Merge branch 'dev' into feature/ovpn3-desktop-cli

client/managementserver.cpp

@@ -1,112 +0,0 @@
-#include <QDebug>
-#include <QTcpServer>
-#include <QTcpSocket>
-
-#include "managementserver.h"
-
-ManagementServer::ManagementServer(QObject *parent) : QObject(parent),
-    m_tcpServer(nullptr)
-{
-
-}
-
-ManagementServer::~ManagementServer()
-{
-
-}
-
-bool ManagementServer::isOpen() const
-{
-    return (m_socket && m_socket->isOpen());
-}
-
-void ManagementServer::stop()
-{
-    if (m_tcpServer) m_tcpServer->close();
-}
-
-void ManagementServer::onAcceptError(QAbstractSocket::SocketError socketError)
-{
-    qDebug().noquote() << QString("Accept error: %1").arg(socketError);
-}
-
-qint64 ManagementServer::writeCommand(const QString& message)
-{
-    if (!isOpen()) {
-        return 0;
-    }
-
-    const QString command = message + "\n";
-    qint64 bytesWritten = m_socket->write(command.toStdString().c_str());
-    m_socket->flush();
-    return bytesWritten;
-}
-
-void ManagementServer::onNewConnection()
-{
-    qDebug() << "New incoming connection";
-
-    m_socket = QPointer<QTcpSocket>(m_tcpServer->nextPendingConnection());
-    if (m_tcpServer) m_tcpServer->close();
-
-    QObject::connect(m_socket.data(), &QTcpSocket::disconnected, this, &ManagementServer::onSocketDisconnected);
-    QObject::connect(m_socket.data(), &QTcpSocket::errorOccurred, this, &ManagementServer::onSocketError);
-    QObject::connect(m_socket.data(), &QTcpSocket::readyRead, this, &ManagementServer::onReadyRead);
-}
-
-void ManagementServer::onSocketError(QAbstractSocket::SocketError socketError)
-{
-    Q_UNUSED(socketError)
-    qDebug().noquote() << QString("Management server error: %1").arg(m_socket->errorString());
-}
-
-void ManagementServer::onSocketDisconnected()
-{
-    if (m_socket) m_socket->deleteLater();
-}
-
-QPointer<QTcpSocket> ManagementServer::socket() const
-{
-    if (!isOpen()) {
-        return nullptr;
-    }
-    return m_socket;
-}
-
-void ManagementServer::onReadyRead()
-{
-    emit readyRead();
-}
-
-bool ManagementServer::start(const QString& host, unsigned int port)
-{
-    if (m_tcpServer) m_tcpServer->close();
-
-    m_tcpServer =  QSharedPointer<QTcpServer>(new QTcpServer(this), [](QTcpServer *s){
-        if (s) s->deleteLater();
-    });
-    m_tcpServer->setMaxPendingConnections(1);
-
-    connect(m_tcpServer.data(), SIGNAL(acceptError(QAbstractSocket::SocketError)), this, SLOT(onAcceptError(QAbstractSocket::SocketError)));
-    connect(m_tcpServer.data(), SIGNAL(newConnection()), this, SLOT(onNewConnection()));
-
-    if (m_tcpServer->listen(QHostAddress(host), port)) {
-        emit serverStarted();
-        return true;
-    }
-
-    qDebug().noquote() << QString("Can't start TCP server, %1,%2")
-                      .arg(m_tcpServer->serverError())
-                      .arg(m_tcpServer->errorString());
-    return false;
-}
-
-QString ManagementServer::readLine()
-{
-    if (!isOpen()) {
-        qDebug() << "Socket is not opened";
-        return QString();
-    }
-
-    return m_socket->readLine();
-}

client/managementserver.h

@@ -1,45 +0,0 @@
-#ifndef MANAGEMENTSERVER_H
-#define MANAGEMENTSERVER_H
-
-#include <QAbstractSocket>
-#include <QPointer>
-#include <QSharedPointer>
-#include <QString>
-
-class QTcpServer;
-class QTcpSocket;
-
-class ManagementServer : public QObject
-{
-    Q_OBJECT
-
-public:
-    explicit ManagementServer(QObject *parent = nullptr);
-    ~ManagementServer();
-
-    bool start(const QString& host, unsigned int port);
-    void stop();
-    bool isOpen() const;
-
-    QString readLine();
-    qint64 writeCommand(const QString& message);
-
-    QPointer<QTcpSocket> socket() const;
-
-signals:
-    void readyRead();
-    void serverStarted();
-
-protected slots:
-    void onAcceptError(QAbstractSocket::SocketError socketError);
-    void onNewConnection();
-    void onReadyRead();
-    void onSocketDisconnected();
-    void onSocketError(QAbstractSocket::SocketError socketError);
-
-protected:
-    QSharedPointer<QTcpServer> m_tcpServer;
-    QPointer<QTcpSocket> m_socket;
-};
-
-#endif // MANAGEMENTSERVER_H

client/protocols/openvpnovercloakprotocol.cpp

@@ -22,6 +22,8 @@ OpenVpnOverCloakProtocol::~OpenVpnOverCloakProtocol()
 
 ErrorCode OpenVpnOverCloakProtocol::start()
 {
+
+#if 0
     if (!QFileInfo::exists(cloakExecPath())) {
         setLastError(ErrorCode::CloakExecutableMissing);
         return lastError();
@@ -77,10 +79,12 @@ ErrorCode OpenVpnOverCloakProtocol::start()
 
     if (m_ckProcess.state() == QProcess::ProcessState::Running) {
         setConnectionState(Vpn::ConnectionState::Connecting);
-
+#endif
         return OpenVpnProtocol::start();
+#if 0
     }
     else return ErrorCode::CloakExecutableMissing;
+#endif
 }
 
 void OpenVpnOverCloakProtocol::stop()
@@ -90,16 +94,6 @@ void OpenVpnOverCloakProtocol::stop()
 
     qDebug() << "OpenVpnOverCloakProtocol::stop()";
 
-#ifdef Q_OS_WIN
-    Utils::signalCtrl(m_ckProcess.processId(), CTRL_C_EVENT);
-#endif
-
-    m_ckProcess.terminate();
-
-    if (Utils::processIsRunning(Utils::executable("ck-client", false))) {
-        QThread::msleep(1000);
-        Utils::killProcessByName(Utils::executable("ck-client", false));
-    }
 }
 
 QString OpenVpnOverCloakProtocol::cloakExecPath()

client/protocols/openvpnprotocol.cpp

@@ -10,11 +10,10 @@
 #include "utilities.h"
 #include "version.h"
 
+
 OpenVpnProtocol::OpenVpnProtocol(const QJsonObject &configuration, QObject *parent) : VpnProtocol(configuration, parent)
 {
     readOpenVpnConfiguration(configuration);
-    connect(&m_managementServer, &ManagementServer::readyRead, this,
-            &OpenVpnProtocol::onReadyReadDataFromManagementServer);
 }
 
 OpenVpnProtocol::~OpenVpnProtocol()
@@ -25,7 +24,6 @@ OpenVpnProtocol::~OpenVpnProtocol()
 
 QString OpenVpnProtocol::defaultConfigFileName()
 {
-    // qDebug() << "OpenVpnProtocol::defaultConfigFileName" << defaultConfigPath() + QString("/%1.ovpn").arg(APPLICATION_NAME);
     return defaultConfigPath() + QString("/%1.ovpn").arg(APPLICATION_NAME);
 }
 
@@ -33,25 +31,20 @@ QString OpenVpnProtocol::defaultConfigPath()
 {
     QString p = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation) + "/config";
     Utils::initializePath(p);
-
     return p;
 }
 
 void OpenVpnProtocol::stop()
 {
     qDebug() << "OpenVpnProtocol::stop()";
-    setConnectionState(Vpn::ConnectionState::Disconnecting);
 
     // TODO: need refactoring
     // sendTermSignal() will even return true while server connected ???
     if ((m_connectionState == Vpn::ConnectionState::Preparing) || (m_connectionState == Vpn::ConnectionState::Connecting)
         || (m_connectionState == Vpn::ConnectionState::Connected)
         || (m_connectionState == Vpn::ConnectionState::Reconnecting)) {
-        if (!sendTermSignal()) {
             killOpenVpnProcess();
-        }
+            QThread::msleep(10);
-        QThread::msleep(10);
-        m_managementServer.stop();
     }
     setConnectionState(Vpn::ConnectionState::Disconnected);
 }
@@ -86,9 +79,30 @@ void OpenVpnProtocol::readOpenVpnConfiguration(const QJsonObject &configuration)
 {
     if (configuration.contains(ProtocolProps::key_proto_config_data(Proto::OpenVpn))) {
         QJsonObject jConfig = configuration.value(ProtocolProps::key_proto_config_data(Proto::OpenVpn)).toObject();
-
+        QString plainConfig = jConfig.value(config_key::config).toString().toUtf8();
+        if (configuration.contains(ProtocolProps::key_proto_config_data(Proto::Cloak))) {
+            QJsonObject cloakConfig = configuration.value(ProtocolProps::key_proto_config_data(Proto::Cloak)).toObject();
+            cloakConfig["NumConn"] = 1;
+            cloakConfig["ProxyMethod"] = "openvpn";
+            if (cloakConfig.contains("port")) {
+                int portValue = cloakConfig.value("port").toInt();
+                cloakConfig.remove("port");
+                cloakConfig["RemotePort"] = portValue;
+            }
+            if (cloakConfig.contains("remote")) {
+                QString hostValue = cloakConfig.value("remote").toString();
+                cloakConfig.remove("remote");
+                cloakConfig["RemoteHost"] = hostValue;
+            }
+            plainConfig += "\n<cloak>\n";
+            QJsonDocument Doc(cloakConfig);
+            QByteArray ba = Doc.toJson();
+            QString plainCloak = ba;
+            plainConfig += QString::fromLatin1(plainCloak.toUtf8().toBase64().data());
+            plainConfig += "\n</cloak>\n";
+        }
         m_configFile.open();
-        m_configFile.write(jConfig.value(config_key::config).toString().toUtf8());
+        m_configFile.write(plainConfig.toUtf8());
         m_configFile.close();
         m_configFileName = m_configFile.fileName();
 
@@ -98,60 +112,69 @@ void OpenVpnProtocol::readOpenVpnConfiguration(const QJsonObject &configuration)
 
 bool OpenVpnProtocol::openVpnProcessIsRunning() const
 {
-    return Utils::processIsRunning("openvpn");
+    return Utils::processIsRunning("ovpncli");
 }
 
-void OpenVpnProtocol::disconnectFromManagementServer()
-{
-    m_managementServer.stop();
-}
 
 QString OpenVpnProtocol::configPath() const
 {
     return m_configFileName;
 }
 
-void OpenVpnProtocol::sendManagementCommand(const QString &command)
-{
-    QIODevice *device = dynamic_cast<QIODevice *>(m_managementServer.socket().data());
-    if (device) {
-        QTextStream stream(device);
-        stream << command << Qt::endl;
-    }
-}
-
-uint OpenVpnProtocol::selectMgmtPort()
-{
-
-    for (int i = 0; i < 100; ++i) {
-        quint32 port = QRandomGenerator::global()->generate();
-        port = (double)(65000 - 15001) * port / UINT32_MAX + 15001;
-
-        QTcpServer s;
-        bool ok = s.listen(QHostAddress::LocalHost, port);
-        if (ok)
-            return port;
-    }
-
-    return m_managementPort;
-}
-
 void OpenVpnProtocol::updateRouteGateway(QString line)
 {
-    // TODO: fix for macos
+    const QString substr = "sitnl_route_best_gw result: via ";
-    line = line.split("ROUTE_GATEWAY", Qt::SkipEmptyParts).at(1);
+    int start = line.indexOf(substr) + substr.size();
-    if (!line.contains("/"))
+    int end = line.indexOf(" dev ", start);
-        return;
+
-    m_routeGateway = line.split("/", Qt::SkipEmptyParts).first();
+    m_routeGateway =  line.mid(start, (end-start));
-    m_routeGateway.replace(" ", "");
-    qDebug() << "Set VPN route gateway" << m_routeGateway;
 }
 
+void OpenVpnProtocol::handle_cli_message(QString message)
+{
+    QString line = message;
+
+    if (line.isEmpty()) {
+        return;
+    }
+
+    if (line.contains("EVENT: CONNECTED")) {
+        setConnectionState(Vpn::ConnectionState::Connected);
+    } else if (line.contains("EXITING")) {
+        // openVpnStateSigTermHandler();
+        setConnectionState(Vpn::ConnectionState::Disconnecting);
+    } else if (line.contains("RECONNECTING")) {
+        setConnectionState(Vpn::ConnectionState::Reconnecting);
+    }
+
+    if (line.contains("sitnl_route_best_gw")) {
+        updateRouteGateway(line);
+    }
+
+    if (line.contains("[ifconfig]")) {
+        updateVpnGateway(line);
+    }
+
+    // TODO: SET CORRECT STRING
+    if (line.contains("FATAL")) {
+        if (line.contains("tap-windows6 adapters on this system are currently in use or disabled")) {
+            emit protocolError(ErrorCode::OpenVpnAdaptersInUseError);
+        } else {
+            emit protocolError(ErrorCode::OpenVpnUnknownError);
+        }
+        return;
+    }
+
+}
+
+
 ErrorCode OpenVpnProtocol::start()
 {
     // qDebug() << "Start OpenVPN connection";
     OpenVpnProtocol::stop();
 
+    qDebug() << " Utils::openVpnExecPath();" << Utils::openVpnExecPath();
+
     if (!QFileInfo::exists(Utils::openVpnExecPath())) {
         setLastError(ErrorCode::OpenVpnExecutableMissing);
         return lastError();
@@ -184,23 +207,11 @@ ErrorCode OpenVpnProtocol::start()
     }
 #endif
 
-    //    QString vpnLogFileNamePath = Utils::systemLogPath() + "/openvpn.log";
-    //    Utils::createEmptyFile(vpnLogFileNamePath);
-
-    uint mgmtPort = selectMgmtPort();
-    qDebug() << "OpenVpnProtocol::start mgmt port selected:" << mgmtPort;
-
-    if (!m_managementServer.start(m_managementHost, mgmtPort)) {
-        setLastError(ErrorCode::OpenVpnManagementServerError);
-        return lastError();
-    }
-
     setConnectionState(Vpn::ConnectionState::Connecting);
-
     m_openVpnProcess = IpcClient::CreatePrivilegedProcess();
 
     if (!m_openVpnProcess) {
-        // qWarning() << "IpcProcess replica is not created!";
+        qWarning() << "IpcProcess replica is not created!";
         setLastError(ErrorCode::AmneziaServiceConnectionFailed);
         return ErrorCode::AmneziaServiceConnectionFailed;
     }
@@ -212,122 +223,100 @@ ErrorCode OpenVpnProtocol::start()
         return ErrorCode::AmneziaServiceConnectionFailed;
     }
     m_openVpnProcess->setProgram(PermittedProcess::OpenVPN);
-    QStringList arguments({
+    QStringList arguments({ configPath()/*, "--management", m_managementHost, QString::number(mgmtPort),
-            "--config", configPath(), "--management", m_managementHost, QString::number(mgmtPort),
+            "--management-client" *//*, "--log", vpnLogFileNamePath */
-            "--management-client" /*, "--log", vpnLogFileNamePath */
     });
     m_openVpnProcess->setArguments(arguments);
 
     qDebug() << arguments.join(" ");
     connect(m_openVpnProcess.data(), &PrivilegedProcess::errorOccurred,
-            [&](QProcess::ProcessError error) { qDebug() << "PrivilegedProcess errorOccurred" << error; });
+            [&](QProcess::ProcessError error) {
+                qDebug() << "PrivilegedProcess errorOccurred" << error;
+                setConnectionState(Vpn::ConnectionState::Disconnected);
+    });
 
-    connect(m_openVpnProcess.data(), &PrivilegedProcess::stateChanged,
+    connect(m_openVpnProcess.data(), &PrivilegedProcess::stateChanged, [&](QProcess::ProcessState newState) {
-            [&](QProcess::ProcessState newState) { qDebug() << "PrivilegedProcess stateChanged" << newState; });
+        switch ( newState )
+        {
+            case QProcess::Starting:
+                setConnectionState(Vpn::ConnectionState::Connecting);
+            break;
+            case QProcess::Running:
+                setConnectionState(Vpn::ConnectionState::Connecting);
+            break;
+            default:
+                setConnectionState(Vpn::ConnectionState::Disconnected);
+        }
+        qDebug() << "PrivilegedProcess stateChanged" << newState;
+    });
 
     connect(m_openVpnProcess.data(), &PrivilegedProcess::finished, this,
             [&]() { setConnectionState(Vpn::ConnectionState::Disconnected); });
 
-    m_openVpnProcess->start();
 
-    // startTimeoutTimer();
+    connect(m_openVpnProcess.data(), &PrivilegedProcess::readyRead, this, [&] {
+
+        QRemoteObjectPendingReply<QByteArray> call = m_openVpnProcess->readAll();
+        auto *watcher = new QRemoteObjectPendingCallWatcher(call, this);
+
+        auto *timeoutTimer = new QTimer(this);
+        timeoutTimer->setSingleShot(true);
+        m_watchers.insert(watcher, timeoutTimer);
+
+        connect(timeoutTimer, &QTimer::timeout, this, [this, watcher, timeoutTimer]() {
+            qDebug() << "Foo request timed out.";
+
+            m_watchers.remove(watcher);
+            watcher->deleteLater();
+            timeoutTimer->deleteLater();
+        });
+
+        connect(watcher, &QRemoteObjectPendingCallWatcher::finished, [this](QRemoteObjectPendingCallWatcher *self) {
+            QTimer *timer = m_watchers.take(self);
+            if (timer) {
+                timer->stop();
+                timer->deleteLater();
+            }
+
+            QByteArray result = self->returnValue().toByteArray();
+            handle_cli_message(QString(result));
+            self->deleteLater();
+        });
+
+        timeoutTimer->start(30000);
+
+    });
+
+    connect(m_openVpnProcess.data(), QOverload<int, QProcess::ExitStatus>::of(&PrivilegedProcess::finished), this, [this](int exitCode, QProcess::ExitStatus exitStatus) {
+        qDebug().noquote() << "OpenVPN finished, exitCode, exiStatus" << exitCode << exitStatus;
+        setConnectionState(Vpn::ConnectionState::Disconnected);
+        if (exitStatus != QProcess::NormalExit) {
+            emit protocolError(amnezia::ErrorCode::ShadowSocksExecutableCrashed);
+            stop();
+        }
+        if (exitCode !=0 ) {
+            emit protocolError(amnezia::ErrorCode::InternalError);
+            stop();
+        }
+    });
+
+    m_openVpnProcess->start();
 
     return ErrorCode::NoError;
 }
 
-bool OpenVpnProtocol::sendTermSignal()
-{
-    return m_managementServer.writeCommand("signal SIGTERM");
-}
-
-void OpenVpnProtocol::sendByteCount()
-{
-    m_managementServer.writeCommand("bytecount 1");
-}
-
-void OpenVpnProtocol::sendInitialData()
-{
-    m_managementServer.writeCommand("state on");
-    m_managementServer.writeCommand("log on");
-}
-
-void OpenVpnProtocol::onReadyReadDataFromManagementServer()
-{
-    for (;;) {
-        QString line = m_managementServer.readLine().simplified();
-
-        if (line.isEmpty()) {
-            return;
-        }
-
-        if (!line.contains(">BYTECOUNT")) {
-            qDebug().noquote() << line;
-        }
-
-        if (line.contains(">INFO:OpenVPN Management Interface")) {
-            sendInitialData();
-        } else if (line.startsWith(">STATE")) {
-            if (line.contains("CONNECTED,SUCCESS")) {
-                sendByteCount();
-                stopTimeoutTimer();
-                setConnectionState(Vpn::ConnectionState::Connected);
-                continue;
-            } else if (line.contains("EXITING,SIGTER")) {
-                // openVpnStateSigTermHandler();
-                setConnectionState(Vpn::ConnectionState::Disconnecting);
-                continue;
-            } else if (line.contains("RECONNECTING")) {
-                setConnectionState(Vpn::ConnectionState::Reconnecting);
-                continue;
-            }
-        }
-
-        if (line.contains("ROUTE_GATEWAY")) {
-            updateRouteGateway(line);
-        }
-
-        if (line.contains("PUSH: Received control message")) {
-            updateVpnGateway(line);
-        }
-
-        if (line.contains("FATAL")) {
-            if (line.contains("tap-windows6 adapters on this system are currently in use or disabled")) {
-                emit protocolError(ErrorCode::OpenVpnAdaptersInUseError);
-            } else {
-                emit protocolError(ErrorCode::OpenVpnUnknownError);
-            }
-            return;
-        }
-
-        QByteArray data(line.toStdString().c_str());
-        if (data.contains(">BYTECOUNT:")) {
-            int beg = data.lastIndexOf(">BYTECOUNT:");
-            int end = data.indexOf("\n", beg);
-
-            beg += sizeof(">BYTECOUNT:") - 1;
-            QList<QByteArray> count = data.mid(beg, end - beg + 1).split(',');
-
-            quint64 r = static_cast<quint64>(count.at(0).trimmed().toULongLong());
-            quint64 s = static_cast<quint64>(count.at(1).trimmed().toULongLong());
-
-            setBytesChanged(r, s);
-        }
-    }
-}
-
 void OpenVpnProtocol::updateVpnGateway(const QString &line)
 {
-    // line looks like
+    // "[ifconfig] [10.8.0.14] [10.8.0.13]"
-    // PUSH: Received control message: 'PUSH_REPLY,route 10.8.0.1,topology net30,ping 10,ping-restart
+    QStringList params = line.split("\n");
-    // 120,ifconfig 10.8.0.6 10.8.0.5,peer-id 0,cipher AES-256-GCM'
+    for (const QString &param : params) {
-
+        if (param.contains("ifconfig")) {
-    QStringList params = line.split(",");
+            QString l = param.right(param.size() - param.indexOf("ifconfig"));
-    for (const QString &l : params) {
-        if (l.contains("ifconfig")) {
             if (l.split(" ").size() == 3) {
                 m_vpnLocalAddress = l.split(" ").at(1);
+                m_vpnLocalAddress.remove("[");m_vpnLocalAddress.remove("]");
                 m_vpnGateway = l.split(" ").at(2);
-
+                m_vpnGateway.remove("[");m_vpnGateway.remove("]");
                 qDebug() << QString("Set vpn local address %1, gw %2").arg(m_vpnLocalAddress).arg(vpnGateway());
             }
         }

client/protocols/openvpnprotocol.h

@@ -5,7 +5,6 @@
 #include <QString>
 #include <QTimer>
 
-#include "managementserver.h"
 #include "vpnprotocol.h"
 
 #include "core/ipcclient.h"
@@ -25,28 +24,21 @@ public:
     static QString defaultConfigFileName();
     static QString defaultConfigPath();
 
-protected slots:
-    void onReadyReadDataFromManagementServer();
 
 private:
     QString configPath() const;
     bool openVpnProcessIsRunning() const;
     bool sendTermSignal();
     void readOpenVpnConfiguration(const QJsonObject &configuration);
-    void disconnectFromManagementServer();
+    void handle_cli_message(QString message);
     void killOpenVpnProcess();
     void sendByteCount();
     void sendInitialData();
-    void sendManagementCommand(const QString& command);
 
-    const QString m_managementHost = "127.0.0.1";
+    QHash<QRemoteObjectPendingCallWatcher*, QTimer*> m_watchers;
-    const unsigned int m_managementPort = 57775;
-
-    ManagementServer m_managementServer;
     QString m_configFileName;
     QTemporaryFile m_configFile;
 
-    uint selectMgmtPort();
 
 private:
     void updateRouteGateway(QString line);

client/utilities.cpp

@@ -226,13 +226,13 @@ QStringList Utils::summarizeRoutes(const QStringList &ips, const QString cidr)
 QString Utils::openVpnExecPath()
 {
 #ifdef Q_OS_WIN
-    return Utils::executable("openvpn/openvpn", true);
+    return Utils::executable("openvpn/ovpncli", true);
 #elif defined Q_OS_LINUX
     // We have service that runs OpenVPN on Linux. We need to make same
     // path for client and service.
-    return Utils::executable("../../client/bin/openvpn", true);
+    return Utils::executable("../../client/bin/ovpncli", true);
 #else
-    return Utils::executable("/openvpn", true);
+    return Utils::executable("/ovpncli", true);
 #endif
 }
 

service/server/tapcontroller_win.cpp

@@ -261,7 +261,7 @@ QString TapController::getTapInstallPath()
 
 QString TapController::getOpenVpnPath()
 {
-    return qApp->applicationDirPath() + "\\openvpn\\openvpn.exe";
+    return qApp->applicationDirPath() + "\\openvpn\\ovpncli.exe";
 }
 
 QString TapController::getTapDriverDir()