    TInt err = SendReceive(EUsbOstCmdCodeClose);
+    RHandleBase::Close();
+    return err;
+}
+
+TInt RUsbOstComm::RegisterProtocolID(const TOstProtIds aId, TBool aNeedHeader)
+{
+    TIpcArgs args(aId, aNeedHeader);
+    return SendReceive(EUsbOstCmdCodeRegisterId, args);
+}
+
+void RUsbOstComm::ReadMessage(TRequestStatus& aStatus, TDes8& aDes)
+{
+    TIpcArgs args(aDes.MaxLength(), &aDes);
+    SendReceive(EUsbOstCmdCodeReadMsg, args, aStatus);
+}
+
+TInt RUsbOstComm::ReadCancel()
+{
+    return SendReceive(EUsbOstCmdCodeReadCancel);
+}
+
+void RUsbOstComm::WriteMessage(TRequestStatus& aStatus, const TDesC8& aDes, TBool aHasHeader)
+{
+    TIpcArgs args(aHasHeader, aDes.Length(), &aDes);
+    SendReceive(EUsbOstCmdCodeWriteMsg, args, aStatus);
+}
+
+typedef TVersion (*TVersionFunction)(const RUsbOstComm*);
+const TInt KVersionOrdinal = 17;
+
+TVersion RUsbOstComm::Version() const
+{
+    // This function has to go to the DLL, unfortunately
+    TVersion result; // Return 0.0.0 on any error
+    RLibrary lib;
+    TInt err = lib.Load(_L("usbostcomm"));
+    if (err) return result;
+
+    TLibraryFunction fn = lib.Lookup(KVersionOrdinal);
+    if (fn)
+        result = ((TVersionFunction)fn)(this);
+    lib.Close();
+    return result;
+}
+
+#endif //USBHOSTCOMM_H