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/*
Copyright (C) 2009-2010 Collabora Ltd <info@collabora.co.uk>
@author George Goldberg <george.goldberg@collabora.co.uk>
@author George Kiagiadakis <george.kiagiadakis@collabora.co.uk>
Copyright (C) 2007 Alessandro Praduroux <pradu@pradu.it>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QtCore/QSocketNotifier>
#include <QDebug>
#include <poll.h>
#include <strings.h> //for bzero()
#include "rfbclient.h"
#include "connectiondialog.h"
#include "krfbconfig.h"
#include "sockethelpers.h"
#include "events.h"
struct RfbClient::Private
{
Private(rfbClientPtr client) :
controlEnabled(KrfbConfig::allowDesktopControl()),
client(client)
{}
bool controlEnabled;
rfbClientPtr client;
QSocketNotifier *notifier;
QString remoteAddressString;
};
RfbClient::RfbClient(rfbClientPtr client, QObject* parent)
: QObject(parent), d(new Private(client))
{
d->remoteAddressString = peerAddress(d->client->sock) + ":" +
QString::number(peerPort(d->client->sock));
d->notifier = new QSocketNotifier(client->sock, QSocketNotifier::Read, this);
d->notifier->setEnabled(false);
connect(d->notifier, &QSocketNotifier::activated, this, &RfbClient::onSocketActivated);
}
RfbClient::~RfbClient()
{
//qDebug();
delete d;
}
QString RfbClient::name() const
{
return d->remoteAddressString;
}
//static
bool RfbClient::controlCanBeEnabled()
{
return KrfbConfig::allowDesktopControl();
}
bool RfbClient::controlEnabled() const
{
return d->controlEnabled;
}
void RfbClient::setControlEnabled(bool enabled)
{
if (controlCanBeEnabled() && d->controlEnabled != enabled) {
d->controlEnabled = enabled;
Q_EMIT controlEnabledChanged(enabled);
}
}
bool RfbClient::isOnHold() const
{
return d->client->onHold ? true : false;
}
void RfbClient::setOnHold(bool onHold)
{
if (isOnHold() != onHold) {
d->client->onHold = onHold;
d->notifier->setEnabled(!onHold);
Q_EMIT holdStatusChanged(onHold);
}
}
void RfbClient::closeConnection()
{
d->notifier->setEnabled(false);
rfbCloseClient(d->client);
rfbClientConnectionGone(d->client);
}
rfbClientPtr RfbClient::getRfbClientPtr()
{
return d->client;
}
void RfbClient::handleKeyboardEvent(bool down, rfbKeySym keySym)
{
if (d->controlEnabled) {
EventHandler::handleKeyboard(down, keySym);
}
}
void RfbClient::handleMouseEvent(int buttonMask, int x, int y)
{
if (d->controlEnabled) {
EventHandler::handlePointer(buttonMask, x, y);
}
}
void RfbClient::onSocketActivated()
{
//Process not only one, but all pending messages.
//poll() idea/code copied from vino:
// Copyright (C) 2003 Sun Microsystems, Inc.
// License: GPL v2 or later
struct pollfd pollfd = { d->client->sock, POLLIN|POLLPRI, 0 };
while(poll(&pollfd, 1, 0) == 1) {
rfbProcessClientMessage(d->client);
//This is how we handle disconnection.
//if rfbProcessClientMessage() finds out that it can't read the socket,
//it closes it and sets it to -1. So, we just have to check this here
//and call rfbClientConnectionGone() if necessary. This will call
//the clientGoneHook which in turn will remove this RfbClient instance
//from the server manager and will call deleteLater() to delete it
if (d->client->sock == -1) {
//qDebug() << "disconnected from socket signal";
d->notifier->setEnabled(false);
rfbClientConnectionGone(d->client);
break;
}
}
}
void RfbClient::update()
{
rfbUpdateClient(d->client);
//This is how we handle disconnection.
//if rfbUpdateClient() finds out that it can't write to the socket,
//it closes it and sets it to -1. So, we just have to check this here
//and call rfbClientConnectionGone() if necessary. This will call
//the clientGoneHook which in turn will remove this RfbClient instance
//from the server manager and will call deleteLater() to delete it
if (d->client->sock == -1) {
//qDebug() << "disconnected during update";
d->notifier->setEnabled(false);
rfbClientConnectionGone(d->client);
}
}
//*************
PendingRfbClient::PendingRfbClient(rfbClientPtr client, QObject *parent)
: QObject(parent), m_rfbClient(client)
{
m_rfbClient->clientData = this;
}
PendingRfbClient::~PendingRfbClient()
{}
void PendingRfbClient::accept(RfbClient *newClient)
{
//qDebug() << "accepted connection";
m_rfbClient->clientData = newClient;
newClient->setOnHold(false);
Q_EMIT finished(newClient);
deleteLater();
}
static void clientGoneHookNoop(rfbClientPtr cl) { Q_UNUSED(cl); }
void PendingRfbClient::reject()
{
//qDebug() << "refused connection";
//override the clientGoneHook that was previously set by RfbServer
m_rfbClient->clientGoneHook = clientGoneHookNoop;
rfbCloseClient(m_rfbClient);
rfbClientConnectionGone(m_rfbClient);
Q_EMIT finished(NULL);
deleteLater();
}
bool PendingRfbClient::checkPassword(const QByteArray & encryptedPassword)
{
Q_UNUSED(encryptedPassword);
return m_rfbClient->screen->authPasswdData == (void*)0;
}
bool PendingRfbClient::vncAuthCheckPassword(const QByteArray& password, const QByteArray& encryptedPassword) const
{
if (password.isEmpty() && encryptedPassword.isEmpty()) {
return true;
}
char passwd[MAXPWLEN];
unsigned char challenge[CHALLENGESIZE];
memcpy(challenge, m_rfbClient->authChallenge, CHALLENGESIZE);
bzero(passwd, MAXPWLEN);
if (!password.isEmpty()) {
strncpy(passwd, password,
(MAXPWLEN <= password.size()) ? MAXPWLEN : password.size());
}
rfbEncryptBytes(challenge, passwd);
return memcmp(challenge, encryptedPassword, encryptedPassword.size()) == 0;
}
#include "rfbclient.moc"
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