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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 "QXmppOutgoingServer.h"
#include "QXmppSrvInfo.h"
#include "QXmppStreamFeatures.h"
#include "QXmppUtils.h"
class QXmppOutgoingServerPrivate
{
public:
QString localDomain;
QString localStreamKey;
QString remoteDomain;
QString verifyId;
QString verifyKey;
bool ready;
};
/// Constructs a new outgoing server-to-server stream.
///
/// \param socket
/// \param domain the local domain
/// \param parent the parent object
///
QXmppOutgoingServer::QXmppOutgoingServer(const QString &domain, QObject *parent)
: QXmppStream(parent),
d(new QXmppOutgoingServerPrivate)
{
QSslSocket *socket = new QSslSocket(this);
setSocket(socket);
d->localDomain = domain;
d->ready = false;
bool check = connect(socket, SIGNAL(sslErrors(QList<QSslError>)),
this, SLOT(slotSslErrors(QList<QSslError>)));
Q_ASSERT(check);
Q_UNUSED(check);
}
/// Destroys the stream.
///
QXmppOutgoingServer::~QXmppOutgoingServer()
{
delete d;
}
void QXmppOutgoingServer::connectToHost(const QString &domain)
{
d->remoteDomain = domain;
QString host;
quint16 port;
// lookup server for domain
debug(QString("Looking up server for domain %1").arg(domain));
QXmppSrvInfo serviceInfo = QXmppSrvInfo::fromName("_xmpp-server._tcp." + domain);
if (!serviceInfo.records().isEmpty())
{
// take the first returned record
host = serviceInfo.records().first().hostName();
port = serviceInfo.records().first().port();
} else {
// as a fallback, use domain as the host name
warning(QString("Lookup for domain %1 failed: %2").arg(domain, serviceInfo.errorString()));
host = domain;
port = 5269;
}
// connect to server
info(QString("Connecting to %1:%2").arg(host, QString::number(port)));
socket()->connectToHost(host, port);
}
void QXmppOutgoingServer::handleStart()
{
QString data = QString("<?xml version='1.0'?><stream:stream"
" xmlns='%1' xmlns:db='%2' xmlns:stream='%3' version='1.0'>").arg(
ns_server,
ns_server_dialback,
ns_stream);
sendData(data.toUtf8());
}
void QXmppOutgoingServer::handleStream(const QDomElement &streamElement)
{
Q_UNUSED(streamElement);
}
void QXmppOutgoingServer::handleStanza(const QDomElement &stanza)
{
const QString ns = stanza.namespaceURI();
if(QXmppStreamFeatures::isStreamFeatures(stanza))
{
QXmppStreamFeatures features;
features.parse(stanza);
if (!socket()->isEncrypted())
{
// check we can satisfy TLS constraints
if (!socket()->supportsSsl() &&
features.tlsMode() == QXmppStreamFeatures::Required)
{
warning("Disconnecting as TLS is required, but SSL support is not available");
disconnectFromHost();
return;
}
// enable TLS if possible
if (socket()->supportsSsl() &&
features.tlsMode() != QXmppStreamFeatures::Disabled)
{
sendData("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
return;
}
}
if (!d->localStreamKey.isEmpty())
{
// send dialback key
QXmppDialback dialback;
dialback.setCommand(QXmppDialback::Result);
dialback.setFrom(d->localDomain);
dialback.setTo(d->remoteDomain);
dialback.setKey(d->localStreamKey);
sendPacket(dialback);
}
else if (!d->verifyId.isEmpty() && !d->verifyKey.isEmpty())
{
// send dialback verify
QXmppDialback verify;
verify.setCommand(QXmppDialback::Verify);
verify.setId(d->verifyId);
verify.setFrom(d->localDomain);
verify.setTo(d->remoteDomain);
verify.setKey(d->verifyKey);
sendPacket(verify);
}
}
else if (ns == ns_tls)
{
if (stanza.tagName() == "proceed")
{
debug("Starting encryption");
socket()->startClientEncryption();
return;
}
}
else if (QXmppDialback::isDialback(stanza))
{
QXmppDialback response;
response.parse(stanza);
// check the request is valid
if (response.from().isEmpty() ||
response.to() != d->localDomain ||
response.type().isEmpty())
{
warning("Invalid dialback response received");
return;
}
if (response.command() == QXmppDialback::Result)
{
if (response.type() == "valid")
{
info("Outgoing stream is ready");
d->ready = true;
emit connected();
}
}
else if (response.command() == QXmppDialback::Verify)
{
emit dialbackResponseReceived(response);
}
}
}
/// Returns true if the socket is connected and authentication succeeded.
///
bool QXmppOutgoingServer::isConnected() const
{
return QXmppStream::isConnected() && d->ready;
}
QString QXmppOutgoingServer::localStreamKey() const
{
return d->localStreamKey;
}
void QXmppOutgoingServer::setLocalStreamKey(const QString &key)
{
d->localStreamKey = key;
}
void QXmppOutgoingServer::setVerify(const QString &id, const QString &key)
{
d->verifyId = id;
d->verifyKey = key;
}
QString QXmppOutgoingServer::remoteDomain() const
{
return d->remoteDomain;
}
void QXmppOutgoingServer::slotSslErrors(const QList<QSslError> &errors)
{
warning("SSL errors");
for(int i = 0; i < errors.count(); ++i)
warning(errors.at(i).errorString());
socket()->ignoreSslErrors();
}
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