src/websockets/qwebsocket_p.cpp

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2014 Kurt Pattyn <pattyn.kurt@gmail.com>.
   4 ** Contact: http://www.qt-project.org/legal
   5 **
   6 ** This file is part of the QtWebSockets module of the Qt Toolkit.
   7 **
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  19 ** General Public License version 2.1 as published by the Free Software
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  21 ** packaging of this file.  Please review the following information to
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  26 ** rights.  These rights are described in the Digia Qt LGPL Exception
  27 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  28 **
  29 ** GNU General Public License Usage
  30 ** Alternatively, this file may be used under the terms of the GNU
  31 ** General Public License version 3.0 as published by the Free Software
  32 ** Foundation and appearing in the file LICENSE.GPL included in the
  33 ** packaging of this file.  Please review the following information to
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  35 ** met: http://www.gnu.org/copyleft/gpl.html.
  36 **
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  38 ** $QT_END_LICENSE$
  39 **
  40 ****************************************************************************/
  41
  42 #include "qwebsocket.h"
  43 #include "qwebsocket_p.h"
  44 #include "qwebsocketprotocol_p.h"
  45 #include "qwebsockethandshakerequest_p.h"
  46 #include "qwebsockethandshakeresponse_p.h"
  47 #include "qdefaultmaskgenerator_p.h"
  48
  49 #include <QtCore/QUrl>
  50 #include <QtNetwork/QAuthenticator>
  51 #include <QtNetwork/QTcpSocket>
  52 #include <QtCore/QByteArray>
  53 #include <QtCore/QtEndian>
  54 #include <QtCore/QCryptographicHash>
  55 #include <QtCore/QRegularExpression>
  56 #include <QtCore/QStringList>
  57 #include <QtNetwork/QHostAddress>
  58 #include <QtCore/QStringBuilder>   //for more efficient string concatenation
  59 #ifndef QT_NONETWORKPROXY
  60 #include <QtNetwork/QNetworkProxy>
  61 #endif
  62 #ifndef QT_NO_SSL
  63 #include <QtNetwork/QSslConfiguration>
  64 #include <QtNetwork/QSslError>
  65 #endif
  66
  67 #include <QtCore/QDebug>
  68
  69 #include <limits>
  70
  71 QT_BEGIN_NAMESPACE
  72
  73 const quint64 FRAME_SIZE_IN_BYTES = 512 * 512 * 2;      //maximum size of a frame when sending a message
  74
  75 QWebSocketConfiguration::QWebSocketConfiguration() :
  76 #ifndef QT_NO_SSL
  77     m_sslConfiguration(QSslConfiguration::defaultConfiguration()),
  78     m_ignoredSslErrors(),
  79     m_ignoreSslErrors(false),
  80 #endif
  81 #ifndef QT_NO_NETWORKPROXY
  82     m_proxy(QNetworkProxy::DefaultProxy),
  83 #endif
  84     m_pSocket(Q_NULLPTR)
  85 {
  86 }
  87
  88 /*!
  89     \internal
  90 */
  91 QWebSocketPrivate::QWebSocketPrivate(const QString &origin, QWebSocketProtocol::Version version,
  92                                      QWebSocket *pWebSocket) :
  93     QObjectPrivate(),
  94     q_ptr(pWebSocket),
  95     m_pSocket(),
  96     m_errorString(),
  97     m_version(version),
  98     m_resourceName(),
  99     m_requestUrl(),
 100     m_origin(origin),
 101     m_protocol(),
 102     m_extension(),
 103     m_socketState(QAbstractSocket::UnconnectedState),
 104     m_pauseMode(QAbstractSocket::PauseNever),
 105     m_readBufferSize(0),
 106     m_key(),
 107     m_mustMask(true),
 108     m_isClosingHandshakeSent(false),
 109     m_isClosingHandshakeReceived(false),
 110     m_closeCode(QWebSocketProtocol::CloseCodeNormal),
 111     m_closeReason(),
 112     m_pingTimer(),
 113     m_dataProcessor(),
 114     m_configuration(),
 115     m_pMaskGenerator(&m_defaultMaskGenerator),
 116     m_defaultMaskGenerator()
 117 {
 118 }
 119
 120 /*!
 121     \internal
 122 */
 123 QWebSocketPrivate::QWebSocketPrivate(QTcpSocket *pTcpSocket, QWebSocketProtocol::Version version,
 124                                      QWebSocket *pWebSocket) :
 125     QObjectPrivate(),
 126     q_ptr(pWebSocket),
 127     m_pSocket(pTcpSocket),
 128     m_errorString(pTcpSocket->errorString()),
 129     m_version(version),
 130     m_resourceName(),
 131     m_requestUrl(),
 132     m_origin(),
 133     m_protocol(),
 134     m_extension(),
 135     m_socketState(pTcpSocket->state()),
 136     m_pauseMode(pTcpSocket->pauseMode()),
 137     m_readBufferSize(pTcpSocket->readBufferSize()),
 138     m_key(),
 139     m_mustMask(true),
 140     m_isClosingHandshakeSent(false),
 141     m_isClosingHandshakeReceived(false),
 142     m_closeCode(QWebSocketProtocol::CloseCodeNormal),
 143     m_closeReason(),
 144     m_pingTimer(),
 145     m_dataProcessor(),
 146     m_configuration(),
 147     m_pMaskGenerator(&m_defaultMaskGenerator),
 148     m_defaultMaskGenerator()
 149 {
 150 }
 151
 152 /*!
 153     \internal
 154 */
 155 void QWebSocketPrivate::init()
 156 {
 157     Q_ASSERT(q_ptr);
 158     Q_ASSERT(m_pMaskGenerator);
 159
 160     m_pMaskGenerator->seed();
 161
 162     if (m_pSocket) {
 163         makeConnections(m_pSocket.data());
 164     }
 165 }
 166
 167 /*!
 168     \internal
 169 */
 170 QWebSocketPrivate::~QWebSocketPrivate()
 171 {
 172     if (!m_pSocket)
 173         return;
 174     if (state() == QAbstractSocket::ConnectedState)
 175         close(QWebSocketProtocol::CloseCodeGoingAway, QWebSocket::tr("Connection closed"));
 176     releaseConnections(m_pSocket.data());
 177 }
 178
 179 /*!
 180     \internal
 181  */
 182 void QWebSocketPrivate::abort()
 183 {
 184     if (m_pSocket)
 185         m_pSocket->abort();
 186 }
 187
 188 /*!
 189     \internal
 190  */
 191 QAbstractSocket::SocketError QWebSocketPrivate::error() const
 192 {
 193     QAbstractSocket::SocketError err = QAbstractSocket::UnknownSocketError;
 194     if (Q_LIKELY(m_pSocket))
 195         err = m_pSocket->error();
 196     return err;
 197 }
 198
 199 /*!
 200     \internal
 201  */
 202 QString QWebSocketPrivate::errorString() const
 203 {
 204     QString errMsg;
 205     if (!m_errorString.isEmpty())
 206         errMsg = m_errorString;
 207     else if (m_pSocket)
 208         errMsg = m_pSocket->errorString();
 209     return errMsg;
 210 }
 211
 212 /*!
 213     \internal
 214  */
 215 bool QWebSocketPrivate::flush()
 216 {
 217     bool result = true;
 218     if (Q_LIKELY(m_pSocket))
 219         result = m_pSocket->flush();
 220     return result;
 221 }
 222
 223 /*!
 224     \internal
 225  */
 226 qint64 QWebSocketPrivate::sendTextMessage(const QString &message)
 227 {
 228     return doWriteFrames(message.toUtf8(), false);
 229 }
 230
 231 /*!
 232     \internal
 233  */
 234 qint64 QWebSocketPrivate::sendBinaryMessage(const QByteArray &data)
 235 {
 236     return doWriteFrames(data, true);
 237 }
 238
 239 #ifndef QT_NO_SSL
 240 /*!
 241     \internal
 242  */
 243 void QWebSocketPrivate::setSslConfiguration(const QSslConfiguration &sslConfiguration)
 244 {
 245     m_configuration.m_sslConfiguration = sslConfiguration;
 246 }
 247
 248 /*!
 249     \internal
 250  */
 251 QSslConfiguration QWebSocketPrivate::sslConfiguration() const
 252 {
 253     return m_configuration.m_sslConfiguration;
 254 }
 255
 256 /*!
 257     \internal
 258  */
 259 void QWebSocketPrivate::ignoreSslErrors(const QList<QSslError> &errors)
 260 {
 261     m_configuration.m_ignoredSslErrors = errors;
 262 }
 263
 264 /*!
 265  * \internal
 266  */
 267 void QWebSocketPrivate::ignoreSslErrors()
 268 {
 269     m_configuration.m_ignoreSslErrors = true;
 270     if (Q_LIKELY(m_pSocket)) {
 271         QSslSocket *pSslSocket = qobject_cast<QSslSocket *>(m_pSocket.data());
 272         if (Q_LIKELY(pSslSocket))
 273             pSslSocket->ignoreSslErrors();
 274     }
 275 }
 276
 277 #endif
 278
 279 /*!
 280   Called from QWebSocketServer
 281   \internal
 282  */
 283 QWebSocket *QWebSocketPrivate::upgradeFrom(QTcpSocket *pTcpSocket,
 284                                            const QWebSocketHandshakeRequest &request,
 285                                            const QWebSocketHandshakeResponse &response,
 286                                            QObject *parent)
 287 {
 288     QWebSocket *pWebSocket = new QWebSocket(pTcpSocket, response.acceptedVersion(), parent);
 289     if (Q_LIKELY(pWebSocket)) {
 290         pWebSocket->d_func()->setExtension(response.acceptedExtension());
 291         pWebSocket->d_func()->setOrigin(request.origin());
 292         pWebSocket->d_func()->setRequestUrl(request.requestUrl());
 293         pWebSocket->d_func()->setProtocol(response.acceptedProtocol());
 294         pWebSocket->d_func()->setResourceName(request.requestUrl().toString(QUrl::RemoveUserInfo));
 295         //a server should not send masked frames
 296         pWebSocket->d_func()->enableMasking(false);
 297     }
 298
 299     return pWebSocket;
 300 }
 301
 302 /*!
 303     \internal
 304  */
 305 void QWebSocketPrivate::close(QWebSocketProtocol::CloseCode closeCode, QString reason)
 306 {
 307     if (Q_UNLIKELY(!m_pSocket))
 308         return;
 309     if (!m_isClosingHandshakeSent) {
 310         Q_Q(QWebSocket);
 311         const quint16 code = qToBigEndian<quint16>(closeCode);
 312         QByteArray payload;
 313         payload.append(static_cast<const char *>(static_cast<const void *>(&code)), 2);
 314         if (!reason.isEmpty())
 315             payload.append(reason.toUtf8());
 316         quint32 maskingKey = 0;
 317         if (m_mustMask) {
 318             maskingKey = generateMaskingKey();
 319             QWebSocketProtocol::mask(payload.data(), payload.size(), maskingKey);
 320         }
 321         QByteArray frame = getFrameHeader(QWebSocketProtocol::OpCodeClose,
 322                                           payload.size(), maskingKey, true);
 323         frame.append(payload);
 324         m_pSocket->write(frame);
 325         m_pSocket->flush();
 326
 327         m_isClosingHandshakeSent = true;
 328
 329         Q_EMIT q->aboutToClose();
 330     }
 331     m_pSocket->close();
 332 }
 333
 334 /*!
 335     \internal
 336  */
 337 void QWebSocketPrivate::open(const QUrl &url, bool mask)
 338 {
 339     //just delete the old socket for the moment;
 340     //later, we can add more 'intelligent' handling by looking at the URL
 341     //m_pSocket.reset();
 342     Q_Q(QWebSocket);
 343     if (!url.isValid() || url.toString().contains(QStringLiteral("\r\n"))) {
 344         setErrorString(QWebSocket::tr("Invalid URL."));
 345         Q_EMIT q->error(QAbstractSocket::ConnectionRefusedError);
 346         return;
 347     }
 348     QTcpSocket *pTcpSocket = m_pSocket.take();
 349     if (pTcpSocket) {
 350         releaseConnections(pTcpSocket);
 351         pTcpSocket->deleteLater();
 352     }
 353     //if (m_url != url)
 354     if (Q_LIKELY(!m_pSocket)) {
 355         m_dataProcessor.clear();
 356         m_isClosingHandshakeReceived = false;
 357         m_isClosingHandshakeSent = false;
 358
 359         setRequestUrl(url);
 360         QString resourceName = url.path();
 361         if (resourceName.contains(QStringLiteral("\r\n"))) {
 362             setRequestUrl(QUrl());  //clear requestUrl
 363             setErrorString(QWebSocket::tr("Invalid resource name."));
 364             Q_EMIT q->error(QAbstractSocket::ConnectionRefusedError);
 365             return;
 366         }
 367         if (!url.query().isEmpty()) {
 368             if (!resourceName.endsWith(QChar::fromLatin1('?'))) {
 369                 resourceName.append(QChar::fromLatin1('?'));
 370             }
 371             resourceName.append(url.query());
 372         }
 373         if (resourceName.isEmpty())
 374             resourceName = QStringLiteral("/");
 375         setResourceName(resourceName);
 376         enableMasking(mask);
 377
 378     #ifndef QT_NO_SSL
 379         if (url.scheme() == QStringLiteral("wss")) {
 380             if (!QSslSocket::supportsSsl()) {
 381                 const QString message =
 382                         QWebSocket::tr("SSL Sockets are not supported on this platform.");
 383                 setErrorString(message);
 384                 Q_EMIT q->error(QAbstractSocket::UnsupportedSocketOperationError);
 385             } else {
 386                 QSslSocket *sslSocket = new QSslSocket;
 387                 m_pSocket.reset(sslSocket);
 388                 if (Q_LIKELY(m_pSocket)) {
 389                     m_pSocket->setSocketOption(QAbstractSocket::LowDelayOption, 1);
 390                     m_pSocket->setSocketOption(QAbstractSocket::KeepAliveOption, 1);
 391                     m_pSocket->setReadBufferSize(m_readBufferSize);
 392                     m_pSocket->setPauseMode(m_pauseMode);
 393
 394                     makeConnections(m_pSocket.data());
 395                     QObject::connect(sslSocket, &QSslSocket::encryptedBytesWritten, q,
 396                                      &QWebSocket::bytesWritten);
 397                     typedef void (QSslSocket:: *sslErrorSignalType)(const QList<QSslError> &);
 398                     QObject::connect(sslSocket,
 399                                      static_cast<sslErrorSignalType>(&QSslSocket::sslErrors),
 400                                      q, &QWebSocket::sslErrors);
 401                     setSocketState(QAbstractSocket::ConnectingState);
 402
 403                     sslSocket->setSslConfiguration(m_configuration.m_sslConfiguration);
 404                     if (Q_UNLIKELY(m_configuration.m_ignoreSslErrors))
 405                         sslSocket->ignoreSslErrors();
 406                     else
 407                         sslSocket->ignoreSslErrors(m_configuration.m_ignoredSslErrors);
 408     #ifndef QT_NO_NETWORKPROXY
 409                     sslSocket->setProxy(m_configuration.m_proxy);
 410     #endif
 411                     sslSocket->connectToHostEncrypted(url.host(), url.port(443));
 412                 } else {
 413                     const QString message = QWebSocket::tr("Out of memory.");
 414                     setErrorString(message);
 415                     Q_EMIT q->error(QAbstractSocket::SocketResourceError);
 416                 }
 417             }
 418         } else
 419     #endif
 420         if (url.scheme() == QStringLiteral("ws")) {
 421             m_pSocket.reset(new QTcpSocket);
 422             if (Q_LIKELY(m_pSocket)) {
 423                 m_pSocket->setSocketOption(QAbstractSocket::LowDelayOption, 1);
 424                 m_pSocket->setSocketOption(QAbstractSocket::KeepAliveOption, 1);
 425                 m_pSocket->setReadBufferSize(m_readBufferSize);
 426                 m_pSocket->setPauseMode(m_pauseMode);
 427
 428                 makeConnections(m_pSocket.data());
 429                 QObject::connect(m_pSocket.data(), &QAbstractSocket::bytesWritten, q,
 430                                  &QWebSocket::bytesWritten);
 431                 setSocketState(QAbstractSocket::ConnectingState);
 432     #ifndef QT_NO_NETWORKPROXY
 433                 m_pSocket->setProxy(m_configuration.m_proxy);
 434     #endif
 435                 m_pSocket->connectToHost(url.host(), url.port(80));
 436             } else {
 437                 const QString message = QWebSocket::tr("Out of memory.");
 438                 setErrorString(message);
 439                 Q_EMIT q->error(QAbstractSocket::SocketResourceError);
 440             }
 441         } else {
 442             const QString message =
 443                     QWebSocket::tr("Unsupported WebSocket scheme: %1").arg(url.scheme());
 444             setErrorString(message);
 445             Q_EMIT q->error(QAbstractSocket::UnsupportedSocketOperationError);
 446         }
 447     }
 448 }
 449
 450 /*!
 451     \internal
 452  */
 453 void QWebSocketPrivate::ping(const QByteArray &payload)
 454 {
 455     QByteArray payloadTruncated = payload.left(125);
 456     m_pingTimer.restart();
 457     QByteArray pingFrame = getFrameHeader(QWebSocketProtocol::OpCodePing, payloadTruncated.size(),
 458                                           0 /*do not mask*/, true);
 459     pingFrame.append(payloadTruncated);
 460     qint64 ret = writeFrame(pingFrame);
 461     Q_UNUSED(ret);
 462 }
 463
 464 /*!
 465   \internal
 466     Sets the version to use for the WebSocket protocol;
 467     this must be set before the socket is opened.
 468 */
 469 void QWebSocketPrivate::setVersion(QWebSocketProtocol::Version version)
 470 {
 471     if (m_version != version)
 472         m_version = version;
 473 }
 474
 475 /*!
 476     \internal
 477     Sets the resource name of the connection; must be set before the socket is openend
 478 */
 479 void QWebSocketPrivate::setResourceName(const QString &resourceName)
 480 {
 481     if (m_resourceName != resourceName)
 482         m_resourceName = resourceName;
 483 }
 484
 485 /*!
 486   \internal
 487  */
 488 void QWebSocketPrivate::setRequestUrl(const QUrl &requestUrl)
 489 {
 490     if (m_requestUrl != requestUrl)
 491         m_requestUrl = requestUrl;
 492 }
 493
 494 /*!
 495   \internal
 496  */
 497 void QWebSocketPrivate::setOrigin(const QString &origin)
 498 {
 499     if (m_origin != origin)
 500         m_origin = origin;
 501 }
 502
 503 /*!
 504   \internal
 505  */
 506 void QWebSocketPrivate::setProtocol(const QString &protocol)
 507 {
 508     if (m_protocol != protocol)
 509         m_protocol = protocol;
 510 }
 511
 512 /*!
 513   \internal
 514  */
 515 void QWebSocketPrivate::setExtension(const QString &extension)
 516 {
 517     if (m_extension != extension)
 518         m_extension = extension;
 519 }
 520
 521 /*!
 522   \internal
 523  */
 524 void QWebSocketPrivate::enableMasking(bool enable)
 525 {
 526     if (m_mustMask != enable)
 527         m_mustMask = enable;
 528 }
 529
 530 /*!
 531  * \internal
 532  */
 533 void QWebSocketPrivate::makeConnections(const QTcpSocket *pTcpSocket)
 534 {
 535     Q_ASSERT(pTcpSocket);
 536     Q_Q(QWebSocket);
 537
 538     if (Q_LIKELY(pTcpSocket)) {
 539         //pass through signals
 540         typedef void (QAbstractSocket:: *ASErrorSignal)(QAbstractSocket::SocketError);
 541         typedef void (QWebSocket:: *WSErrorSignal)(QAbstractSocket::SocketError);
 542         QObject::connect(pTcpSocket,
 543                          static_cast<ASErrorSignal>(&QAbstractSocket::error),
 544                          q, static_cast<WSErrorSignal>(&QWebSocket::error));
 545 #ifndef QT_NO_NETWORKPROXY
 546         QObject::connect(pTcpSocket, &QAbstractSocket::proxyAuthenticationRequired, q,
 547                          &QWebSocket::proxyAuthenticationRequired);
 548 #endif
 549         QObject::connect(pTcpSocket, &QAbstractSocket::readChannelFinished, q,
 550                          &QWebSocket::readChannelFinished);
 551         QObject::connect(pTcpSocket, &QAbstractSocket::aboutToClose, q, &QWebSocket::aboutToClose);
 552
 553         //catch signals
 554         QObjectPrivate::connect(pTcpSocket, &QAbstractSocket::stateChanged, this,
 555                                 &QWebSocketPrivate::processStateChanged);
 556         //!!!important to use a QueuedConnection here;
 557         //with QTcpSocket there is no problem, but with QSslSocket the processing hangs
 558         QObjectPrivate::connect(pTcpSocket, &QAbstractSocket::readyRead, this,
 559                                 &QWebSocketPrivate::processData, Qt::QueuedConnection);
 560     }
 561
 562     QObject::connect(&m_dataProcessor, &QWebSocketDataProcessor::textFrameReceived, q,
 563                      &QWebSocket::textFrameReceived);
 564     QObject::connect(&m_dataProcessor, &QWebSocketDataProcessor::binaryFrameReceived, q,
 565                      &QWebSocket::binaryFrameReceived);
 566     QObject::connect(&m_dataProcessor, &QWebSocketDataProcessor::binaryMessageReceived, q,
 567                      &QWebSocket::binaryMessageReceived);
 568     QObject::connect(&m_dataProcessor, &QWebSocketDataProcessor::textMessageReceived, q,
 569                      &QWebSocket::textMessageReceived);
 570     QObjectPrivate::connect(&m_dataProcessor, &QWebSocketDataProcessor::errorEncountered, this,
 571                             &QWebSocketPrivate::close);
 572     QObjectPrivate::connect(&m_dataProcessor, &QWebSocketDataProcessor::pingReceived, this,
 573                             &QWebSocketPrivate::processPing);
 574     QObjectPrivate::connect(&m_dataProcessor, &QWebSocketDataProcessor::pongReceived, this,
 575                             &QWebSocketPrivate::processPong);
 576     QObjectPrivate::connect(&m_dataProcessor, &QWebSocketDataProcessor::closeReceived, this,
 577                             &QWebSocketPrivate::processClose);
 578 }
 579
 580 /*!
 581  * \internal
 582  */
 583 void QWebSocketPrivate::releaseConnections(const QTcpSocket *pTcpSocket)
 584 {
 585     if (Q_LIKELY(pTcpSocket))
 586         pTcpSocket->disconnect(pTcpSocket);
 587     m_dataProcessor.disconnect();
 588 }
 589
 590 /*!
 591     \internal
 592  */
 593 QWebSocketProtocol::Version QWebSocketPrivate::version() const
 594 {
 595     return m_version;
 596 }
 597
 598 /*!
 599     \internal
 600  */
 601 QString QWebSocketPrivate::resourceName() const
 602 {
 603     return m_resourceName;
 604 }
 605
 606 /*!
 607     \internal
 608  */
 609 QUrl QWebSocketPrivate::requestUrl() const
 610 {
 611     return m_requestUrl;
 612 }
 613
 614 /*!
 615     \internal
 616  */
 617 QString QWebSocketPrivate::origin() const
 618 {
 619     return m_origin;
 620 }
 621
 622 /*!
 623     \internal
 624  */
 625 QString QWebSocketPrivate::protocol() const
 626 {
 627     return m_protocol;
 628 }
 629
 630 /*!
 631     \internal
 632  */
 633 QString QWebSocketPrivate::extension() const
 634 {
 635     return m_extension;
 636 }
 637
 638 /*!
 639  * \internal
 640  */
 641 QWebSocketProtocol::CloseCode QWebSocketPrivate::closeCode() const
 642 {
 643     return m_closeCode;
 644 }
 645
 646 /*!
 647  * \internal
 648  */
 649 QString QWebSocketPrivate::closeReason() const
 650 {
 651     return m_closeReason;
 652 }
 653
 654 /*!
 655  * \internal
 656  */
 657 QByteArray QWebSocketPrivate::getFrameHeader(QWebSocketProtocol::OpCode opCode,
 658                                              quint64 payloadLength, quint32 maskingKey,
 659                                              bool lastFrame)
 660 {
 661     QByteArray header;
 662     quint8 byte = 0x00;
 663     bool ok = payloadLength <= 0x7FFFFFFFFFFFFFFFULL;
 664
 665     if (Q_LIKELY(ok)) {
 666         //FIN, RSV1-3, opcode (RSV-1, RSV-2 and RSV-3 are zero)
 667         byte = static_cast<quint8>((opCode & 0x0F) | (lastFrame ? 0x80 : 0x00));
 668         header.append(static_cast<char>(byte));
 669
 670         byte = 0x00;
 671         if (maskingKey != 0)
 672             byte |= 0x80;
 673         if (payloadLength <= 125) {
 674             byte |= static_cast<quint8>(payloadLength);
 675             header.append(static_cast<char>(byte));
 676         } else if (payloadLength <= 0xFFFFU) {
 677             byte |= 126;
 678             header.append(static_cast<char>(byte));
 679             quint16 swapped = qToBigEndian<quint16>(static_cast<quint16>(payloadLength));
 680             header.append(static_cast<const char *>(static_cast<const void *>(&swapped)), 2);
 681         } else if (payloadLength <= 0x7FFFFFFFFFFFFFFFULL) {
 682             byte |= 127;
 683             header.append(static_cast<char>(byte));
 684             quint64 swapped = qToBigEndian<quint64>(payloadLength);
 685             header.append(static_cast<const char *>(static_cast<const void *>(&swapped)), 8);
 686         }
 687
 688         if (maskingKey != 0) {
 689             const quint32 mask = qToBigEndian<quint32>(maskingKey);
 690             header.append(static_cast<const char *>(static_cast<const void *>(&mask)),
 691                           sizeof(quint32));
 692         }
 693     } else {
 694         setErrorString(QStringLiteral("WebSocket::getHeader: payload too big!"));
 695         Q_EMIT q_ptr->error(QAbstractSocket::DatagramTooLargeError);
 696     }
 697
 698     return header;
 699 }
 700
 701 /*!
 702  * \internal
 703  */
 704 qint64 QWebSocketPrivate::doWriteFrames(const QByteArray &data, bool isBinary)
 705 {
 706     qint64 payloadWritten = 0;
 707     if (Q_UNLIKELY(!m_pSocket) || (state() != QAbstractSocket::ConnectedState))
 708         return payloadWritten;
 709
 710     Q_Q(QWebSocket);
 711     const QWebSocketProtocol::OpCode firstOpCode = isBinary ?
 712                 QWebSocketProtocol::OpCodeBinary : QWebSocketProtocol::OpCodeText;
 713
 714     int numFrames = data.size() / FRAME_SIZE_IN_BYTES;
 715     QByteArray tmpData(data);
 716     tmpData.detach();
 717     char *payload = tmpData.data();
 718     quint64 sizeLeft = quint64(data.size()) % FRAME_SIZE_IN_BYTES;
 719     if (Q_LIKELY(sizeLeft))
 720         ++numFrames;
 721
 722     //catch the case where the payload is zero bytes;
 723     //in this case, we still need to send a frame
 724     if (Q_UNLIKELY(numFrames == 0))
 725         numFrames = 1;
 726     quint64 currentPosition = 0;
 727     qint64 bytesWritten = 0;
 728     quint64 bytesLeft = data.size();
 729
 730     for (int i = 0; i < numFrames; ++i) {
 731         quint32 maskingKey = 0;
 732         if (m_mustMask)
 733             maskingKey = generateMaskingKey();
 734
 735         const bool isLastFrame = (i == (numFrames - 1));
 736         const bool isFirstFrame = (i == 0);
 737
 738         const quint64 size = qMin(bytesLeft, FRAME_SIZE_IN_BYTES);
 739         const QWebSocketProtocol::OpCode opcode = isFirstFrame ? firstOpCode
 740                                                                : QWebSocketProtocol::OpCodeContinue;
 741
 742         //write header
 743         bytesWritten += m_pSocket->write(getFrameHeader(opcode, size, maskingKey, isLastFrame));
 744
 745         //write payload
 746         if (Q_LIKELY(size > 0)) {
 747             char *currentData = payload + currentPosition;
 748             if (m_mustMask)
 749                 QWebSocketProtocol::mask(currentData, size, maskingKey);
 750             qint64 written = m_pSocket->write(currentData, static_cast<qint64>(size));
 751             if (Q_LIKELY(written > 0)) {
 752                 bytesWritten += written;
 753                 payloadWritten += written;
 754             } else {
 755                 m_pSocket->flush();
 756                 setErrorString(QWebSocket::tr("Error writing bytes to socket: %1.")
 757                                .arg(m_pSocket->errorString()));
 758                 Q_EMIT q->error(QAbstractSocket::NetworkError);
 759                 break;
 760             }
 761         }
 762         currentPosition += size;
 763         bytesLeft -= size;
 764     }
 765     if (Q_UNLIKELY(payloadWritten != data.size())) {
 766         setErrorString(QWebSocket::tr("Bytes written %1 != %2.")
 767                        .arg(payloadWritten).arg(data.size()));
 768         Q_EMIT q->error(QAbstractSocket::NetworkError);
 769     }
 770     return payloadWritten;
 771 }
 772
 773 /*!
 774     \internal
 775  */
 776 quint32 QWebSocketPrivate::generateMaskingKey() const
 777 {
 778     return m_pMaskGenerator->nextMask();
 779 }
 780
 781 /*!
 782     \internal
 783  */
 784 QByteArray QWebSocketPrivate::generateKey() const
 785 {
 786     QByteArray key;
 787
 788     for (int i = 0; i < 4; ++i) {
 789         const quint32 tmp = m_pMaskGenerator->nextMask();
 790         key.append(static_cast<const char *>(static_cast<const void *>(&tmp)), sizeof(quint32));
 791     }
 792
 793     return key.toBase64();
 794 }
 795
 796
 797 /*!
 798     \internal
 799  */
 800 QString QWebSocketPrivate::calculateAcceptKey(const QByteArray &key) const
 801 {
 802     const QByteArray tmpKey = key + QByteArrayLiteral("258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
 803     const QByteArray hash = QCryptographicHash::hash(tmpKey, QCryptographicHash::Sha1).toBase64();
 804     return QString::fromLatin1(hash);
 805 }
 806
 807 /*!
 808     \internal
 809  */
 810 qint64 QWebSocketPrivate::writeFrames(const QList<QByteArray> &frames)
 811 {
 812     qint64 written = 0;
 813     if (Q_LIKELY(m_pSocket)) {
 814         QList<QByteArray>::const_iterator it;
 815         for (it = frames.cbegin(); it < frames.cend(); ++it)
 816             written += writeFrame(*it);
 817     }
 818     return written;
 819 }
 820
 821 /*!
 822     \internal
 823  */
 824 qint64 QWebSocketPrivate::writeFrame(const QByteArray &frame)
 825 {
 826     qint64 written = 0;
 827     if (Q_LIKELY(m_pSocket))
 828         written = m_pSocket->write(frame);
 829     return written;
 830 }
 831
 832 /*!
 833     \internal
 834  */
 835 QString readLine(QTcpSocket *pSocket)
 836 {
 837     Q_ASSERT(pSocket);
 838     QString line;
 839     char c;
 840     while (pSocket->getChar(&c)) {
 841         if (c == char('\r')) {
 842             pSocket->getChar(&c);
 843             break;
 844         } else {
 845             line.append(QChar::fromLatin1(c));
 846         }
 847     }
 848     return line;
 849 }
 850
 851 // this function is a copy of QHttpNetworkReplyPrivate::parseStatus
 852 static bool parseStatusLine(const QByteArray &status, int *majorVersion, int *minorVersion,
 853                             int *statusCode, QString *reasonPhrase)
 854 {
 855     // from RFC 2616:
 856     //        Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF
 857     //        HTTP-Version   = "HTTP" "/" 1*DIGIT "." 1*DIGIT
 858     // that makes: 'HTTP/n.n xxx Message'
 859     // byte count:  0123456789012
 860
 861     static const int minLength = 11;
 862     static const int dotPos = 6;
 863     static const int spacePos = 8;
 864     static const char httpMagic[] = "HTTP/";
 865
 866     if (status.length() < minLength
 867         || !status.startsWith(httpMagic)
 868         || status.at(dotPos) != '.'
 869         || status.at(spacePos) != ' ') {
 870         // I don't know how to parse this status line
 871         return false;
 872     }
 873
 874     // optimize for the valid case: defer checking until the end
 875     *majorVersion = status.at(dotPos - 1) - '0';
 876     *minorVersion = status.at(dotPos + 1) - '0';
 877
 878     int i = spacePos;
 879     int j = status.indexOf(' ', i + 1); // j == -1 || at(j) == ' ' so j+1 == 0 && j+1 <= length()
 880     const QByteArray code = status.mid(i + 1, j - i - 1);
 881
 882     bool ok;
 883     *statusCode = code.toInt(&ok);
 884     *reasonPhrase = QString::fromLatin1(status.constData() + j + 1);
 885
 886     return ok && uint(*majorVersion) <= 9 && uint(* minorVersion) <= 9;
 887 }
 888
 889
 890 //called on the client for a server handshake response
 891 /*!
 892     \internal
 893  */
 894 void QWebSocketPrivate::processHandshake(QTcpSocket *pSocket)
 895 {
 896     Q_Q(QWebSocket);
 897     if (Q_UNLIKELY(!pSocket))
 898         return;
 899
 900     bool ok = false;
 901     QString errorDescription;
 902
 903     const QByteArray statusLine = pSocket->readLine();
 904     int httpMajorVersion, httpMinorVersion;
 905     int httpStatusCode;
 906     QString httpStatusMessage;
 907     if (Q_UNLIKELY(!parseStatusLine(statusLine, &httpMajorVersion, &httpMinorVersion,
 908                                     &httpStatusCode, &httpStatusMessage))) {
 909         errorDescription = QWebSocket::tr("Invalid statusline in response: %1.").arg(QString::fromLatin1(statusLine));
 910     } else {
 911         QString headerLine = readLine(pSocket);
 912         QMap<QString, QString> headers;
 913         while (!headerLine.isEmpty()) {
 914             const QStringList headerField = headerLine.split(QStringLiteral(": "),
 915                                                              QString::SkipEmptyParts);
 916             if (headerField.size() == 2) {
 917                 headers.insertMulti(headerField[0].toLower(), headerField[1]);
 918             }
 919             headerLine = readLine(pSocket);
 920         }
 921
 922         const QString acceptKey = headers.value(QStringLiteral("sec-websocket-accept"),
 923                                                 QString());
 924         const QString upgrade = headers.value(QStringLiteral("upgrade"), QString());
 925         const QString connection = headers.value(QStringLiteral("connection"), QString());
 926 //        unused for the moment
 927 //        const QString extensions = headers.value(QStringLiteral("sec-websocket-extensions"),
 928 //                                                 QString());
 929 //        const QString protocol = headers.value(QStringLiteral("sec-websocket-protocol"),
 930 //                                               QString());
 931         const QString version = headers.value(QStringLiteral("sec-websocket-version"),
 932                                               QString());
 933
 934         if (Q_LIKELY(httpStatusCode == 101)) {
 935             //HTTP/x.y 101 Switching Protocols
 936             //TODO: do not check the httpStatusText right now
 937             ok = !(acceptKey.isEmpty() ||
 938                    (httpMajorVersion < 1 || httpMinorVersion < 1) ||
 939                    (upgrade.toLower() != QStringLiteral("websocket")) ||
 940                    (connection.toLower() != QStringLiteral("upgrade")));
 941             if (ok) {
 942                 const QString accept = calculateAcceptKey(m_key);
 943                 ok = (accept == acceptKey);
 944                 if (!ok)
 945                     errorDescription =
 946                       QWebSocket::tr("Accept-Key received from server %1 does not match the client key %2.")
 947                             .arg(acceptKey).arg(accept);
 948             } else {
 949                 errorDescription =
 950                     QWebSocket::tr("QWebSocketPrivate::processHandshake: Invalid statusline in response: %1.")
 951                         .arg(QString::fromLatin1(statusLine));
 952             }
 953         } else if (httpStatusCode == 400) {
 954             //HTTP/1.1 400 Bad Request
 955             if (!version.isEmpty()) {
 956                 const QStringList versions = version.split(QStringLiteral(", "),
 957                                                            QString::SkipEmptyParts);
 958                 if (!versions.contains(QString::number(QWebSocketProtocol::currentVersion()))) {
 959                     //if needed to switch protocol version, then we are finished here
 960                     //because we cannot handle other protocols than the RFC one (v13)
 961                     errorDescription =
 962                             QWebSocket::tr("Handshake: Server requests a version that we don't support: %1.")
 963                             .arg(versions.join(QStringLiteral(", ")));
 964                     ok = false;
 965                 } else {
 966                     //we tried v13, but something different went wrong
 967                     errorDescription =
 968                         QWebSocket::tr("QWebSocketPrivate::processHandshake: Unknown error condition encountered. Aborting connection.");
 969                     ok = false;
 970                 }
 971             }
 972         } else {
 973             errorDescription =
 974                     QWebSocket::tr("QWebSocketPrivate::processHandshake: Unhandled http status code: %1 (%2).")
 975                         .arg(httpStatusCode).arg(httpStatusMessage);
 976             ok = false;
 977         }
 978
 979         if (!ok) {
 980             setErrorString(errorDescription);
 981             Q_EMIT q->error(QAbstractSocket::ConnectionRefusedError);
 982         } else {
 983             //handshake succeeded
 984             setSocketState(QAbstractSocket::ConnectedState);
 985             Q_EMIT q->connected();
 986         }
 987     }
 988 }
 989
 990 /*!
 991     \internal
 992  */
 993 void QWebSocketPrivate::processStateChanged(QAbstractSocket::SocketState socketState)
 994 {
 995     Q_ASSERT(m_pSocket);
 996     Q_Q(QWebSocket);
 997     QAbstractSocket::SocketState webSocketState = this->state();
 998     switch (socketState) {
 999     case QAbstractSocket::ConnectedState:
1000         if (webSocketState == QAbstractSocket::ConnectingState) {
1001             m_key = generateKey();
1002             const QString handshake =
1003                     createHandShakeRequest(m_resourceName,
1004                                            m_requestUrl.host()
1005                                                 % QStringLiteral(":")
1006                                                 % QString::number(m_requestUrl.port(80)),
1007                                            origin(),
1008                                            QString(),
1009                                            QString(),
1010                                            m_key);
1011             if (handshake.isEmpty()) {
1012                 m_pSocket->abort();
1013                 Q_EMIT q->error(QAbstractSocket::ConnectionRefusedError);
1014                 return;
1015             }
1016             m_pSocket->write(handshake.toLatin1());
1017         }
1018         break;
1019
1020     case QAbstractSocket::ClosingState:
1021         if (webSocketState == QAbstractSocket::ConnectedState)
1022             setSocketState(QAbstractSocket::ClosingState);
1023         break;
1024
1025     case QAbstractSocket::UnconnectedState:
1026         if (webSocketState != QAbstractSocket::UnconnectedState) {
1027             setSocketState(QAbstractSocket::UnconnectedState);
1028             Q_EMIT q->disconnected();
1029         }
1030         break;
1031
1032     case QAbstractSocket::HostLookupState:
1033     case QAbstractSocket::ConnectingState:
1034     case QAbstractSocket::BoundState:
1035     case QAbstractSocket::ListeningState:
1036         //do nothing
1037         //to make C++ compiler happy;
1038         break;
1039     default:
1040         break;
1041     }
1042 }
1043
1044 /*!
1045  \internal
1046  */
1047 void QWebSocketPrivate::processData()
1048 {
1049     Q_ASSERT(m_pSocket);
1050     while (m_pSocket->bytesAvailable()) {
1051         if (state() == QAbstractSocket::ConnectingState)
1052             processHandshake(m_pSocket.data());
1053         else
1054             m_dataProcessor.process(m_pSocket.data());
1055     }
1056 }
1057
1058 /*!
1059  \internal
1060  */
1061 void QWebSocketPrivate::processPing(const QByteArray &data)
1062 {
1063     Q_ASSERT(m_pSocket);
1064     quint32 maskingKey = 0;
1065     if (m_mustMask)
1066         maskingKey = generateMaskingKey();
1067     m_pSocket->write(getFrameHeader(QWebSocketProtocol::OpCodePong, data.size(), maskingKey, true));
1068     if (data.size() > 0) {
1069         QByteArray maskedData = data;
1070         if (m_mustMask)
1071             QWebSocketProtocol::mask(&maskedData, maskingKey);
1072         m_pSocket->write(maskedData);
1073     }
1074 }
1075
1076 /*!
1077  \internal
1078  */
1079 void QWebSocketPrivate::processPong(const QByteArray &data)
1080 {
1081     Q_Q(QWebSocket);
1082     Q_EMIT q->pong(static_cast<quint64>(m_pingTimer.elapsed()), data);
1083 }
1084
1085 /*!
1086  \internal
1087  */
1088 void QWebSocketPrivate::processClose(QWebSocketProtocol::CloseCode closeCode, QString closeReason)
1089 {
1090     m_isClosingHandshakeReceived = true;
1091     close(closeCode, closeReason);
1092 }
1093
1094 /*!
1095     \internal
1096  */
1097 QString QWebSocketPrivate::createHandShakeRequest(QString resourceName,
1098                                                   QString host,
1099                                                   QString origin,
1100                                                   QString extensions,
1101                                                   QString protocols,
1102                                                   QByteArray key)
1103 {
1104     QStringList handshakeRequest;
1105     if (resourceName.contains(QStringLiteral("\r\n"))) {
1106         setErrorString(QWebSocket::tr("The resource name contains newlines. " \
1107                                       "Possible attack detected."));
1108         return QString();
1109     }
1110     if (host.contains(QStringLiteral("\r\n"))) {
1111         setErrorString(QWebSocket::tr("The hostname contains newlines. " \
1112                                       "Possible attack detected."));
1113         return QString();
1114     }
1115     if (origin.contains(QStringLiteral("\r\n"))) {
1116         setErrorString(QWebSocket::tr("The origin contains newlines. " \
1117                                       "Possible attack detected."));
1118         return QString();
1119     }
1120     if (extensions.contains(QStringLiteral("\r\n"))) {
1121         setErrorString(QWebSocket::tr("The extensions attribute contains newlines. " \
1122                                       "Possible attack detected."));
1123         return QString();
1124     }
1125     if (protocols.contains(QStringLiteral("\r\n"))) {
1126         setErrorString(QWebSocket::tr("The protocols attribute contains newlines. " \
1127                                       "Possible attack detected."));
1128         return QString();
1129     }
1130
1131     handshakeRequest << QStringLiteral("GET ") % resourceName % QStringLiteral(" HTTP/1.1") <<
1132                         QStringLiteral("Host: ") % host <<
1133                         QStringLiteral("Upgrade: websocket") <<
1134                         QStringLiteral("Connection: Upgrade") <<
1135                         QStringLiteral("Sec-WebSocket-Key: ") % QString::fromLatin1(key);
1136     if (!origin.isEmpty())
1137         handshakeRequest << QStringLiteral("Origin: ") % origin;
1138     handshakeRequest << QStringLiteral("Sec-WebSocket-Version: ")
1139                             % QString::number(QWebSocketProtocol::currentVersion());
1140     if (extensions.length() > 0)
1141         handshakeRequest << QStringLiteral("Sec-WebSocket-Extensions: ") % extensions;
1142     if (protocols.length() > 0)
1143         handshakeRequest << QStringLiteral("Sec-WebSocket-Protocol: ") % protocols;
1144     handshakeRequest << QStringLiteral("\r\n");
1145
1146     return handshakeRequest.join(QStringLiteral("\r\n"));
1147 }
1148
1149 /*!
1150     \internal
1151  */
1152 QAbstractSocket::SocketState QWebSocketPrivate::state() const
1153 {
1154     return m_socketState;
1155 }
1156
1157 /*!
1158     \internal
1159  */
1160 void QWebSocketPrivate::setSocketState(QAbstractSocket::SocketState state)
1161 {
1162     Q_Q(QWebSocket);
1163     if (m_socketState != state) {
1164         m_socketState = state;
1165         Q_EMIT q->stateChanged(m_socketState);
1166     }
1167 }
1168
1169 /*!
1170     \internal
1171  */
1172 void QWebSocketPrivate::setErrorString(const QString &errorString)
1173 {
1174     if (m_errorString != errorString)
1175         m_errorString = errorString;
1176 }
1177
1178 /*!
1179     \internal
1180  */
1181 QHostAddress QWebSocketPrivate::localAddress() const
1182 {
1183     QHostAddress address;
1184     if (Q_LIKELY(m_pSocket))
1185         address = m_pSocket->localAddress();
1186     return address;
1187 }
1188
1189 /*!
1190     \internal
1191  */
1192 quint16 QWebSocketPrivate::localPort() const
1193 {
1194     quint16 port = 0;
1195     if (Q_LIKELY(m_pSocket))
1196         port = m_pSocket->localPort();
1197     return port;
1198 }
1199
1200 /*!
1201     \internal
1202  */
1203 QAbstractSocket::PauseModes QWebSocketPrivate::pauseMode() const
1204 {
1205     return m_pauseMode;
1206 }
1207
1208 /*!
1209     \internal
1210  */
1211 QHostAddress QWebSocketPrivate::peerAddress() const
1212 {
1213     QHostAddress address;
1214     if (Q_LIKELY(m_pSocket))
1215         address = m_pSocket->peerAddress();
1216     return address;
1217 }
1218
1219 /*!
1220     \internal
1221  */
1222 QString QWebSocketPrivate::peerName() const
1223 {
1224     QString name;
1225     if (Q_LIKELY(m_pSocket))
1226         name = m_pSocket->peerName();
1227     return name;
1228 }
1229
1230 /*!
1231     \internal
1232  */
1233 quint16 QWebSocketPrivate::peerPort() const
1234 {
1235     quint16 port = 0;
1236     if (Q_LIKELY(m_pSocket))
1237         port = m_pSocket->peerPort();
1238     return port;
1239 }
1240
1241 #ifndef QT_NO_NETWORKPROXY
1242 /*!
1243     \internal
1244  */
1245 QNetworkProxy QWebSocketPrivate::proxy() const
1246 {
1247     return m_configuration.m_proxy;
1248 }
1249
1250 /*!
1251     \internal
1252  */
1253 void QWebSocketPrivate::setProxy(const QNetworkProxy &networkProxy)
1254 {
1255     if (m_configuration.m_proxy != networkProxy)
1256         m_configuration.m_proxy = networkProxy;
1257 }
1258 #endif  //QT_NO_NETWORKPROXY
1259
1260 /*!
1261     \internal
1262  */
1263 void QWebSocketPrivate::setMaskGenerator(const QMaskGenerator *maskGenerator)
1264 {
1265     if (!maskGenerator)
1266         m_pMaskGenerator = &m_defaultMaskGenerator;
1267     else if (maskGenerator != m_pMaskGenerator)
1268         m_pMaskGenerator = const_cast<QMaskGenerator *>(maskGenerator);
1269 }
1270
1271 /*!
1272     \internal
1273  */
1274 const QMaskGenerator *QWebSocketPrivate::maskGenerator() const
1275 {
1276     Q_ASSERT(m_pMaskGenerator);
1277     return m_pMaskGenerator;
1278 }
1279
1280 /*!
1281     \internal
1282  */
1283 qint64 QWebSocketPrivate::readBufferSize() const
1284 {
1285     return m_readBufferSize;
1286 }
1287
1288 /*!
1289     \internal
1290  */
1291 void QWebSocketPrivate::resume()
1292 {
1293     if (Q_LIKELY(m_pSocket))
1294         m_pSocket->resume();
1295 }
1296
1297 /*!
1298   \internal
1299  */
1300 void QWebSocketPrivate::setPauseMode(QAbstractSocket::PauseModes pauseMode)
1301 {
1302     m_pauseMode = pauseMode;
1303     if (Q_LIKELY(m_pSocket))
1304         m_pSocket->setPauseMode(m_pauseMode);
1305 }
1306
1307 /*!
1308     \internal
1309  */
1310 void QWebSocketPrivate::setReadBufferSize(qint64 size)
1311 {
1312     m_readBufferSize = size;
1313     if (Q_LIKELY(m_pSocket))
1314         m_pSocket->setReadBufferSize(m_readBufferSize);
1315 }
1316
1317 /*!
1318     \internal
1319  */
1320 bool QWebSocketPrivate::isValid() const
1321 {
1322     return (m_pSocket && m_pSocket->isValid() &&
1323             (m_socketState == QAbstractSocket::ConnectedState));
1324 }
1325
1326 QT_END_NAMESPACE