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/*
* Copyright (C) 2008-2010 The QXmpp developers
*
* Author:
* Jeremy Lainé
*
* Source:
* http://code.google.com/p/qxmpp
*
* This file is a part of QXmpp library.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
*/
#include <QDomElement>
#include <QSslKey>
#include <QSslSocket>
#include "QXmppConstants.h"
#include "QXmppDialback.h"
#include "QXmppIncomingServer.h"
#include "QXmppOutgoingServer.h"
#include "QXmppStreamFeatures.h"
#include "QXmppUtils.h"
class QXmppIncomingServerPrivate
{
public:
QString authenticated;
QString domain;
QString localStreamId;
};
/// Constructs a new incoming server stream.
///
/// \param socket The socket for the XMPP stream.
/// \param domain The local domain.
/// \param parent The parent QObject for the stream (optional).
///
QXmppIncomingServer::QXmppIncomingServer(QSslSocket *socket, const QString &domain, QObject *parent)
: QXmppStream(parent),
d(new QXmppIncomingServerPrivate)
{
setObjectName("S2S-in");
setSocket(socket);
d->domain = domain;
}
/// Destroys the current stream.
QXmppIncomingServer::~QXmppIncomingServer()
{
delete d;
}
/// Returns the stream's identifier.
///
QString QXmppIncomingServer::localStreamId() const
{
return d->localStreamId;
}
void QXmppIncomingServer::handleStream(const QDomElement &streamElement)
{
if (!streamElement.attribute("from").isEmpty())
setObjectName("S2S-in-" + streamElement.attribute("from"));
// start stream
d->localStreamId = generateStanzaHash().toAscii();
QString data = QString("<?xml version='1.0'?><stream:stream"
" xmlns='%1' xmlns:db='%2' xmlns:stream='%3'"
" id='%4' version=\"1.0\">").arg(
ns_server,
ns_server_dialback,
ns_stream,
d->localStreamId);
sendData(data.toUtf8());
// send stream features
QXmppStreamFeatures features;
if (!socket()->isEncrypted() && !socket()->localCertificate().isNull() && !socket()->privateKey().isNull())
features.setTlsMode(QXmppStreamFeatures::Enabled);
sendPacket(features);
}
void QXmppIncomingServer::handleStanza(const QDomElement &stanza)
{
const QString ns = stanza.namespaceURI();
if (ns == ns_tls && stanza.tagName() == "starttls")
{
sendData("<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
socket()->flush();
socket()->startServerEncryption();
return;
}
else if (QXmppDialback::isDialback(stanza))
{
QXmppDialback request;
request.parse(stanza);
// check the request is valid
if (!request.type().isEmpty() ||
request.from().isEmpty() ||
request.to() != d->domain ||
request.key().isEmpty())
{
warning("Invalid dialback received");
return;
}
const QString domain = request.from();
setObjectName("S2S-in-" + domain);
if (request.command() == QXmppDialback::Result)
{
// establish dialback connection
QXmppOutgoingServer *stream = new QXmppOutgoingServer(d->domain, this);
stream->setLogger(logger());
stream->setObjectName("S2S-dialback-" + domain);
bool check = connect(stream, SIGNAL(dialbackResponseReceived(QXmppDialback)),
this, SLOT(slotDialbackResponseReceived(QXmppDialback)));
Q_ASSERT(check);
Q_UNUSED(check);
stream->setVerify(d->localStreamId, request.key());
stream->connectToHost(domain);
}
else if (request.command() == QXmppDialback::Verify)
{
emit dialbackRequestReceived(request);
}
}
else if (!d->authenticated.isEmpty() &&
jidToDomain(stanza.attribute("from")) == d->authenticated)
{
// relay stanza if the remote party is authenticated
emit elementReceived(stanza);
} else {
warning("Received an element, but remote party is not authenticated");
}
}
/// Returns true if the socket is connected and the remote server is
/// authenticated.
///
bool QXmppIncomingServer::isConnected() const
{
return QXmppStream::isConnected() && !d->authenticated.isEmpty();
}
/// Handles a dialback response received from the authority server.
///
/// \param response
///
void QXmppIncomingServer::slotDialbackResponseReceived(const QXmppDialback &dialback)
{
QXmppOutgoingServer *stream = qobject_cast<QXmppOutgoingServer*>(sender());
if (!stream ||
dialback.command() != QXmppDialback::Verify ||
dialback.id() != d->localStreamId ||
dialback.from() != stream->remoteDomain())
return;
// relay verify response
QXmppDialback response;
response.setCommand(QXmppDialback::Result);
response.setTo(dialback.from());
response.setFrom(d->domain);
response.setType(dialback.type());
sendPacket(response);
// check for success
if (response.type() == "valid")
{
info("Incoming stream is ready");
d->authenticated = dialback.from();
emit connected();
} else {
disconnectFromHost();
}
// disconnect dialback
stream->disconnectFromHost();
stream->deleteLater();
}
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