move files common to client/server into "base"

1 files changed, 0 insertions, 2581 deletions

diff --git a/src/QXmppStun.cpp b/src/QXmppStun.cpp
deleted file mode 100644
index 16cef928..00000000
--- a/src/QXmppStun.cpp
+++ /dev/null
@@ -1,2581 +0,0 @@
-/*
- * Copyright (C) 2008-2011 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.
- *
- */
-
-#define QXMPP_DEBUG_STUN
-
-#include <QCryptographicHash>
-#include <QHostInfo>
-#include <QNetworkInterface>
-#include <QUdpSocket>
-#include <QTimer>
-
-#include "QXmppStun.h"
-#include "QXmppUtils.h"
-
-#define ID_SIZE 12
-#define STUN_RTO_INTERVAL 500
-#define STUN_RTO_MAX      7
-
-static const quint32 STUN_MAGIC = 0x2112A442;
-static const quint16 STUN_HEADER = 20;
-static const quint8 STUN_IPV4 = 0x01;
-static const quint8 STUN_IPV6 = 0x02;
-
-enum AttributeType {
-    MappedAddress    = 0x0001, // RFC5389
-    ChangeRequest    = 0x0003, // RFC5389
-    SourceAddress    = 0x0004, // RFC5389
-    ChangedAddress   = 0x0005, // RFC5389
-    Username         = 0x0006, // RFC5389
-    MessageIntegrity = 0x0008, // RFC5389
-    ErrorCode        = 0x0009, // RFC5389
-    ChannelNumber    = 0x000c, // RFC5766 : TURN
-    Lifetime         = 0x000d, // RFC5766 : TURN
-    XorPeerAddress   = 0x0012, // RFC5766 : TURN
-    DataAttr         = 0x0013, // RFC5766 : TURN
-    Realm            = 0x0014, // RFC5389
-    Nonce            = 0x0015, // RFC5389
-    XorRelayedAddress= 0x0016, // RFC5766 : TURN
-    EvenPort         = 0x0018, // RFC5766 : TURN
-    RequestedTransport=0x0019, // RFC5766 : TURN
-    XorMappedAddress = 0x0020, // RFC5389
-    ReservationToken = 0x0022, // RFC5766 : TURN
-    Priority         = 0x0024, // RFC5245
-    UseCandidate     = 0x0025, // RFC5245
-    Software         = 0x8022, // RFC5389
-    Fingerprint      = 0x8028, // RFC5389
-    IceControlled    = 0x8029, // RFC5245
-    IceControlling   = 0x802a, // RFC5245
-    OtherAddress     = 0x802c, // RFC5780
-};
-
-// FIXME : we need to set local preference to discriminate between
-// multiple IP addresses
-static quint32 candidatePriority(const QXmppJingleCandidate &candidate, int localPref = 65535)
-{
-    int typePref;
-    switch (candidate.type())
-    {
-    case QXmppJingleCandidate::HostType:
-        typePref = 126;
-        break;
-    case QXmppJingleCandidate::PeerReflexiveType:
-        typePref = 110;
-        break;
-    case QXmppJingleCandidate::ServerReflexiveType:
-        typePref = 100;
-        break;
-    default:
-        typePref = 0;
-    }
-
-    return (1 << 24) * typePref + \
-           (1 << 8) * localPref + \
-           (256 - candidate.component());
-}
-
-static bool isIPv6LinkLocalAddress(const QHostAddress &addr)
-{
-    if (addr.protocol() != QAbstractSocket::IPv6Protocol)
-        return false;
-    Q_IPV6ADDR ipv6addr = addr.toIPv6Address();
-    return (((ipv6addr[0] << 8) + ipv6addr[1]) & 0xffc0) == 0xfe80;
-}
-
-static bool decodeAddress(QDataStream &stream, quint16 a_length, QHostAddress &address, quint16 &port, const QByteArray &xorId = QByteArray())
-{
-    if (a_length < 4)
-        return false;
-    quint8 reserved, protocol;
-    quint16 rawPort;
-    stream >> reserved;
-    stream >> protocol;
-    stream >> rawPort;
-    if (xorId.isEmpty())
-        port = rawPort;
-    else
-        port = rawPort ^ (STUN_MAGIC >> 16);
-    if (protocol == STUN_IPV4)
-    {
-        if (a_length != 8)
-            return false;
-        quint32 addr;
-        stream >> addr;
-        if (xorId.isEmpty())
-            address = QHostAddress(addr);
-        else
-            address = QHostAddress(addr ^ STUN_MAGIC);
-    } else if (protocol == STUN_IPV6) {
-        if (a_length != 20)
-            return false;
-        Q_IPV6ADDR addr;
-        stream.readRawData((char*)&addr, sizeof(addr));
-        if (!xorId.isEmpty())
-        {
-            QByteArray xpad;
-            QDataStream(&xpad, QIODevice::WriteOnly) << STUN_MAGIC;
-            xpad += xorId;
-            for (int i = 0; i < 16; i++)
-                addr[i] ^= xpad[i];
-        }
-        address = QHostAddress(addr);
-    } else {
-        return false;
-    }
-    return true;
-}
-
-static void encodeAddress(QDataStream &stream, quint16 type, const QHostAddress &address, quint16 port, const QByteArray &xorId = QByteArray())
-{
-    const quint8 reserved = 0;
-    if (address.protocol() == QAbstractSocket::IPv4Protocol)
-    {
-        stream << type;
-        stream << quint16(8);
-        stream << reserved;
-        stream << quint8(STUN_IPV4);
-        quint32 addr = address.toIPv4Address();
-        if (!xorId.isEmpty())
-        {
-            port ^= (STUN_MAGIC >> 16);
-            addr ^= STUN_MAGIC;
-        }
-        stream << port;
-        stream << addr;
-    } else if (address.protocol() == QAbstractSocket::IPv6Protocol) {
-        stream << type;
-        stream << quint16(20);
-        stream << reserved;
-        stream << quint8(STUN_IPV6);
-        Q_IPV6ADDR addr = address.toIPv6Address();
-        if (!xorId.isEmpty())
-        {
-            port ^= (STUN_MAGIC >> 16);
-            QByteArray xpad;
-            QDataStream(&xpad, QIODevice::WriteOnly) << STUN_MAGIC;
-            xpad += xorId;
-            for (int i = 0; i < 16; i++)
-                addr[i] ^= xpad[i];
-        }
-        stream << port;
-        stream.writeRawData((char*)&addr, sizeof(addr));
-    } else {
-        qWarning("Cannot write STUN attribute for unknown IP version");
-    }
-}
-
-static void addAddress(QDataStream &stream, quint16 type, const QHostAddress &host, quint16 port, const QByteArray &xorId = QByteArray())
-{
-    if (port && !host.isNull() &&
-        (host.protocol() == QAbstractSocket::IPv4Protocol ||
-         host.protocol() == QAbstractSocket::IPv6Protocol))
-    {
-        encodeAddress(stream, type, host, port, xorId);
-    }
-}
-
-static void encodeString(QDataStream &stream, quint16 type, const QString &string)
-{
-    const QByteArray utf8string = string.toUtf8();
-    stream << type;
-    stream << quint16(utf8string.size());
-    stream.writeRawData(utf8string.data(), utf8string.size());
-    if (utf8string.size() % 4)
-    {
-        const QByteArray padding(4 - (utf8string.size() % 4), 0);
-        stream.writeRawData(padding.data(), padding.size());
-    }
-}
-
-static void setBodyLength(QByteArray &buffer, qint16 length)
-{
-    QDataStream stream(&buffer, QIODevice::WriteOnly);
-    stream.device()->seek(2);
-    stream << length;
-}
-
-/// Constructs a new QXmppStunMessage.
-
-QXmppStunMessage::QXmppStunMessage()
-    : errorCode(0),
-    changedPort(0),
-    mappedPort(0),
-    otherPort(0),
-    sourcePort(0),
-    xorMappedPort(0),
-    xorPeerPort(0),
-    xorRelayedPort(0),
-    useCandidate(false),
-    m_cookie(STUN_MAGIC),
-    m_type(0),
-    m_changeRequest(0),
-    m_channelNumber(0),
-    m_lifetime(0),
-    m_priority(0)
-{
-    m_id = QByteArray(ID_SIZE, 0);
-}
-
-quint32 QXmppStunMessage::cookie() const
-{
-    return m_cookie;
-}
-
-void QXmppStunMessage::setCookie(quint32 cookie)
-{
-    m_cookie = cookie;
-}
-
-QByteArray QXmppStunMessage::id() const
-{
-    return m_id;
-}
-
-void QXmppStunMessage::setId(const QByteArray &id)
-{
-    Q_ASSERT(id.size() == ID_SIZE);
-    m_id = id;
-}
-
-quint16 QXmppStunMessage::messageClass() const
-{
-    return m_type & 0x0110;
-}
-
-quint16 QXmppStunMessage::messageMethod() const
-{
-    return m_type & 0x3eef;
-}
-
-quint16 QXmppStunMessage::type() const
-{
-    return m_type;
-}
-
-void QXmppStunMessage::setType(quint16 type)
-{
-    m_type = type;
-}
-
-/// Returns the CHANGE-REQUEST attribute, indicating whether to change
-/// the IP and / or port from which the response is sent.
-
-quint32 QXmppStunMessage::changeRequest() const
-{
-    return m_changeRequest;
-}
-
-/// Sets the CHANGE-REQUEST attribute, indicating whether to change
-/// the IP and / or port from which the response is sent.
-///
-/// \param changeRequest
-
-void QXmppStunMessage::setChangeRequest(quint32 changeRequest)
-{
-    m_changeRequest = changeRequest;
-    m_attributes << ChangeRequest;
-}
-
-/// Returns the CHANNEL-NUMBER attribute.
-
-quint16 QXmppStunMessage::channelNumber() const
-{
-    return m_channelNumber;
-}
-
-/// Sets the CHANNEL-NUMBER attribute.
-///
-/// \param channelNumber
-
-void QXmppStunMessage::setChannelNumber(quint16 channelNumber)
-{
-    m_channelNumber = channelNumber;
-    m_attributes << ChannelNumber;
-}
-
-/// Returns the DATA attribute.
-
-QByteArray QXmppStunMessage::data() const
-{
-    return m_data;
-}
-
-/// Sets the DATA attribute.
-
-void QXmppStunMessage::setData(const QByteArray &data)
-{
-    m_data = data;
-    m_attributes << DataAttr;
-}
-
-/// Returns the LIFETIME attribute, indicating the duration in seconds for
-/// which the server will maintain an allocation.
-
-quint32 QXmppStunMessage::lifetime() const
-{
-    return m_lifetime;
-}
-
-/// Sets the LIFETIME attribute, indicating the duration in seconds for
-/// which the server will maintain an allocation.
-///
-/// \param lifetime
-
-void QXmppStunMessage::setLifetime(quint32 lifetime)
-{
-    m_lifetime = lifetime;
-    m_attributes << Lifetime;
-}
-
-/// Returns the NONCE attribute.
-
-QByteArray QXmppStunMessage::nonce() const
-{
-    return m_nonce;
-}
-
-/// Sets the NONCE attribute.
-///
-/// \param nonce
-
-void QXmppStunMessage::setNonce(const QByteArray &nonce)
-{
-    m_nonce = nonce;
-    m_attributes << Nonce;
-}
-
-/// Returns the PRIORITY attribute, the priority that would be assigned to
-/// a peer reflexive candidate discovered during the ICE check.
-
-quint32 QXmppStunMessage::priority() const
-{
-    return m_priority;
-}
-
-/// Sets the PRIORITY attribute, the priority that would be assigned to
-/// a peer reflexive candidate discovered during the ICE check.
-///
-/// \param priority
-
-void QXmppStunMessage::setPriority(quint32 priority)
-{
-    m_priority = priority;
-    m_attributes << Priority;
-}
-
-/// Returns the REALM attribute.
-
-QString QXmppStunMessage::realm() const
-{
-    return m_realm;
-}
-
-/// Sets the REALM attribute.
-///
-/// \param realm
-
-void QXmppStunMessage::setRealm(const QString &realm)
-{
-    m_realm = realm;
-    m_attributes << Realm;
-}
-
-/// Returns the REQUESTED-TRANSPORT attribute.
-
-quint8 QXmppStunMessage::requestedTransport() const
-{
-    return m_requestedTransport;
-}
-
-/// Sets the REQUESTED-TRANSPORT attribute.
-///
-/// \param requestedTransport
-
-void QXmppStunMessage::setRequestedTransport(quint8 requestedTransport)
-{
-    m_requestedTransport = requestedTransport;
-    m_attributes << RequestedTransport;
-}
-
-/// Returns the RESERVATION-TOKEN attribute.
-
-QByteArray QXmppStunMessage::reservationToken() const
-{
-    return m_reservationToken;
-}
-
-/// Sets the RESERVATION-TOKEN attribute.
-///
-/// \param reservationToken
-
-void QXmppStunMessage::setReservationToken(const QByteArray &reservationToken)
-{
-    m_reservationToken = reservationToken;
-    m_reservationToken.resize(8);
-    m_attributes << ReservationToken;
-}
-
-/// Returns the SOFTWARE attribute, containing a textual description of the
-/// software being used.
-
-QString QXmppStunMessage::software() const
-{
-    return m_software;
-}
-
-/// Sets the SOFTWARE attribute, containing a textual description of the
-/// software being used.
-///
-/// \param software
-
-void QXmppStunMessage::setSoftware(const QString &software)
-{
-    m_software = software;
-    m_attributes << Software;
-}
-
-/// Returns the USERNAME attribute, containing the username to use for
-/// authentication.
-
-QString QXmppStunMessage::username() const
-{
-    return m_username;
-}
-
-/// Sets the USERNAME attribute, containing the username to use for
-/// authentication.
-///
-/// \param username
-
-void QXmppStunMessage::setUsername(const QString &username)
-{
-    m_username = username;
-    m_attributes << Username;
-}
-
-/// Decodes a QXmppStunMessage and checks its integrity using the given key.
-///
-/// \param buffer
-/// \param key
-/// \param errors
-
-bool QXmppStunMessage::decode(const QByteArray &buffer, const QByteArray &key, QStringList *errors)
-{
-    QStringList silent;
-    if (!errors)
-        errors = &silent;
-
-    if (buffer.size() < STUN_HEADER)
-    {
-        *errors << QLatin1String("Received a truncated STUN packet");
-        return false;
-    }
-
-    // parse STUN header
-    QDataStream stream(buffer);
-    quint16 length;
-    stream >> m_type;
-    stream >> length;
-    stream >> m_cookie;
-    stream.readRawData(m_id.data(), m_id.size());
-
-    if (length != buffer.size() - STUN_HEADER)
-    {
-        *errors << QLatin1String("Received an invalid STUN packet");
-        return false;
-    }
-
-    // parse STUN attributes
-    int done = 0;
-    bool after_integrity = false;
-    while (done < length)
-    {
-        quint16 a_type, a_length;
-        stream >> a_type;
-        stream >> a_length;
-        const int pad_length = 4 * ((a_length + 3) / 4) - a_length;
-
-        // only FINGERPRINT is allowed after MESSAGE-INTEGRITY
-        if (after_integrity && a_type != Fingerprint)
-        {
-            *errors << QString("Skipping attribute %1 after MESSAGE-INTEGRITY").arg(QString::number(a_type));
-            stream.skipRawData(a_length + pad_length);
-            done += 4 + a_length + pad_length;
-            continue;
-        }
-
-        if (a_type == Priority)
-        {
-            // PRIORITY
-            if (a_length != sizeof(m_priority))
-                return false;
-            stream >> m_priority;
-            m_attributes << Priority;
-
-        } else if (a_type == ErrorCode) {
-
-            // ERROR-CODE
-            if (a_length < 4)
-                return false;
-            quint16 reserved;
-            quint8 errorCodeHigh, errorCodeLow;
-            stream >> reserved;
-            stream >> errorCodeHigh;
-            stream >> errorCodeLow;
-            errorCode = errorCodeHigh * 100 + errorCodeLow;
-            QByteArray phrase(a_length - 4, 0);
-            stream.readRawData(phrase.data(), phrase.size());
-            errorPhrase = QString::fromUtf8(phrase);
-
-        } else if (a_type == UseCandidate) {
-
-            // USE-CANDIDATE
-            if (a_length != 0)
-                return false;
-            useCandidate = true;
-
-        } else if (a_type == ChannelNumber) {
-
-            // CHANNEL-NUMBER
-            if (a_length != 4)
-                return false;
-            stream >> m_channelNumber;
-            stream.skipRawData(2);
-            m_attributes << ChannelNumber;
-
-        } else if (a_type == DataAttr) {
-
-            // DATA
-            m_data.resize(a_length);
-            stream.readRawData(m_data.data(), m_data.size());
-            m_attributes << DataAttr;
-
-        } else if (a_type == Lifetime) {
-
-            // LIFETIME
-            if (a_length != sizeof(m_lifetime))
-                return false;
-            stream >> m_lifetime;
-            m_attributes << Lifetime;
-
-        } else if (a_type == Nonce) {
-
-            // NONCE
-            m_nonce.resize(a_length);
-            stream.readRawData(m_nonce.data(), m_nonce.size());
-            m_attributes << Nonce;
-
-        } else if (a_type == Realm) {
-
-            // REALM
-            QByteArray utf8Realm(a_length, 0);
-            stream.readRawData(utf8Realm.data(), utf8Realm.size());
-            m_realm = QString::fromUtf8(utf8Realm);
-            m_attributes << Realm;
-
-        } else if (a_type == RequestedTransport) {
-
-            // REQUESTED-TRANSPORT
-            if (a_length != 4)
-                return false;
-            stream >> m_requestedTransport;
-            stream.skipRawData(3);
-            m_attributes << RequestedTransport;
-
-        } else if (a_type == ReservationToken) {
-
-            // RESERVATION-TOKEN
-            if (a_length != 8)
-                return false;
-            m_reservationToken.resize(a_length);
-            stream.readRawData(m_reservationToken.data(), m_reservationToken.size());
-            m_attributes << ReservationToken;
-
-        } else if (a_type == Software) {
-
-            // SOFTWARE
-            QByteArray utf8Software(a_length, 0);
-            stream.readRawData(utf8Software.data(), utf8Software.size());
-            m_software = QString::fromUtf8(utf8Software);
-            m_attributes << Software;
-
-        } else if (a_type == Username) {
-
-            // USERNAME
-            QByteArray utf8Username(a_length, 0);
-            stream.readRawData(utf8Username.data(), utf8Username.size());
-            m_username = QString::fromUtf8(utf8Username);
-            m_attributes << Username;
-
-        } else if (a_type == MappedAddress) {
-
-            // MAPPED-ADDRESS
-            if (!decodeAddress(stream, a_length, mappedHost, mappedPort))
-            {
-                *errors << QLatin1String("Bad MAPPED-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == ChangeRequest) {
-
-            // CHANGE-REQUEST
-            if (a_length != sizeof(m_changeRequest))
-                return false;
-            stream >> m_changeRequest;
-            m_attributes << ChangeRequest;
-
-        } else if (a_type == SourceAddress) {
-
-            // SOURCE-ADDRESS
-            if (!decodeAddress(stream, a_length, sourceHost, sourcePort))
-            {
-                *errors << QLatin1String("Bad SOURCE-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == ChangedAddress) {
-
-            // CHANGED-ADDRESS
-            if (!decodeAddress(stream, a_length, changedHost, changedPort))
-            {
-                *errors << QLatin1String("Bad CHANGED-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == OtherAddress) {
-
-            // OTHER-ADDRESS
-            if (!decodeAddress(stream, a_length, otherHost, otherPort))
-            {
-                *errors << QLatin1String("Bad OTHER-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == XorMappedAddress) {
-
-            // XOR-MAPPED-ADDRESS
-            if (!decodeAddress(stream, a_length, xorMappedHost, xorMappedPort, m_id))
-            {
-                *errors << QLatin1String("Bad XOR-MAPPED-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == XorPeerAddress) {
-
-            // XOR-PEER-ADDRESS
-            if (!decodeAddress(stream, a_length, xorPeerHost, xorPeerPort, m_id))
-            {
-                *errors << QLatin1String("Bad XOR-PEER-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == XorRelayedAddress) {
-
-            // XOR-RELAYED-ADDRESS
-            if (!decodeAddress(stream, a_length, xorRelayedHost, xorRelayedPort, m_id))
-            {
-                *errors << QLatin1String("Bad XOR-RELAYED-ADDRESS");
-                return false;
-            }
-
-        } else if (a_type == MessageIntegrity) {
-
-            // MESSAGE-INTEGRITY
-            if (a_length != 20)
-                return false;
-            QByteArray integrity(20, 0);
-            stream.readRawData(integrity.data(), integrity.size());
-
-            // check HMAC-SHA1
-            if (!key.isEmpty())
-            {
-                QByteArray copy = buffer.left(STUN_HEADER + done);
-                setBodyLength(copy, done + 24);
-                if (integrity != generateHmacSha1(key, copy))
-                {
-                    *errors << QLatin1String("Bad message integrity");
-                    return false;
-                }
-            }
-
-            // from here onwards, only FINGERPRINT is allowed
-            after_integrity = true;
-
-        } else if (a_type == Fingerprint) {
-
-            // FINGERPRINT
-            if (a_length != 4)
-                return false;
-            quint32 fingerprint;
-            stream >> fingerprint;
-
-            // check CRC32
-            QByteArray copy = buffer.left(STUN_HEADER + done);
-            setBodyLength(copy, done + 8);
-            const quint32 expected = generateCrc32(copy) ^ 0x5354554eL;
-            if (fingerprint != expected)
-            {
-                *errors << QLatin1String("Bad fingerprint");
-                return false;
-            }
-
-            // stop parsing, no more attributes are allowed
-            return true;
-
-        } else if (a_type == IceControlling) {
-
-            /// ICE-CONTROLLING
-            if (a_length != 8)
-                return false;
-            iceControlling.resize(a_length);
-            stream.readRawData(iceControlling.data(), iceControlling.size());
-
-         } else if (a_type == IceControlled) {
-
-            /// ICE-CONTROLLED
-            if (a_length != 8)
-                return false;
-            iceControlled.resize(a_length);
-            stream.readRawData(iceControlled.data(), iceControlled.size());
-
-        } else {
-
-            // Unknown attribute
-            stream.skipRawData(a_length);
-            *errors << QString("Skipping unknown attribute %1").arg(QString::number(a_type));
-
-        }
-        stream.skipRawData(pad_length);
-        done += 4 + a_length + pad_length;
-    }
-    return true;
-}
-
-/// Encodes the current QXmppStunMessage, optionally calculating the
-/// message integrity attribute using the given key.
-///
-/// \param key
-/// \param addFingerprint
-
-QByteArray QXmppStunMessage::encode(const QByteArray &key, bool addFingerprint) const
-{
-    QByteArray buffer;
-    QDataStream stream(&buffer, QIODevice::WriteOnly);
-
-    // encode STUN header
-    quint16 length = 0;
-    stream << m_type;
-    stream << length;
-    stream << m_cookie;
-    stream.writeRawData(m_id.data(), m_id.size());
-
-    // MAPPED-ADDRESS
-    addAddress(stream, MappedAddress, mappedHost, mappedPort);
-
-    // CHANGE-REQUEST
-    if (m_attributes.contains(ChangeRequest)) {
-        stream << quint16(ChangeRequest);
-        stream << quint16(sizeof(m_changeRequest));
-        stream << m_changeRequest;
-    }
-
-    // SOURCE-ADDRESS
-    addAddress(stream, SourceAddress, sourceHost, sourcePort);
-
-    // CHANGED-ADDRESS
-    addAddress(stream, ChangedAddress, changedHost, changedPort);
-
-    // OTHER-ADDRESS
-    addAddress(stream, OtherAddress, otherHost, otherPort);
-
-    // XOR-MAPPED-ADDRESS
-    addAddress(stream, XorMappedAddress, xorMappedHost, xorMappedPort, m_id);
-
-    // XOR-PEER-ADDRESS
-    addAddress(stream, XorPeerAddress, xorPeerHost, xorPeerPort, m_id);
-
-    // XOR-RELAYED-ADDRESS
-    addAddress(stream, XorRelayedAddress, xorRelayedHost, xorRelayedPort, m_id);
-
-    // ERROR-CODE
-    if (errorCode)
-    {
-        const quint16 reserved = 0;
-        const quint8 errorCodeHigh = errorCode / 100;
-        const quint8 errorCodeLow = errorCode % 100;
-        const QByteArray phrase = errorPhrase.toUtf8();
-        stream << quint16(ErrorCode);
-        stream << quint16(phrase.size() + 4);
-        stream << reserved;
-        stream << errorCodeHigh;
-        stream << errorCodeLow;
-        stream.writeRawData(phrase.data(), phrase.size());
-        if (phrase.size() % 4)
-        {
-            const QByteArray padding(4 - (phrase.size() %  4), 0);
-            stream.writeRawData(padding.data(), padding.size());
-        }
-    }
-
-    // PRIORITY
-    if (m_attributes.contains(Priority))
-    {
-        stream << quint16(Priority);
-        stream << quint16(sizeof(m_priority));
-        stream << m_priority;
-    }
-
-    // USE-CANDIDATE
-    if (useCandidate)
-    {
-        stream << quint16(UseCandidate);
-        stream << quint16(0);
-    }
-
-    // CHANNEL-NUMBER
-    if (m_attributes.contains(ChannelNumber)) {
-        stream << quint16(ChannelNumber);
-        stream << quint16(4);
-        stream << m_channelNumber;
-        stream << quint16(0);
-    }
-
-    // DATA
-    if (m_attributes.contains(DataAttr)) {
-        stream << quint16(DataAttr);
-        stream << quint16(m_data.size());
-        stream.writeRawData(m_data.data(), m_data.size());
-        if (m_data.size() % 4) {
-            const QByteArray padding(4 - (m_data.size() %  4), 0);
-            stream.writeRawData(padding.data(), padding.size());
-        }
-    }
-
-    // LIFETIME
-    if (m_attributes.contains(Lifetime)) {
-        stream << quint16(Lifetime);
-        stream << quint16(sizeof(m_lifetime));
-        stream << m_lifetime;
-    }
-
-    // NONCE
-    if (m_attributes.contains(Nonce)) {
-        stream << quint16(Nonce);
-        stream << quint16(m_nonce.size());
-        stream.writeRawData(m_nonce.data(), m_nonce.size());
-    }
-
-    // REALM
-    if (m_attributes.contains(Realm))
-        encodeString(stream, Realm, m_realm);
-
-    // REQUESTED-TRANSPORT
-    if (m_attributes.contains(RequestedTransport)) {
-        const QByteArray reserved(3, 0);
-        stream << quint16(RequestedTransport);
-        stream << quint16(4);
-        stream << m_requestedTransport;
-        stream.writeRawData(reserved.data(), reserved.size());
-    }
-
-    // RESERVATION-TOKEN
-    if (m_attributes.contains(ReservationToken)) {
-        stream << quint16(ReservationToken);
-        stream << quint16(m_reservationToken.size());
-        stream.writeRawData(m_reservationToken.data(), m_reservationToken.size());
-    }
-
-    // SOFTWARE
-    if (m_attributes.contains(Software))
-        encodeString(stream, Software, m_software);
-
-    // USERNAME
-    if (m_attributes.contains(Username))
-        encodeString(stream, Username, m_username);
-
-    // ICE-CONTROLLING or ICE-CONTROLLED
-    if (!iceControlling.isEmpty())
-    {
-        stream << quint16(IceControlling);
-        stream << quint16(iceControlling.size());
-        stream.writeRawData(iceControlling.data(), iceControlling.size());
-    } else if (!iceControlled.isEmpty()) {
-        stream << quint16(IceControlled);
-        stream << quint16(iceControlled.size());
-        stream.writeRawData(iceControlled.data(), iceControlled.size());
-    }
-
-    // set body length
-    setBodyLength(buffer, buffer.size() - STUN_HEADER);
-
-    // MESSAGE-INTEGRITY
-    if (!key.isEmpty())
-    {
-        setBodyLength(buffer, buffer.size() - STUN_HEADER + 24);
-        QByteArray integrity = generateHmacSha1(key, buffer);
-        stream << quint16(MessageIntegrity);
-        stream << quint16(integrity.size());
-        stream.writeRawData(integrity.data(), integrity.size());
-    }
-
-    // FINGERPRINT
-    if (addFingerprint)
-    {
-        setBodyLength(buffer, buffer.size() - STUN_HEADER + 8);
-        quint32 fingerprint = generateCrc32(buffer) ^ 0x5354554eL;
-        stream << quint16(Fingerprint);
-        stream << quint16(sizeof(fingerprint));
-        stream << fingerprint;
-    }
-
-    return buffer;
-}
-
-/// If the given packet looks like a STUN message, returns the message
-/// type, otherwise returns 0.
-///
-/// \param buffer
-/// \param cookie
-/// \param id
-
-quint16 QXmppStunMessage::peekType(const QByteArray &buffer, quint32 &cookie, QByteArray &id)
-{
-    if (buffer.size() < STUN_HEADER)
-        return 0;
-
-    // parse STUN header
-    QDataStream stream(buffer);
-    quint16 type;
-    quint16 length;
-    stream >> type;
-    stream >> length;
-    stream >> cookie;
-
-    if (length != buffer.size() - STUN_HEADER)
-        return 0;
-
-    id.resize(ID_SIZE);
-    stream.readRawData(id.data(), id.size());
-    return type;
-}
-
-QString QXmppStunMessage::toString() const
-{
-    QStringList dumpLines;
-    QString typeName;
-    switch (messageMethod())
-    {
-        case Binding: typeName = "Binding"; break;
-        case SharedSecret: typeName = "Shared Secret"; break;
-        case Allocate: typeName = "Allocate"; break;
-        case Refresh: typeName = "Refresh"; break;
-        case Send: typeName = "Send"; break;
-        case Data: typeName = "Data"; break;
-        case CreatePermission: typeName = "CreatePermission"; break;
-        case ChannelBind: typeName = "ChannelBind"; break;
-        default: typeName = "Unknown"; break;
-    }
-    switch (messageClass())
-    {
-        case Request: typeName += " Request"; break;
-        case Indication: typeName += " Indication"; break;
-        case Response: typeName += " Response"; break;
-        case Error: typeName += " Error"; break;
-        default: break;
-    }
-    dumpLines << QString(" type %1 (%2)")
-        .arg(typeName)
-        .arg(QString::number(m_type));
-    dumpLines << QString(" id %1").arg(QString::fromAscii(m_id.toHex()));
-
-    // attributes
-    if (m_attributes.contains(ChannelNumber))
-        dumpLines << QString(" * CHANNEL-NUMBER %1").arg(QString::number(m_channelNumber));
-    if (errorCode)
-        dumpLines << QString(" * ERROR-CODE %1 %2")
-            .arg(QString::number(errorCode), errorPhrase);
-    if (m_attributes.contains(Lifetime))
-        dumpLines << QString(" * LIFETIME %1").arg(QString::number(m_lifetime));
-    if (m_attributes.contains(Nonce))
-        dumpLines << QString(" * NONCE %1").arg(QString::fromLatin1(m_nonce));
-    if (m_attributes.contains(Realm))
-        dumpLines << QString(" * REALM %1").arg(m_realm);
-    if (m_attributes.contains(RequestedTransport))
-        dumpLines << QString(" * REQUESTED-TRANSPORT 0x%1").arg(QString::number(m_requestedTransport, 16));
-    if (m_attributes.contains(ReservationToken))
-        dumpLines << QString(" * RESERVATION-TOKEN %1").arg(QString::fromAscii(m_reservationToken.toHex()));
-    if (m_attributes.contains(Software))
-        dumpLines << QString(" * SOFTWARE %1").arg(m_software);
-    if (m_attributes.contains(Username))
-        dumpLines << QString(" * USERNAME %1").arg(m_username);
-    if (mappedPort)
-        dumpLines << QString(" * MAPPED-ADDRESS %1 %2")
-            .arg(mappedHost.toString(), QString::number(mappedPort));
-    if (m_attributes.contains(ChangeRequest))
-        dumpLines << QString(" * CHANGE-REQUEST %1")
-            .arg(QString::number(m_changeRequest));
-    if (sourcePort)
-        dumpLines << QString(" * SOURCE-ADDRESS %1 %2")
-            .arg(sourceHost.toString(), QString::number(sourcePort));
-    if (changedPort)
-        dumpLines << QString(" * CHANGED-ADDRESS %1 %2")
-            .arg(changedHost.toString(), QString::number(changedPort));
-    if (otherPort)
-        dumpLines << QString(" * OTHER-ADDRESS %1 %2")
-            .arg(otherHost.toString(), QString::number(otherPort));
-    if (xorMappedPort)
-        dumpLines << QString(" * XOR-MAPPED-ADDRESS %1 %2")
-            .arg(xorMappedHost.toString(), QString::number(xorMappedPort));
-    if (xorPeerPort)
-        dumpLines << QString(" * XOR-PEER-ADDRESS %1 %2")
-            .arg(xorPeerHost.toString(), QString::number(xorPeerPort));
-    if (xorRelayedPort)
-        dumpLines << QString(" * XOR-RELAYED-ADDRESS %1 %2")
-            .arg(xorRelayedHost.toString(), QString::number(xorRelayedPort));
-    if (m_attributes.contains(Priority))
-        dumpLines << QString(" * PRIORITY %1").arg(QString::number(m_priority));
-    if (!iceControlling.isEmpty())
-        dumpLines << QString(" * ICE-CONTROLLING %1")
-            .arg(QString::fromAscii(iceControlling.toHex()));
-    if (!iceControlled.isEmpty())
-        dumpLines << QString(" * ICE-CONTROLLED %1")
-            .arg(QString::fromAscii(iceControlled.toHex()));
-
-    return dumpLines.join("\n");
-}
-
-/// Constructs a new QXmppStunTransaction.
-///
-/// \param request
-/// \param receiver
-
-QXmppStunTransaction::QXmppStunTransaction(const QXmppStunMessage &request, QObject *receiver)
-    : QXmppLoggable(receiver),
-    m_request(request),
-    m_tries(0)
-{
-    bool check;
-    Q_UNUSED(check);
-
-    check = connect(this, SIGNAL(writeStun(QXmppStunMessage)),
-                    receiver, SLOT(writeStun(QXmppStunMessage)));
-    Q_ASSERT(check);
-
-    check = connect(this, SIGNAL(finished()),
-                    receiver, SLOT(transactionFinished()));
-    Q_ASSERT(check);
-
-    // RTO timer
-    m_retryTimer = new QTimer(this);
-    m_retryTimer->setSingleShot(true);
-    check = connect(m_retryTimer, SIGNAL(timeout()),
-                    this, SLOT(retry()));
-
-    // send packet immediately
-    m_tries++;
-    emit writeStun(m_request);
-    m_retryTimer->start(STUN_RTO_INTERVAL);
-}
-
-void QXmppStunTransaction::readStun(const QXmppStunMessage &response)
-{
-    if (response.messageClass() == QXmppStunMessage::Error ||
-        response.messageClass() == QXmppStunMessage::Response) {
-        m_response = response;
-        emit finished();
-    }
-}
-
-/// Returns the STUN request.
-
-QXmppStunMessage QXmppStunTransaction::request() const
-{
-    return m_request;
-}
-
-/// Returns the STUN response.
-
-QXmppStunMessage QXmppStunTransaction::response() const
-{
-    return m_response;
-}
-
-void QXmppStunTransaction::retry()
-{
-    if (m_tries >= STUN_RTO_MAX) {
-        m_response.setType(QXmppStunMessage::Error);
-        m_response.errorPhrase = QLatin1String("Request timed out");
-        emit finished();
-        return;
-    }
-
-    // resend request
-    m_tries++;
-    emit writeStun(m_request);
-    m_retryTimer->start(2 * m_retryTimer->interval());
-}
-
-/// Constructs a new QXmppTurnAllocation.
-///
-/// \param parent
-
-QXmppTurnAllocation::QXmppTurnAllocation(QObject *parent)
-    : QXmppLoggable(parent),
-    m_relayedPort(0),
-    m_turnPort(0),
-    m_channelNumber(0x4000),
-    m_lifetime(600),
-    m_state(UnconnectedState)
-{
-    bool check;
-    Q_UNUSED(check);
-
-    socket = new QUdpSocket(this);
-    check = connect(socket, SIGNAL(readyRead()),
-                    this, SLOT(readyRead()));
-    Q_ASSERT(check);
-
-    m_timer = new QTimer(this);
-    m_timer->setSingleShot(true);
-    check = connect(m_timer, SIGNAL(timeout()),
-                    this, SLOT(refresh()));
-    Q_ASSERT(check);
-
-    // channels are valid 600s, we refresh every 500s
-    m_channelTimer = new QTimer(this);
-    m_channelTimer->setInterval(500 * 1000);
-    check = connect(m_channelTimer, SIGNAL(timeout()),
-                    this, SLOT(refreshChannels()));
-    Q_ASSERT(check);
-}
-
-/// Destroys the TURN allocation.
-
-QXmppTurnAllocation::~QXmppTurnAllocation()
-{
-    if (m_state == ConnectedState)
-        disconnectFromHost();
-}
-
-/// Allocates the TURN allocation.
-
-void QXmppTurnAllocation::connectToHost()
-{
-    if (m_state != UnconnectedState)
-        return;
-
-    // start listening for UDP
-    if (socket->state() == QAbstractSocket::UnconnectedState) {
-        if (!socket->bind()) {
-            warning("Could not start listening for TURN");
-            return;
-        }
-    }
-
-    // send allocate request
-    QXmppStunMessage request;
-    request.setType(QXmppStunMessage::Allocate | QXmppStunMessage::Request);
-    request.setId(generateRandomBytes(12));
-    request.setLifetime(m_lifetime);
-    request.setRequestedTransport(0x11);
-    m_transactions << new QXmppStunTransaction(request, this);
-
-    // update state
-    setState(ConnectingState);
-}
-
-/// Releases the TURN allocation.
-
-void QXmppTurnAllocation::disconnectFromHost()
-{
-    m_channelTimer->stop();
-    m_timer->stop();
-
-    // clear channels and any outstanding transactions
-    m_channels.clear();
-    foreach (QXmppStunTransaction *transaction, m_transactions)
-        delete transaction;
-    m_transactions.clear();
-
-    // end allocation
-    if (m_state == ConnectedState) {
-        QXmppStunMessage request;
-        request.setType(QXmppStunMessage::Refresh | QXmppStunMessage::Request);
-        request.setId(generateRandomBytes(12));
-        request.setNonce(m_nonce);
-        request.setRealm(m_realm);
-        request.setUsername(m_username);
-        request.setLifetime(0);
-        m_transactions << new QXmppStunTransaction(request, this);
-
-        setState(ClosingState);
-    } else {
-        setState(UnconnectedState);
-    }
-}
-
-void QXmppTurnAllocation::readyRead()
-{
-    QByteArray buffer;
-    QHostAddress remoteHost;
-    quint16 remotePort;
-    while (socket->hasPendingDatagrams()) {
-        const qint64 size = socket->pendingDatagramSize();
-        buffer.resize(size);
-        socket->readDatagram(buffer.data(), buffer.size(), &remoteHost, &remotePort);
-        handleDatagram(buffer, remoteHost, remotePort);
-    }
-}
-
-void QXmppTurnAllocation::handleDatagram(const QByteArray &buffer, const QHostAddress &remoteHost, quint16 remotePort)
-{
-    // demultiplex channel data
-    if (buffer.size() >= 4 && (buffer[0] & 0xc0) == 0x40) {
-        QDataStream stream(buffer);
-        quint16 channel, length;
-        stream >> channel;
-        stream >> length;
-        if (m_state == ConnectedState && m_channels.contains(channel) && length <= buffer.size() - 4) {
-            emit datagramReceived(buffer.mid(4, length), m_channels[channel].first,
-                m_channels[channel].second);
-        }
-        return;
-    }
-
-    // parse STUN message
-    QXmppStunMessage message;
-    QStringList errors;
-    if (!message.decode(buffer, QByteArray(), &errors)) {
-        foreach (const QString &error, errors)
-            warning(error);
-        return;
-    }
-
-#ifdef QXMPP_DEBUG_STUN
-    logReceived(QString("TURN packet from %1 port %2\n%3").arg(
-            remoteHost.toString(),
-            QString::number(remotePort),
-            message.toString()));
-#endif
-
-    // find transaction
-    foreach (QXmppStunTransaction *transaction, m_transactions) {
-        if (transaction->request().id() == message.id() &&
-            transaction->request().messageMethod() == message.messageMethod()) {
-            transaction->readStun(message);
-            return;
-        }
-    }
-}
-
-/// Refresh allocation.
-
-void QXmppTurnAllocation::refresh()
-{
-    QXmppStunMessage request;
-    request.setType(QXmppStunMessage::Refresh | QXmppStunMessage::Request);
-    request.setId(generateRandomBytes(12));
-    request.setNonce(m_nonce);
-    request.setRealm(m_realm);
-    request.setUsername(m_username);
-    m_transactions << new QXmppStunTransaction(request, this);
-}
-
-/// Refresh channel bindings.
-
-void QXmppTurnAllocation::refreshChannels()
-{
-    foreach (quint16 channel, m_channels.keys()) {
-        QXmppStunMessage request;
-        request.setType(QXmppStunMessage::ChannelBind | QXmppStunMessage::Request);
-        request.setId(generateRandomBytes(12));
-        request.setNonce(m_nonce);
-        request.setRealm(m_realm);
-        request.setUsername(m_username);
-        request.setChannelNumber(channel);
-        request.xorPeerHost = m_channels[channel].first;
-        request.xorPeerPort = m_channels[channel].second;
-        m_transactions << new QXmppStunTransaction(request, this);
-    }
-}
-
-/// Returns the relayed host address, i.e. the address on the server
-/// used to communicate with peers.
-
-QHostAddress QXmppTurnAllocation::relayedHost() const
-{
-    return m_relayedHost;
-}
-
-/// Returns the relayed port, i.e. the port on the server used to communicate
-/// with peers.
-
-quint16 QXmppTurnAllocation::relayedPort() const
-{
-    return m_relayedPort;
-}
-
-/// Sets the password used to authenticate with the TURN server.
-///
-/// \param password
-
-void QXmppTurnAllocation::setPassword(const QString &password)
-{
-    m_password = password;
-}
-
-/// Sets the TURN server to use.
-///
-/// \param host The address of the TURN server.
-/// \param port The port of the TURN server.
-
-void QXmppTurnAllocation::setServer(const QHostAddress &host, quint16 port)
-{
-    m_turnHost = host;
-    m_turnPort = port;
-}
-
-/// Sets the \a user used for authentication with the TURN server.
-///
-/// \param user
-
-void QXmppTurnAllocation::setUser(const QString &user)
-{
-    m_username = user;
-}
-
-/// Returns the current state of the allocation.
-///
-
-QXmppTurnAllocation::AllocationState QXmppTurnAllocation::state() const
-{
-    return m_state;
-}
-
-void QXmppTurnAllocation::setState(AllocationState state)
-{
-    if (state == m_state)
-        return;
-    m_state = state;
-    if (m_state == ConnectedState) {
-        emit connected();
-    } else if (m_state == UnconnectedState) {
-        m_timer->stop();
-        emit disconnected();
-    }
-}
-
-void QXmppTurnAllocation::transactionFinished()
-{
-    QXmppStunTransaction *transaction = qobject_cast<QXmppStunTransaction*>(sender());
-    if (!transaction || !m_transactions.removeAll(transaction))
-        return;
-    transaction->deleteLater();
-
-    // handle authentication
-    const QXmppStunMessage reply = transaction->response();
-    if (reply.messageClass() == QXmppStunMessage::Error &&
-        reply.errorCode == 401 &&
-        (reply.nonce() != m_nonce && reply.realm() != m_realm))
-    {
-        // update long-term credentials
-        m_nonce = reply.nonce();
-        m_realm = reply.realm();
-        QCryptographicHash hash(QCryptographicHash::Md5);
-        hash.addData((m_username + ":" + m_realm + ":" + m_password).toUtf8());
-        m_key = hash.result();
-
-        // retry request
-        QXmppStunMessage request(transaction->request());
-        request.setId(generateRandomBytes(12));
-        request.setNonce(m_nonce);
-        request.setRealm(m_realm);
-        request.setUsername(m_username);
-        m_transactions << new QXmppStunTransaction(request, this);
-        return;
-    }
-
-    const quint16 method = transaction->request().messageMethod();
-    if (method == QXmppStunMessage::Allocate) {
-
-        if (reply.messageClass() == QXmppStunMessage::Error) {
-            warning(QString("Allocation failed: %1 %2").arg(
-                QString::number(reply.errorCode), reply.errorPhrase));
-            setState(UnconnectedState);
-            return;
-        }
-        if (reply.xorRelayedHost.isNull() ||
-            reply.xorRelayedHost.protocol() != QAbstractSocket::IPv4Protocol ||
-            !reply.xorRelayedPort) {
-            warning("Allocation did not yield a valid relayed address");
-            setState(UnconnectedState);
-            return;
-        }
-
-        // store relayed address
-        m_relayedHost = reply.xorRelayedHost;
-        m_relayedPort = reply.xorRelayedPort;
-
-        // schedule refresh
-        m_lifetime = reply.lifetime();
-        m_timer->start((m_lifetime - 60) * 1000);
-
-        setState(ConnectedState);
-
-    } else if (method == QXmppStunMessage::ChannelBind) {
-
-        if (reply.messageClass() == QXmppStunMessage::Error) {
-            warning(QString("ChannelBind failed: %1 %2").arg(
-                QString::number(reply.errorCode), reply.errorPhrase));
-
-            // remove channel
-            m_channels.remove(transaction->request().channelNumber());
-            if (m_channels.isEmpty())
-                m_channelTimer->stop();
-            return;
-        }
-
-    } else if (method == QXmppStunMessage::Refresh) {
-
-        if (reply.messageClass() == QXmppStunMessage::Error) {
-            warning(QString("Refresh failed: %1 %2").arg(
-                QString::number(reply.errorCode), reply.errorPhrase));
-            setState(UnconnectedState);
-            return;
-        }
-
-        if (m_state == ClosingState) {
-            setState(UnconnectedState);
-            return;
-        }
-
-        // schedule refresh
-        m_lifetime = reply.lifetime();
-        m_timer->start((m_lifetime - 60) * 1000);
-
-    }
-}
-
-qint64 QXmppTurnAllocation::writeDatagram(const QByteArray &data, const QHostAddress &host, quint16 port)
-{
-    if (m_state != ConnectedState)
-        return -1;
-
-    const Address addr = qMakePair(host, port);
-    quint16 channel = m_channels.key(addr);
-
-    if (!channel) {
-        channel = m_channelNumber++;
-        m_channels.insert(channel, addr);
-
-        // bind channel
-        QXmppStunMessage request;
-        request.setType(QXmppStunMessage::ChannelBind | QXmppStunMessage::Request);
-        request.setId(generateRandomBytes(12));
-        request.setNonce(m_nonce);
-        request.setRealm(m_realm);
-        request.setUsername(m_username);
-        request.setChannelNumber(channel);
-        request.xorPeerHost = host;
-        request.xorPeerPort = port;
-        m_transactions << new QXmppStunTransaction(request, this);
-
-        // schedule refresh
-        if (!m_channelTimer->isActive())
-            m_channelTimer->start();
-    }
-
-    // send data
-    QByteArray channelData;
-    channelData.reserve(4 + data.size());
-    QDataStream stream(&channelData, QIODevice::WriteOnly);
-    stream << channel;
-    stream << quint16(data.size());
-    stream.writeRawData(data.data(), data.size());
-    if (socket->writeDatagram(channelData, m_turnHost, m_turnPort) == channelData.size())
-        return data.size();
-    else
-        return -1;
-}
-
-void QXmppTurnAllocation::writeStun(const QXmppStunMessage &message)
-{
-    socket->writeDatagram(message.encode(m_key), m_turnHost, m_turnPort);
-#ifdef QXMPP_DEBUG_STUN
-    logSent(QString("TURN packet to %1 port %2\n%3").arg(
-            m_turnHost.toString(),
-            QString::number(m_turnPort),
-            message.toString()));
-#endif
-}
-
-QXmppIceComponent::Pair::Pair(int component, bool controlling)
-    : checked(QIODevice::NotOpen),
-    socket(0),
-    m_component(component),
-    m_controlling(controlling)
-{
-    transaction = generateRandomBytes(ID_SIZE);
-}
-
-quint64 QXmppIceComponent::Pair::priority() const
-{
-    QXmppJingleCandidate local;
-    local.setComponent(m_component);
-    local.setType(socket ? QXmppJingleCandidate::HostType : QXmppJingleCandidate::RelayedType);
-    local.setPriority(candidatePriority(local));
-
-    // see RFC 5245 - 5.7.2. Computing Pair Priority and Ordering Pairs
-    const quint32 G = m_controlling ? local.priority() : remote.priority();
-    const quint32 D = m_controlling ? remote.priority() : local.priority();
-    return (quint64(1) << 32) * qMin(G, D) + 2 * qMax(G, D) + (G > D ? 1 : 0);
-}
-
-QString QXmppIceComponent::Pair::toString() const
-{
-    QString str = QString("%1 port %2").arg(remote.host().toString(), QString::number(remote.port()));
-    if (socket)
-        str += QString(" (local %1 port %2)").arg(socket->localAddress().toString(), QString::number(socket->localPort()));
-    else
-        str += QString(" (relayed)");
-    if (!reflexive.host().isNull() && reflexive.port())
-        str += QString(" (reflexive %1 port %2)").arg(reflexive.host().toString(), QString::number(reflexive.port()));
-    return str;
-}
-
-/// Constructs a new QXmppIceComponent.
-///
-/// \param controlling
-/// \param parent
-
-QXmppIceComponent::QXmppIceComponent(QObject *parent)
-    : QXmppLoggable(parent),
-    m_component(0),
-    m_activePair(0),
-    m_fallbackPair(0),
-    m_iceControlling(false),
-    m_peerReflexivePriority(0),
-    m_stunPort(0),
-    m_stunTries(0),
-    m_turnConfigured(false)
-{
-    bool check;
-    Q_UNUSED(check);
-
-    m_localUser = generateStanzaHash(4);
-    m_localPassword = generateStanzaHash(22);
-
-    m_timer = new QTimer(this);
-    m_timer->setInterval(500);
-    check = connect(m_timer, SIGNAL(timeout()),
-                    this, SLOT(checkCandidates()));
-    Q_ASSERT(check);
-
-    m_stunTimer = new QTimer(this);
-    m_stunTimer->setInterval(500);
-    check = connect(m_stunTimer, SIGNAL(timeout()),
-                    this, SLOT(checkStun()));
-    Q_ASSERT(check);
-
-    m_turnAllocation = new QXmppTurnAllocation(this);
-    check = connect(m_turnAllocation, SIGNAL(connected()),
-                    this, SLOT(turnConnected()));
-    Q_ASSERT(check);
-    check = connect(m_turnAllocation, SIGNAL(datagramReceived(QByteArray,QHostAddress,quint16)),
-                    this, SLOT(handleDatagram(QByteArray,QHostAddress,quint16)));
-    Q_ASSERT(check);
-}
-
-/// Destroys the QXmppIceComponent.
-
-QXmppIceComponent::~QXmppIceComponent()
-{
-    foreach (Pair *pair, m_pairs)
-        delete pair;
-}
-
-/// Returns the component id for the current socket, e.g. 1 for RTP
-/// and 2 for RTCP.
-
-int QXmppIceComponent::component() const
-{
-    return m_component;
-}
-
-/// Sets the component id for the current socket, e.g. 1 for RTP
-/// and 2 for RTCP.
-///
-/// \param component
-
-void QXmppIceComponent::setComponent(int component)
-{
-    m_component = component;
-
-    // calculate peer-reflexive candidate priority
-    // see RFC 5245 -  7.1.2.1. PRIORITY and USE-CANDIDATE
-    QXmppJingleCandidate reflexive;
-    reflexive.setComponent(m_component);
-    reflexive.setType(QXmppJingleCandidate::PeerReflexiveType);
-    m_peerReflexivePriority = candidatePriority(reflexive);
-
-    setObjectName(QString("STUN(%1)").arg(QString::number(m_component)));
-}
-
-void QXmppIceComponent::checkCandidates()
-{
-    debug("Checking remote candidates");
-    foreach (Pair *pair, m_pairs)
-    {
-        if (m_remoteUser.isEmpty())
-            continue;
-
-        // send a binding request
-        QXmppStunMessage message;
-        message.setId(pair->transaction);
-        message.setType(QXmppStunMessage::Binding | QXmppStunMessage::Request);
-        message.setPriority(m_peerReflexivePriority);
-        message.setUsername(QString("%1:%2").arg(m_remoteUser, m_localUser));
-        if (m_iceControlling)
-        {
-            message.iceControlling = QByteArray(8, 0);
-            message.useCandidate = true;
-        } else {
-            message.iceControlled = QByteArray(8, 0);
-        }
-        writeStun(message, pair);
-    }
-
-}
-
-void QXmppIceComponent::checkStun()
-{
-    if (m_stunHost.isNull() || !m_stunPort || m_stunTries > 10) {
-        m_stunTimer->stop();
-        return;
-    }
-
-    // Send a request to STUN server to determine server-reflexive candidate
-    foreach (QUdpSocket *socket, m_sockets)
-    {
-        QXmppStunMessage msg;
-        msg.setType(QXmppStunMessage::Binding | QXmppStunMessage::Request);
-        msg.setId(m_stunId);
-#ifdef QXMPP_DEBUG_STUN
-        logSent(QString("STUN packet to %1 port %2\n%3").arg(m_stunHost.toString(),
-                QString::number(m_stunPort), msg.toString()));
-#endif
-        socket->writeDatagram(msg.encode(), m_stunHost, m_stunPort);
-    }
-    m_stunTries++;
-}
-
-/// Stops ICE connectivity checks and closes the underlying sockets.
-
-void QXmppIceComponent::close()
-{
-    foreach (QUdpSocket *socket, m_sockets)
-        socket->close();
-    m_turnAllocation->disconnectFromHost();
-    m_timer->stop();
-    m_stunTimer->stop();
-    m_activePair = 0;
-}
-
-/// Starts ICE connectivity checks.
-
-void QXmppIceComponent::connectToHost()
-{
-    if (m_activePair)
-        return;
-
-    checkCandidates();
-    m_timer->start();
-}
-
-/// Returns true if ICE negotiation completed, false otherwise.
-
-bool QXmppIceComponent::isConnected() const
-{
-    return m_activePair != 0;
-}
-
-void QXmppIceComponent::setIceControlling(bool controlling)
-{
-    m_iceControlling = controlling;
-}
-
-/// Returns the list of local candidates.
-
-QList<QXmppJingleCandidate> QXmppIceComponent::localCandidates() const
-{
-    return m_localCandidates;
-}
-
-/// Sets the local user fragment.
-///
-/// \param user
-
-void QXmppIceComponent::setLocalUser(const QString &user)
-{
-    m_localUser = user;
-}
-
-/// Sets the local password.
-///
-/// \param password
-
-void QXmppIceComponent::setLocalPassword(const QString &password)
-{
-    m_localPassword = password;
-}
-
-/// Adds a remote STUN candidate.
-
-bool QXmppIceComponent::addRemoteCandidate(const QXmppJingleCandidate &candidate)
-{
-    if (candidate.component() != m_component ||
-        (candidate.type() != QXmppJingleCandidate::HostType &&
-         candidate.type() != QXmppJingleCandidate::RelayedType &&
-         candidate.type() != QXmppJingleCandidate::ServerReflexiveType) ||
-        candidate.protocol() != "udp" ||
-        (candidate.host().protocol() != QAbstractSocket::IPv4Protocol &&
-        candidate.host().protocol() != QAbstractSocket::IPv6Protocol))
-        return false;
-
-    foreach (Pair *pair, m_pairs)
-        if (pair->remote.host() == candidate.host() &&
-            pair->remote.port() == candidate.port())
-            return false;
-
-    foreach (QUdpSocket *socket, m_sockets)
-    {
-        // do not pair IPv4 with IPv6 or global with link-local addresses
-        if (socket->localAddress().protocol() != candidate.host().protocol() ||
-            isIPv6LinkLocalAddress(socket->localAddress()) != isIPv6LinkLocalAddress(candidate.host()))
-            continue;
-
-        Pair *pair = new Pair(m_component, m_iceControlling);
-        pair->remote = candidate;
-        if (isIPv6LinkLocalAddress(pair->remote.host()))
-        {
-            QHostAddress remoteHost = pair->remote.host();
-            remoteHost.setScopeId(socket->localAddress().scopeId());
-            pair->remote.setHost(remoteHost);
-        }
-        pair->socket = socket;
-        m_pairs << pair;
-
-        if (!m_fallbackPair)
-            m_fallbackPair = pair;
-    }
-
-    // only use relaying for IPv4 candidates
-    if (m_turnConfigured && candidate.host().protocol() == QAbstractSocket::IPv4Protocol) {
-        Pair *pair = new Pair(m_component, m_iceControlling);
-        pair->remote = candidate;
-        pair->socket = 0;
-        m_pairs << pair;
-    }
-    return true;
-}
-
-/// Adds a discovered peer-reflexive STUN candidate.
-
-QXmppIceComponent::Pair *QXmppIceComponent::addRemoteCandidate(QUdpSocket *socket, const QHostAddress &host, quint16 port, quint32 priority)
-{
-    foreach (Pair *pair, m_pairs)
-        if (pair->remote.host() == host &&
-            pair->remote.port() == port &&
-            pair->socket == socket)
-            return pair;
-
-    QXmppJingleCandidate candidate;
-    candidate.setComponent(m_component);
-    candidate.setHost(host);
-    candidate.setId(generateStanzaHash(10));
-    candidate.setPort(port);
-    candidate.setPriority(priority);
-    candidate.setProtocol("udp");
-    candidate.setType(QXmppJingleCandidate::PeerReflexiveType);
-
-    Pair *pair = new Pair(m_component, m_iceControlling);
-    pair->remote = candidate;
-    pair->socket = socket;
-    m_pairs << pair;
-
-    debug(QString("Added candidate %1").arg(pair->toString()));
-    return pair;
-}
-
-/// Sets the remote user fragment.
-///
-/// \param user
-
-void QXmppIceComponent::setRemoteUser(const QString &user)
-{
-    m_remoteUser = user;
-}
-
-/// Sets the remote password.
-///
-/// \param password
-
-void QXmppIceComponent::setRemotePassword(const QString &password)
-{
-    m_remotePassword = password;
-}
-
-/// Sets the list of sockets to use for this component.
-///
-/// \param sockets
-
-void QXmppIceComponent::setSockets(QList<QUdpSocket*> sockets)
-{
-    // clear previous candidates and sockets
-    m_localCandidates.clear();
-    foreach (QUdpSocket *socket, m_sockets)
-        delete socket;
-    m_sockets.clear();
-
-    // store candidates
-    int foundation = 0;
-    foreach (QUdpSocket *socket, sockets)
-    {
-        socket->setParent(this);
-        connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
-
-        QXmppJingleCandidate candidate;
-        candidate.setComponent(m_component);
-        candidate.setFoundation(foundation++);
-        // remove scope ID from IPv6 non-link local addresses
-        QHostAddress addr(socket->localAddress());
-        if (addr.protocol() == QAbstractSocket::IPv6Protocol &&
-            !isIPv6LinkLocalAddress(addr)) {
-            addr.setScopeId(QString());
-        }
-        candidate.setHost(addr);
-        candidate.setId(generateStanzaHash(10));
-        candidate.setPort(socket->localPort());
-        candidate.setProtocol("udp");
-        candidate.setType(QXmppJingleCandidate::HostType);
-        candidate.setPriority(candidatePriority(candidate));
-
-        m_sockets << socket;
-        m_localCandidates << candidate;
-    }
-
-    // start STUN checks
-    if (!m_stunHost.isNull() && m_stunPort) {
-        m_stunTries = 0;
-        checkStun();
-        m_stunTimer->start();
-    }
-
-    // connect to TURN server
-    if (m_turnConfigured)
-        m_turnAllocation->connectToHost();
-}
-
-/// Sets the STUN server to use to determine server-reflexive addresses
-/// and ports.
-///
-/// \param host The address of the STUN server.
-/// \param port The port of the STUN server.
-
-void QXmppIceComponent::setStunServer(const QHostAddress &host, quint16 port)
-{
-    m_stunHost = host;
-    m_stunPort = port;
-    m_stunId = generateRandomBytes(ID_SIZE);
-}
-
-/// Sets the TURN server to use to relay packets in double-NAT configurations.
-///
-/// \param host The address of the TURN server.
-/// \param port The port of the TURN server.
-
-void QXmppIceComponent::setTurnServer(const QHostAddress &host, quint16 port)
-{
-    m_turnAllocation->setServer(host, port);
-    m_turnConfigured = !host.isNull() && port;
-}
-
-/// Sets the \a user used for authentication with the TURN server.
-///
-/// \param user
-
-void QXmppIceComponent::setTurnUser(const QString &user)
-{
-    m_turnAllocation->setUser(user);
-}
-
-/// Sets the \a password used for authentication with the TURN server.
-///
-/// \param password
-
-void QXmppIceComponent::setTurnPassword(const QString &password)
-{
-    m_turnAllocation->setPassword(password);
-}
-
-void QXmppIceComponent::readyRead()
-{
-    QUdpSocket *socket = qobject_cast<QUdpSocket*>(sender());
-    if (!socket)
-        return;
-
-    QByteArray buffer;
-    QHostAddress remoteHost;
-    quint16 remotePort;
-    while (socket->hasPendingDatagrams()) {
-        const qint64 size = socket->pendingDatagramSize();
-        buffer.resize(size);
-        socket->readDatagram(buffer.data(), buffer.size(), &remoteHost, &remotePort);
-        handleDatagram(buffer, remoteHost, remotePort, socket);
-    }
-}
-
-void QXmppIceComponent::handleDatagram(const QByteArray &buffer, const QHostAddress &remoteHost, quint16 remotePort, QUdpSocket *socket)
-{
-    // if this is not a STUN message, emit it
-    quint32 messageCookie;
-    QByteArray messageId;
-    quint16 messageType = QXmppStunMessage::peekType(buffer, messageCookie, messageId);
-    if (!messageType || messageCookie != STUN_MAGIC)
-    {
-        // use this as an opportunity to flag a potential pair
-        foreach (Pair *pair, m_pairs) {
-            if (pair->remote.host() == remoteHost &&
-                pair->remote.port() == remotePort) {
-                m_fallbackPair = pair;
-                break;
-            }
-        }
-        emit datagramReceived(buffer);
-        return;
-    }
-
-    // determine password to use
-    QString messagePassword;
-    if (messageId != m_stunId)
-    {
-        messagePassword = (messageType & 0xFF00) ? m_remotePassword : m_localPassword;
-        if (messagePassword.isEmpty())
-            return;
-    }
-
-    // parse STUN message
-    QXmppStunMessage message;
-    QStringList errors;
-    if (!message.decode(buffer, messagePassword.toUtf8(), &errors))
-    {
-        foreach (const QString &error, errors)
-            warning(error);
-        return;
-    }
-#ifdef QXMPP_DEBUG_STUN
-    logReceived(QString("STUN packet from %1 port %2\n%3").arg(
-            remoteHost.toString(),
-            QString::number(remotePort),
-            message.toString()));
-#endif
-
-    // check how to handle message
-    if (message.id() == m_stunId)
-    {
-        m_stunTimer->stop();
-
-        // determine server-reflexive address
-        QHostAddress reflexiveHost;
-        quint16 reflexivePort = 0;
-        if (!message.xorMappedHost.isNull() && message.xorMappedPort != 0)
-        {
-            reflexiveHost = message.xorMappedHost;
-            reflexivePort = message.xorMappedPort;
-        }
-        else if (!message.mappedHost.isNull() && message.mappedPort != 0)
-        {
-            reflexiveHost = message.mappedHost;
-            reflexivePort = message.mappedPort;
-        } else {
-            warning("STUN server did not provide a reflexive address");
-            return;
-        }
-
-        // check whether this candidates is already known
-        foreach (const QXmppJingleCandidate &candidate, m_localCandidates)
-        {
-            if (candidate.host() == reflexiveHost &&
-                candidate.port() == reflexivePort &&
-                candidate.type() == QXmppJingleCandidate::ServerReflexiveType)
-                return;
-        }
-
-        // add the new local candidate
-        debug(QString("Adding server-reflexive candidate %1 port %2").arg(reflexiveHost.toString(), QString::number(reflexivePort)));
-        QXmppJingleCandidate candidate;
-        candidate.setComponent(m_component);
-        candidate.setHost(reflexiveHost);
-        candidate.setId(generateStanzaHash(10));
-        candidate.setPort(reflexivePort);
-        candidate.setProtocol("udp");
-        candidate.setType(QXmppJingleCandidate::ServerReflexiveType);
-        candidate.setPriority(candidatePriority(candidate));
-        m_localCandidates << candidate;
-
-        emit localCandidatesChanged();
-        return;
-    }
-
-    // process message from peer
-    Pair *pair = 0;
-    if (message.type() == (QXmppStunMessage::Binding | QXmppStunMessage::Request))
-    {
-        // add remote candidate
-        pair = addRemoteCandidate(socket, remoteHost, remotePort, message.priority());
-
-        // send a binding response
-        QXmppStunMessage response;
-        response.setId(message.id());
-        response.setType(QXmppStunMessage::Binding | QXmppStunMessage::Response);
-        response.setUsername(message.username());
-        response.xorMappedHost = pair->remote.host();
-        response.xorMappedPort = pair->remote.port();
-        writeStun(response, pair);
-
-        // update state
-        if (m_iceControlling || message.useCandidate)
-        {
-            debug(QString("ICE reverse check complete %1").arg(pair->toString()));
-            pair->checked |= QIODevice::ReadOnly;
-        }
-
-        if (!m_iceControlling && !m_activePair && !m_remoteUser.isEmpty())
-        {
-            // send a triggered connectivity test
-            QXmppStunMessage message;
-            message.setId(pair->transaction);
-            message.setType(QXmppStunMessage::Binding | QXmppStunMessage::Request);
-            message.setPriority(m_peerReflexivePriority);
-            message.setUsername(QString("%1:%2").arg(m_remoteUser, m_localUser));
-            message.iceControlled = QByteArray(8, 0);
-            writeStun(message, pair);
-        }
-
-    } else if (message.type() == (QXmppStunMessage::Binding | QXmppStunMessage::Response)) {
-
-        // find the pair for this transaction
-        foreach (Pair *ptr, m_pairs)
-        {
-            if (ptr->transaction == message.id())
-            {
-                pair = ptr;
-                break;
-            }
-        }
-        if (!pair)
-        {
-            debug(QString("Unknown transaction %1").arg(QString::fromAscii(message.id().toHex())));
-            return;
-        }
-        // store peer-reflexive address
-        pair->reflexive.setHost(message.xorMappedHost);
-        pair->reflexive.setPort(message.xorMappedPort);
-
-#if 0
-        // send a binding indication
-        QXmppStunMessage indication;
-        indication.setId(generateRandomBytes(ID_SIZE));
-        indication.setType(BindingIndication);
-        m_socket->writeStun(indication, pair);
-#endif
-
-        // outgoing media can flow
-        debug(QString("ICE forward check complete %1").arg(pair->toString()));
-        pair->checked |= QIODevice::WriteOnly;
-    }
-
-    // signal completion
-    if (pair && pair->checked == QIODevice::ReadWrite)
-    {
-        m_timer->stop();
-        if (!m_activePair || pair->priority() > m_activePair->priority()) {
-            info(QString("ICE pair selected %1 (priority: %2)").arg(
-                pair->toString(), QString::number(pair->priority())));
-            const bool wasConnected = (m_activePair != 0);
-            m_activePair = pair;
-            if (!wasConnected)
-                emit connected();
-        }
-    }
-}
-
-void QXmppIceComponent::turnConnected()
-{
-    // add the new local candidate
-    debug(QString("Adding relayed candidate %1 port %2").arg(
-        m_turnAllocation->relayedHost().toString(),
-        QString::number(m_turnAllocation->relayedPort())));
-    QXmppJingleCandidate candidate;
-    candidate.setComponent(m_component);
-    candidate.setHost(m_turnAllocation->relayedHost());
-    candidate.setId(generateStanzaHash(10));
-    candidate.setPort(m_turnAllocation->relayedPort());
-    candidate.setProtocol("udp");
-    candidate.setType(QXmppJingleCandidate::RelayedType);
-    candidate.setPriority(candidatePriority(candidate));
-    m_localCandidates << candidate;
-
-    emit localCandidatesChanged();
-}
-
-static QList<QUdpSocket*> reservePort(const QList<QHostAddress> &addresses, quint16 port, QObject *parent)
-{
-    QList<QUdpSocket*> sockets;
-    foreach (const QHostAddress &address, addresses) {
-        QUdpSocket *socket = new QUdpSocket(parent);
-        sockets << socket;
-        if (!socket->bind(address, port)) {
-            for (int i = 0; i < sockets.size(); ++i)
-                delete sockets[i];
-            sockets.clear();
-            break;
-        }
-    }
-    return sockets;
-}
-
-/// Returns the list of local network addresses.
-
-QList<QHostAddress> QXmppIceComponent::discoverAddresses()
-{
-    QList<QHostAddress> addresses;
-    foreach (const QNetworkInterface &interface, QNetworkInterface::allInterfaces())
-    {
-        if (!(interface.flags() & QNetworkInterface::IsRunning) ||
-            interface.flags() & QNetworkInterface::IsLoopBack)
-            continue;
-
-        foreach (const QNetworkAddressEntry &entry, interface.addressEntries())
-        {
-            QHostAddress ip = entry.ip();
-            if ((ip.protocol() != QAbstractSocket::IPv4Protocol &&
-                 ip.protocol() != QAbstractSocket::IPv6Protocol) ||
-                entry.netmask().isNull())
-                continue;
-
-#ifdef Q_OS_MAC
-            // FIXME: on Mac OS X, sending IPv6 UDP packets fails
-            if (ip.protocol() == QAbstractSocket::IPv6Protocol)
-                continue;
-#endif
-
-            // FIXME: for now skip IPv6 link-local addresses, seems to upset
-            // clients such as empathy
-            if (isIPv6LinkLocalAddress(ip)) {
-                ip.setScopeId(interface.name());
-                continue;
-            }
-            addresses << ip;
-        }
-    }
-    return addresses;
-}
-
-/// Tries to bind \a count UDP sockets on each of the given \a addresses.
-///
-/// The port numbers are chosen so that they are consecutive, starting at
-/// an even port. This makes them suitable for RTP/RTCP sockets pairs.
-///
-/// \param addresses The network address on which to bind the sockets.
-/// \param count     The number of ports to reserve.
-/// \param parent    The parent object for the sockets.
-
-QList<QUdpSocket*> QXmppIceComponent::reservePorts(const QList<QHostAddress> &addresses, int count, QObject *parent)
-{
-    QList<QUdpSocket*> sockets;
-    if (addresses.isEmpty() || !count)
-        return sockets;
-
-    const int expectedSize = addresses.size() * count;
-    quint16 port = 49152;
-    while (sockets.size() != expectedSize) {
-        // reserve first port (even number)
-        if (port % 2)
-            port++;
-        QList<QUdpSocket*> socketChunk;
-        while (socketChunk.isEmpty() && port <= 65536 - count) {
-            socketChunk = reservePort(addresses, port, parent);
-            if (socketChunk.isEmpty())
-                port += 2;
-        }
-        if (socketChunk.isEmpty())
-            return sockets;
-
-        // reserve other ports
-        sockets << socketChunk;
-        for (int i = 1; i < count; ++i) {
-            socketChunk = reservePort(addresses, ++port, parent);
-            if (socketChunk.isEmpty())
-                break;
-            sockets << socketChunk;
-        }
-
-        // cleanup if we failed
-        if (sockets.size() != expectedSize) {
-            for (int i = 0; i < sockets.size(); ++i)
-                delete sockets[i];
-            sockets.clear();
-        }
-    }
-    return sockets;
-}
-
-/// Sends a data packet to the remote party.
-///
-/// \param datagram
-
-qint64 QXmppIceComponent::sendDatagram(const QByteArray &datagram)
-{
-    Pair *pair = m_activePair ? m_activePair : m_fallbackPair;
-    if (!pair)
-        return -1;
-    if (pair->socket)
-        return pair->socket->writeDatagram(datagram, pair->remote.host(), pair->remote.port());
-    else if (m_turnAllocation->state() == QXmppTurnAllocation::ConnectedState)
-        return m_turnAllocation->writeDatagram(datagram, pair->remote.host(), pair->remote.port());
-    else
-        return -1;
-}
-
-/// Sends a STUN packet to the remote party.
-
-qint64 QXmppIceComponent::writeStun(const QXmppStunMessage &message, QXmppIceComponent::Pair *pair)
-{
-    qint64 ret;
-    const QString messagePassword = (message.type() & 0xFF00) ? m_localPassword : m_remotePassword;
-    if (pair->socket)
-        ret = pair->socket->writeDatagram(
-            message.encode(messagePassword.toUtf8()),
-            pair->remote.host(),
-            pair->remote.port());
-    else if (m_turnAllocation->state() == QXmppTurnAllocation::ConnectedState)
-        ret = m_turnAllocation->writeDatagram(
-            message.encode(messagePassword.toUtf8()),
-            pair->remote.host(),
-            pair->remote.port());
-    else
-        return -1;
-#ifdef QXMPP_DEBUG_STUN
-    logSent(QString("Sent to %1\n%2").arg(pair->toString(), message.toString()));
-#endif
-    return ret;
-}
-
-/// Constructs a new ICE connection.
-///
-/// \param controlling
-/// \param parent
-
-QXmppIceConnection::QXmppIceConnection(QObject *parent)
-    : QXmppLoggable(parent),
-    m_iceControlling(false),
-    m_stunPort(0)
-{
-    bool check;
-
-    m_localUser = generateStanzaHash(4);
-    m_localPassword = generateStanzaHash(22);
-
-    // timer to limit connection time to 30 seconds
-    m_connectTimer = new QTimer(this);
-    m_connectTimer->setInterval(30000);
-    m_connectTimer->setSingleShot(true);
-    check = connect(m_connectTimer, SIGNAL(timeout()),
-                    this, SLOT(slotTimeout()));
-    Q_ASSERT(check);
-    Q_UNUSED(check);
-}
-
-/// Returns the given component of this ICE connection.
-///
-/// \param component
-
-QXmppIceComponent *QXmppIceConnection::component(int component)
-{
-    return m_components.value(component);
-}
-
-/// Adds a component to this ICE connection, for instance 1 for RTP
-/// or 2 for RTCP.
-///
-/// \param component
-
-void QXmppIceConnection::addComponent(int component)
-{
-    bool check;
-    Q_UNUSED(check);
-
-    if (m_components.contains(component))
-    {
-        warning(QString("Already have component %1").arg(QString::number(component)));
-        return;
-    }
-
-    QXmppIceComponent *socket = new QXmppIceComponent(this);
-    socket->setComponent(component);
-    socket->setIceControlling(m_iceControlling);
-    socket->setLocalUser(m_localUser);
-    socket->setLocalPassword(m_localPassword);
-    socket->setStunServer(m_stunHost, m_stunPort);
-    socket->setTurnServer(m_turnHost, m_turnPort);
-    socket->setTurnUser(m_turnUser);
-    socket->setTurnPassword(m_turnPassword);
-
-    check = connect(socket, SIGNAL(localCandidatesChanged()),
-                    this, SIGNAL(localCandidatesChanged()));
-    Q_ASSERT(check);
-
-    check = connect(socket, SIGNAL(connected()),
-                    this, SLOT(slotConnected()));
-    Q_ASSERT(check);
-
-    m_components[component] = socket;
-}
-
-/// Adds a candidate for one of the remote components.
-///
-/// \param candidate
-
-void QXmppIceConnection::addRemoteCandidate(const QXmppJingleCandidate &candidate)
-{
-    QXmppIceComponent *socket = m_components.value(candidate.component());
-    if (!socket)
-    {
-        warning(QString("Not adding candidate for unknown component %1").arg(
-                QString::number(candidate.component())));
-        return;
-    }
-    socket->addRemoteCandidate(candidate);
-}
-
-/// Binds the local sockets to the specified addresses.
-///
-/// \param addresses The addresses on which to listen.
-
-bool QXmppIceConnection::bind(const QList<QHostAddress> &addresses)
-{
-    // reserve ports
-    QList<QUdpSocket*> sockets = QXmppIceComponent::reservePorts(addresses, m_components.size());
-    if (sockets.isEmpty() && !addresses.isEmpty())
-        return false;
-
-    // assign sockets
-    QList<int> keys = m_components.keys();
-    qSort(keys);
-    int s = 0;
-    foreach (int k, keys) {
-        m_components[k]->setSockets(sockets.mid(s, addresses.size()));
-        s += addresses.size();
-    }
-
-    return true;
-}
-
-/// Closes the ICE connection.
-
-void QXmppIceConnection::close()
-{
-    m_connectTimer->stop();
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->close();
-}
-
-/// Starts ICE connectivity checks.
-
-void QXmppIceConnection::connectToHost()
-{
-    if (isConnected() || m_connectTimer->isActive())
-        return;
-
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->connectToHost();
-    m_connectTimer->start();
-}
-
-
-/// Returns true if ICE negotiation completed, false otherwise.
-
-bool QXmppIceConnection::isConnected() const
-{
-    foreach (QXmppIceComponent *socket, m_components.values())
-        if (!socket->isConnected())
-            return false;
-    return true;
-}
-
-void QXmppIceConnection::setIceControlling(bool controlling)
-{
-    m_iceControlling = controlling;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setIceControlling(controlling);
-}
-
-/// Returns the list of local HOST CANDIDATES candidates by iterating
-/// over the available network interfaces.
-
-QList<QXmppJingleCandidate> QXmppIceConnection::localCandidates() const
-{
-    QList<QXmppJingleCandidate> candidates;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        candidates += socket->localCandidates();
-    return candidates;
-}
-
-/// Returns the local user fragment.
-
-QString QXmppIceConnection::localUser() const
-{
-    return m_localUser;
-}
-
-/// Sets the local user fragment.
-///
-/// You do not usually need to call this as one is automatically generated.
-///
-/// \param user
-
-void QXmppIceConnection::setLocalUser(const QString &user)
-{
-    m_localUser = user;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setLocalUser(user);
-}
-
-/// Returns the local password.
-
-QString QXmppIceConnection::localPassword() const
-{
-    return m_localPassword;
-}
-
-/// Sets the local password.
-///
-/// You do not usually need to call this as one is automatically generated.
-///
-/// \param password
-
-void QXmppIceConnection::setLocalPassword(const QString &password)
-{
-    m_localPassword = password;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setLocalPassword(password);
-}
-
-/// Sets the remote user fragment.
-///
-/// \param user
-
-void QXmppIceConnection::setRemoteUser(const QString &user)
-{
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setRemoteUser(user);
-}
-
-/// Sets the remote password.
-///
-/// \param password
-
-void QXmppIceConnection::setRemotePassword(const QString &password)
-{
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setRemotePassword(password);
-}
-
-/// Sets the STUN server to use to determine server-reflexive addresses
-/// and ports.
-///
-/// \param host The address of the STUN server.
-/// \param port The port of the STUN server.
-
-void QXmppIceConnection::setStunServer(const QHostAddress &host, quint16 port)
-{
-    m_stunHost = host;
-    m_stunPort = port;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setStunServer(host, port);
-}
-
-/// Sets the TURN server to use to relay packets in double-NAT configurations.
-///
-/// \param host The address of the TURN server.
-/// \param port The port of the TURN server.
-
-void QXmppIceConnection::setTurnServer(const QHostAddress &host, quint16 port)
-{
-    m_turnHost = host;
-    m_turnPort = port;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setTurnServer(host, port);
-}
-
-/// Sets the \a user used for authentication with the TURN server.
-///
-/// \param user
-
-void QXmppIceConnection::setTurnUser(const QString &user)
-{
-    m_turnUser = user;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setTurnUser(user);
-}
-
-/// Sets the \a password used for authentication with the TURN server.
-///
-/// \param password
-
-void QXmppIceConnection::setTurnPassword(const QString &password)
-{
-    m_turnPassword = password;
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->setTurnPassword(password);
-}
-
-void QXmppIceConnection::slotConnected()
-{
-    foreach (QXmppIceComponent *socket, m_components.values())
-        if (!socket->isConnected())
-            return;
-    info(QString("ICE negotiation completed"));
-    m_connectTimer->stop();
-    emit connected();
-}
-
-void QXmppIceConnection::slotTimeout()
-{
-    warning(QString("ICE negotiation timed out"));
-    foreach (QXmppIceComponent *socket, m_components.values())
-        socket->close();
-    emit disconnected();
-}
-