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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms and
** conditions see http://www.qt.io/terms-conditions. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "tunnel.h"
#include <ssh/sshconnection.h>
#include <ssh/sshdirecttcpiptunnel.h>
#include <QCoreApplication>
#include <QTcpServer>
#include <QTcpSocket>
#include <QTimer>
#include <cstdlib>
#include <iostream>
const QByteArray ServerDataPrefix("Received the following data: ");
const QByteArray TestData("Urgsblubb?");
using namespace QSsh;
Tunnel::Tunnel(const SshConnectionParameters ¶meters, QObject *parent)
: QObject(parent),
m_connection(new SshConnection(parameters, this)),
m_tunnelServer(new QTcpServer(this)),
m_expectingChannelClose(false)
{
connect(m_connection, SIGNAL(connected()), SLOT(handleConnected()));
connect(m_connection, SIGNAL(error(QSsh::SshError)), SLOT(handleConnectionError()));
}
Tunnel::~Tunnel()
{
}
void Tunnel::run()
{
std::cout << "Connecting to SSH server..." << std::endl;
m_connection->connectToHost();
}
void Tunnel::handleConnectionError()
{
std::cerr << "SSH connection error: " << qPrintable(m_connection->errorString()) << std::endl;
qApp->exit(EXIT_FAILURE);
}
void Tunnel::handleConnected()
{
std::cout << "Opening server side..." << std::endl;
if (!m_tunnelServer->listen(QHostAddress::LocalHost)) {
std::cerr << "Error opening port: "
<< m_tunnelServer->errorString().toLocal8Bit().constData() << std::endl;
qApp->exit(EXIT_FAILURE);
return;
}
m_forwardedPort = m_tunnelServer->serverPort();
connect(m_tunnelServer, SIGNAL(newConnection()), SLOT(handleNewConnection()));
m_tunnel = m_connection->createTunnel(m_forwardedPort);
connect(m_tunnel.data(), SIGNAL(initialized()), SLOT(handleInitialized()));
connect(m_tunnel.data(), SIGNAL(error(QString)), SLOT(handleTunnelError(QString)));
connect(m_tunnel.data(), SIGNAL(readyRead()), SLOT(handleServerData()));
connect(m_tunnel.data(), SIGNAL(tunnelClosed()), SLOT(handleTunnelClosed()));
std::cout << "Initializing tunnel..." << std::endl;
m_tunnel->initialize();
}
void Tunnel::handleInitialized()
{
std::cout << "Writing data into the tunnel..." << std::endl;
m_tunnel->write(TestData);
QTimer * const timeoutTimer = new QTimer(this);
connect(timeoutTimer, SIGNAL(timeout()), SLOT(handleTimeout()));
timeoutTimer->start(10000);
}
void Tunnel::handleServerData()
{
m_dataReceivedFromServer += m_tunnel->readAll();
if (m_dataReceivedFromServer == ServerDataPrefix + TestData) {
std::cout << "Data exchange successful. Closing server socket..." << std::endl;
m_expectingChannelClose = true;
m_tunnelSocket->close();
}
}
void Tunnel::handleTunnelError(const QString &reason)
{
std::cerr << "Tunnel error: " << reason.toLocal8Bit().constData() << std::endl;
qApp->exit(EXIT_FAILURE);
}
void Tunnel::handleTunnelClosed()
{
if (m_expectingChannelClose) {
std::cout << "Successfully detected channel close." << std::endl;
std::cout << "Test finished successfully." << std::endl;
qApp->quit();
} else {
std::cerr << "Error: Remote host closed channel." << std::endl;
qApp->exit(EXIT_FAILURE);
}
}
void Tunnel::handleNewConnection()
{
m_tunnelSocket = m_tunnelServer->nextPendingConnection();
m_tunnelServer->close();
connect(m_tunnelSocket, SIGNAL(error(QAbstractSocket::SocketError)), SLOT(handleSocketError()));
connect(m_tunnelSocket, SIGNAL(readyRead()), SLOT(handleClientData()));
handleClientData();
}
void Tunnel::handleSocketError()
{
std::cerr << "Socket error: " << m_tunnelSocket->errorString().toLocal8Bit().constData()
<< std::endl;
qApp->exit(EXIT_FAILURE);
}
void Tunnel::handleClientData()
{
m_dataReceivedFromClient += m_tunnelSocket->readAll();
if (m_dataReceivedFromClient == TestData) {
std::cout << "Client data successfully received by server, now sending data to client..."
<< std::endl;
m_tunnelSocket->write(ServerDataPrefix + m_dataReceivedFromClient);
}
}
void Tunnel::handleTimeout()
{
std::cerr << "Error: Timeout waiting for test completion." << std::endl;
qApp->exit(EXIT_FAILURE);
}
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