summaryrefslogtreecommitdiffstats
path: root/src/network/socket/qnativesocketengine_winrt.cpp
blob: b6a739d1b814b5b5409e4bc7dc0b3b08a233b713 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <qt_windows.h>

#include "qnativesocketengine_winrt_p.h"

#include <qcoreapplication.h>
#include <qabstracteventdispatcher.h>
#include <qsocketnotifier.h>
#include <qdatetime.h>
#include <qnetworkinterface.h>
#include <qelapsedtimer.h>
#include <qthread.h>
#include <qabstracteventdispatcher.h>
#include <qfunctions_winrt.h>

#include <private/qthread_p.h>
#include <private/qabstractsocket_p.h>
#include <private/qeventdispatcher_winrt_p.h>

#ifndef QT_NO_SSL
#include <QSslSocket>
#endif

#include <functional>
#include <wrl.h>
#include <windows.foundation.collections.h>
#include <windows.storage.streams.h>
#include <windows.networking.h>
#include <windows.networking.sockets.h>
#include <robuffer.h>

using namespace Microsoft::WRL;
using namespace Microsoft::WRL::Wrappers;
using namespace ABI::Windows::Foundation;
using namespace ABI::Windows::Foundation::Collections;
using namespace ABI::Windows::Storage::Streams;
using namespace ABI::Windows::Networking;
using namespace ABI::Windows::Networking::Connectivity;
using namespace ABI::Windows::Networking::Sockets;

typedef ITypedEventHandler<StreamSocketListener *, StreamSocketListenerConnectionReceivedEventArgs *> ClientConnectedHandler;
typedef ITypedEventHandler<DatagramSocket *, DatagramSocketMessageReceivedEventArgs *> DatagramReceivedHandler;
typedef IAsyncOperationWithProgressCompletedHandler<IBuffer *, UINT32> SocketReadCompletedHandler;
typedef IAsyncOperationWithProgressCompletedHandler<UINT32, UINT32> SocketWriteCompletedHandler;
typedef IAsyncOperationWithProgress<IBuffer *, UINT32> IAsyncBufferOperation;

QT_BEGIN_NAMESPACE

static QByteArray socketDescription(const QAbstractSocketEngine *s)
{
    QByteArray result;
    if (const QObject *o = s->parent()) {
        const QString name = o->objectName();
        if (!name.isEmpty()) {
            result += '"';
            result += name.toLocal8Bit();
            result += "\"/";
        }
        result += o->metaObject()->className();
    }
    return result;
}

// Common constructs
#define Q_CHECK_VALID_SOCKETLAYER(function, returnValue) do { \
    if (!isValid()) { \
        qWarning(""#function" was called on an uninitialized socket device"); \
        return returnValue; \
    } } while (0)
#define Q_CHECK_INVALID_SOCKETLAYER(function, returnValue) do { \
    if (isValid()) { \
        qWarning(""#function" was called on an already initialized socket device"); \
        return returnValue; \
    } } while (0)
#define Q_CHECK_STATE(function, checkState, returnValue) do { \
    if (d->socketState != (checkState)) { \
        qWarning(""#function" was not called in "#checkState); \
        return (returnValue); \
    } } while (0)
#define Q_CHECK_NOT_STATE(function, checkState, returnValue) do { \
    if (d->socketState == (checkState)) { \
        qWarning(""#function" was called in "#checkState); \
        return (returnValue); \
    } } while (0)
#define Q_CHECK_STATES(function, state1, state2, returnValue) do { \
    if (d->socketState != (state1) && d->socketState != (state2)) { \
        qWarning(""#function" was called" \
                 " not in "#state1" or "#state2); \
        return (returnValue); \
    } } while (0)
#define Q_CHECK_TYPE(function, type, returnValue) do { \
    if (d->socketType != (type)) { \
        qWarning(#function" was called by a" \
                 " socket other than "#type""); \
        return (returnValue); \
    } } while (0)
#define Q_TR(a) QT_TRANSLATE_NOOP(QNativeSocketEngine, a)

typedef QHash<qintptr, IStreamSocket *> TcpSocketHash;

struct SocketHandler
{
    SocketHandler() : socketCount(0) {}
    qintptr socketCount;
    TcpSocketHash pendingTcpSockets;
};

Q_GLOBAL_STATIC(SocketHandler, gSocketHandler)

struct SocketGlobal
{
    SocketGlobal()
    {
        HRESULT hr;
        hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Storage_Streams_Buffer).Get(),
                                  &bufferFactory);
        Q_ASSERT_SUCCEEDED(hr);
    }

    ComPtr<IBufferFactory> bufferFactory;
};
Q_GLOBAL_STATIC(SocketGlobal, g)

static inline QString qt_QStringFromHString(const HString &string)
{
    UINT32 length;
    PCWSTR rawString = string.GetRawBuffer(&length);
    return QString::fromWCharArray(rawString, length);
}

#define READ_BUFFER_SIZE 65536

template <typename T>
static AsyncStatus opStatus(const ComPtr<T> &op)
{
    ComPtr<IAsyncInfo> info;
    HRESULT hr = op.As(&info);
    Q_ASSERT_SUCCEEDED(hr);
    AsyncStatus status;
    hr = info->get_Status(&status);
    Q_ASSERT_SUCCEEDED(hr);
    return status;
}

static qint64 writeIOStream(ComPtr<IOutputStream> stream, const char *data, qint64 len)
{
    ComPtr<IBuffer> buffer;
    HRESULT hr = g->bufferFactory->Create(len, &buffer);
    Q_ASSERT_SUCCEEDED(hr);
    hr = buffer->put_Length(len);
    Q_ASSERT_SUCCEEDED(hr);
    ComPtr<Windows::Storage::Streams::IBufferByteAccess> byteArrayAccess;
    hr = buffer.As(&byteArrayAccess);
    Q_ASSERT_SUCCEEDED(hr);
    byte *bytes;
    hr = byteArrayAccess->Buffer(&bytes);
    Q_ASSERT_SUCCEEDED(hr);
    memcpy(bytes, data, len);
    ComPtr<IAsyncOperationWithProgress<UINT32, UINT32>> op;
    hr = stream->WriteAsync(buffer.Get(), &op);
    RETURN_IF_FAILED("Failed to write to stream", return -1);
    UINT32 bytesWritten;
    hr = QWinRTFunctions::await(op, &bytesWritten);
    RETURN_IF_FAILED("Failed to write to stream", return -1);
    return bytesWritten;
}

QNativeSocketEngine::QNativeSocketEngine(QObject *parent)
    : QAbstractSocketEngine(*new QNativeSocketEnginePrivate(), parent)
{
#ifndef QT_NO_SSL
    Q_D(QNativeSocketEngine);
    if (parent)
        d->sslSocket = qobject_cast<QSslSocket *>(parent->parent());
#endif

    connect(this, SIGNAL(connectionReady()), SLOT(connectionNotification()), Qt::QueuedConnection);
    connect(this, SIGNAL(readReady()), SLOT(readNotification()), Qt::QueuedConnection);
    connect(this, SIGNAL(writeReady()), SLOT(writeNotification()), Qt::QueuedConnection);
}

QNativeSocketEngine::~QNativeSocketEngine()
{
    close();
}

bool QNativeSocketEngine::initialize(QAbstractSocket::SocketType type, QAbstractSocket::NetworkLayerProtocol protocol)
{
    Q_D(QNativeSocketEngine);
    if (isValid())
        close();

    // Create the socket
    if (!d->createNewSocket(type, protocol))
        return false;

    d->socketType = type;
    d->socketProtocol = protocol;
    return true;
}

bool QNativeSocketEngine::initialize(qintptr socketDescriptor, QAbstractSocket::SocketState socketState)
{
    Q_D(QNativeSocketEngine);

    if (isValid())
        close();

    // Currently, only TCP sockets are initialized this way.
    IStreamSocket *socket = gSocketHandler->pendingTcpSockets.take(socketDescriptor);
    d->socketDescriptor = qintptr(socket);
    d->socketType = QAbstractSocket::TcpSocket;

    if (!d->socketDescriptor || !d->fetchConnectionParameters()) {
        d->setError(QAbstractSocket::UnsupportedSocketOperationError,
            d->InvalidSocketErrorString);
        d->socketDescriptor = -1;
        return false;
    }

    // Start processing incoming data
    if (d->socketType == QAbstractSocket::TcpSocket) {
        HRESULT hr;
        QEventDispatcherWinRT::runOnXamlThread([d, &hr, socket, this]() {
            ComPtr<IBuffer> buffer;
            HRESULT hr = g->bufferFactory->Create(READ_BUFFER_SIZE, &buffer);
            RETURN_OK_IF_FAILED("initialize(): Could not create buffer");
            ComPtr<IInputStream> stream;
            hr = socket->get_InputStream(&stream);
            RETURN_OK_IF_FAILED("initialize(): Could not obtain input stream");
            hr = stream->ReadAsync(buffer.Get(), READ_BUFFER_SIZE, InputStreamOptions_Partial, d->readOp.GetAddressOf());
            RETURN_OK_IF_FAILED_WITH_ARGS("initialize(): Failed to read from the socket buffer (%s).",
                              socketDescription(this).constData());
            hr = d->readOp->put_Completed(Callback<SocketReadCompletedHandler>(d, &QNativeSocketEnginePrivate::handleReadyRead).Get());
            RETURN_OK_IF_FAILED_WITH_ARGS("initialize(): Failed to set socket read callback (%s).",
                              socketDescription(this).constData());
            return S_OK;
        });
        if (FAILED(hr))
            return false;
    }

    d->socketState = socketState;
    return true;
}

qintptr QNativeSocketEngine::socketDescriptor() const
{
    Q_D(const QNativeSocketEngine);
    return d->socketDescriptor;
}

bool QNativeSocketEngine::isValid() const
{
    Q_D(const QNativeSocketEngine);
    return d->socketDescriptor != -1;
}

bool QNativeSocketEngine::connectToHost(const QHostAddress &address, quint16 port)
{
    const QString addressString = address.toString();
    return connectToHostByName(addressString, port);
}

bool QNativeSocketEngine::connectToHostByName(const QString &name, quint16 port)
{
    Q_D(QNativeSocketEngine);
    HStringReference hostNameRef(reinterpret_cast<LPCWSTR>(name.utf16()));
    ComPtr<IHostNameFactory> hostNameFactory;
    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Networking_HostName).Get(),
                                      &hostNameFactory);
    Q_ASSERT_SUCCEEDED(hr);
    ComPtr<IHostName> remoteHost;
    hr = hostNameFactory->CreateHostName(hostNameRef.Get(), &remoteHost);
    RETURN_FALSE_IF_FAILED("QNativeSocketEngine::connectToHostByName: Could not create hostname.");

    const QString portString = QString::number(port);
    HStringReference portReference(reinterpret_cast<LPCWSTR>(portString.utf16()));
    if (d->socketType == QAbstractSocket::TcpSocket)
        hr = d->tcpSocket()->ConnectAsync(remoteHost.Get(), portReference.Get(), &d->connectOp);
    else if (d->socketType == QAbstractSocket::UdpSocket)
        hr = d->udpSocket()->ConnectAsync(remoteHost.Get(), portReference.Get(), &d->connectOp);
    if (hr == E_ACCESSDENIED) {
        qErrnoWarning(hr, "QNativeSocketEngine::connectToHostByName: Unable to connect to host (%s:%hu/%s). "
                          "Please check your manifest capabilities.",
                      qPrintable(name), port, socketDescription(this).constData());
        return false;
    }
    Q_ASSERT_SUCCEEDED(hr);

    d->socketState = QAbstractSocket::ConnectingState;
    QEventDispatcherWinRT::runOnXamlThread([d, &hr]() {
        hr = d->connectOp->put_Completed(Callback<IAsyncActionCompletedHandler>(
                                         d, &QNativeSocketEnginePrivate::handleConnectOpFinished).Get());
        RETURN_OK_IF_FAILED("connectToHostByName: Could not register \"connectOp\" callback");
        return S_OK;
    });
    if (FAILED(hr))
        return false;

    return d->socketState == QAbstractSocket::ConnectedState;
}

bool QNativeSocketEngine::bind(const QHostAddress &address, quint16 port)
{
    Q_D(QNativeSocketEngine);
    HRESULT hr;
    // runOnXamlThread may only return S_OK (will assert otherwise) so no need to check its result.
    // hr is set inside the lambda though. If an error occurred hr will point that out.
    bool specificErrorSet = false;
    QEventDispatcherWinRT::runOnXamlThread([address, d, &hr, port, &specificErrorSet, this]() {
        ComPtr<IHostName> hostAddress;

        if (address != QHostAddress::Any && address != QHostAddress::AnyIPv4 && address != QHostAddress::AnyIPv6) {
            ComPtr<IHostNameFactory> hostNameFactory;
            hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Networking_HostName).Get(),
                                      &hostNameFactory);
            RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Could not obtain hostname factory");
            const QString addressString = address.toString();
            HStringReference addressRef(reinterpret_cast<LPCWSTR>(addressString.utf16()));
            hr = hostNameFactory->CreateHostName(addressRef.Get(), &hostAddress);
            RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Could not create hostname.");
        }

        QString portQString = port ? QString::number(port) : QString();
        HStringReference portString(reinterpret_cast<LPCWSTR>(portQString.utf16()));

        ComPtr<IAsyncAction> op;
        if (d->socketType == QAbstractSocket::TcpSocket) {
            if (!d->tcpListener) {
                hr = RoActivateInstance(HString::MakeReference(RuntimeClass_Windows_Networking_Sockets_StreamSocketListener).Get(),
                                        &d->tcpListener);
                RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Could not create tcp listener");
            }

            hr = d->tcpListener->add_ConnectionReceived(
                        Callback<ClientConnectedHandler>(d, &QNativeSocketEnginePrivate::handleClientConnection).Get(),
                        &d->connectionToken);
            RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Could not register client connection callback");
            hr = d->tcpListener->BindEndpointAsync(hostAddress.Get(), portString.Get(), &op);
        } else if (d->socketType == QAbstractSocket::UdpSocket) {
            hr = d->udpSocket()->BindEndpointAsync(hostAddress.Get(), portString.Get(), &op);
        }
        if (hr == E_ACCESSDENIED) {
            qErrnoWarning(hr, "Unable to bind socket (%s:%hu/%s). Please check your manifest capabilities.",
                          qPrintable(address.toString()), port, socketDescription(this).constData());
            d->setError(QAbstractSocket::SocketAccessError,
                     QNativeSocketEnginePrivate::AccessErrorString);
            d->socketState = QAbstractSocket::UnconnectedState;
            specificErrorSet = true;
            return S_OK;
        }
        RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Unable to bind socket");

        hr = QWinRTFunctions::await(op);
        if (hr == 0x80072741) { // The requested address is not valid in its context
            d->setError(QAbstractSocket::SocketAddressNotAvailableError,
                     QNativeSocketEnginePrivate::AddressNotAvailableErrorString);
            d->socketState = QAbstractSocket::UnconnectedState;
            specificErrorSet = true;
            return S_OK;
        // Only one usage of each socket address (protocol/network address/port) is normally permitted
        } else if (hr == 0x80072740) {
            d->setError(QAbstractSocket::AddressInUseError,
                QNativeSocketEnginePrivate::AddressInuseErrorString);
            d->socketState = QAbstractSocket::UnconnectedState;
            specificErrorSet = true;
            return S_OK;
        }
        RETURN_OK_IF_FAILED("QNativeSocketEngine::bind: Could not wait for bind to finish");
        return S_OK;
    });
    if (FAILED(hr)) {
        if (!specificErrorSet) {
            d->setError(QAbstractSocket::UnknownSocketError,
                     QNativeSocketEnginePrivate::UnknownSocketErrorString);
            d->socketState = QAbstractSocket::UnconnectedState;
        }
        return false;
    }

    d->socketState = QAbstractSocket::BoundState;
    return d->fetchConnectionParameters();
}

bool QNativeSocketEngine::listen()
{
    Q_D(QNativeSocketEngine);
    Q_CHECK_VALID_SOCKETLAYER(QNativeSocketEngine::listen(), false);
    Q_CHECK_STATE(QNativeSocketEngine::listen(), QAbstractSocket::BoundState, false);
    Q_CHECK_TYPE(QNativeSocketEngine::listen(), QAbstractSocket::TcpSocket, false);

    if (d->tcpListener && d->socketDescriptor != -1) {
        d->socketState = QAbstractSocket::ListeningState;
        return true;
    }
    return false;
}

int QNativeSocketEngine::accept()
{
    Q_D(QNativeSocketEngine);
    Q_CHECK_VALID_SOCKETLAYER(QNativeSocketEngine::accept(), -1);
    Q_CHECK_STATE(QNativeSocketEngine::accept(), QAbstractSocket::ListeningState, -1);
    Q_CHECK_TYPE(QNativeSocketEngine::accept(), QAbstractSocket::TcpSocket, -1);

    if (d->socketDescriptor == -1 || d->pendingConnections.isEmpty()) {
        d->setError(QAbstractSocket::TemporaryError, QNativeSocketEnginePrivate::TemporaryErrorString);
        return -1;
    }

    if (d->socketType == QAbstractSocket::TcpSocket) {
        IStreamSocket *socket = d->pendingConnections.takeFirst();

        SocketHandler *handler = gSocketHandler();
        handler->pendingTcpSockets.insert(++handler->socketCount, socket);
        return handler->socketCount;
    }

    return -1;
}

void QNativeSocketEngine::close()
{
    Q_D(QNativeSocketEngine);

    if (d->closingDown)
        return;

    d->closingDown = true;


    d->notifyOnRead = false;
    d->notifyOnWrite = false;
    d->notifyOnException = false;

    HRESULT hr;
    if (d->connectOp) {
        ComPtr<IAsyncInfo> info;
        hr = d->connectOp.As(&info);
        Q_ASSERT_SUCCEEDED(hr);
        if (info) {
            hr = info->Cancel();
            Q_ASSERT_SUCCEEDED(hr);
            hr = info->Close();
            Q_ASSERT_SUCCEEDED(hr);
        }
    }

#if _MSC_VER >= 1900
    if (d->socketType == QAbstractSocket::TcpSocket) {
        hr = QEventDispatcherWinRT::runOnXamlThread([d]() {
            HRESULT hr;
            // To close the connection properly (not with a hard reset) all pending read operation have to
            // be finished or cancelled. The API isn't available on Windows 8.1 though.
            ComPtr<IStreamSocket3> socket3;
            hr = d->tcpSocket()->QueryInterface(IID_PPV_ARGS(&socket3));
            Q_ASSERT_SUCCEEDED(hr);

            ComPtr<IAsyncAction> action;
            hr = socket3->CancelIOAsync(&action);
            Q_ASSERT_SUCCEEDED(hr);
            hr = QWinRTFunctions::await(action, QWinRTFunctions::YieldThread, 5000);
            // If there is no pending IO (no read established before) the function will fail with
            // "function was called at an unexpected time" which is fine.
            // Timeout is fine as well. The result will be the socket being hard reset instead of
            // being closed gracefully
            if (hr != E_ILLEGAL_METHOD_CALL && hr != ERROR_TIMEOUT)
                Q_ASSERT_SUCCEEDED(hr);
            return S_OK;
        });
        Q_ASSERT_SUCCEEDED(hr);
    }
#endif // _MSC_VER >= 1900

    if (d->readOp) {
        ComPtr<IAsyncInfo> info;
        hr = d->readOp.As(&info);
        Q_ASSERT_SUCCEEDED(hr);
        if (info) {
            hr = info->Cancel();
            Q_ASSERT_SUCCEEDED(hr);
            hr = info->Close();
            Q_ASSERT_SUCCEEDED(hr);
        }
    }

    if (d->socketDescriptor != -1) {
        ComPtr<IClosable> socket;
        if (d->socketType == QAbstractSocket::TcpSocket) {
            hr = d->tcpSocket()->QueryInterface(IID_PPV_ARGS(&socket));
            Q_ASSERT_SUCCEEDED(hr);
            hr = d->tcpSocket()->Release();
            Q_ASSERT_SUCCEEDED(hr);
        } else if (d->socketType == QAbstractSocket::UdpSocket) {
            hr = d->udpSocket()->QueryInterface(IID_PPV_ARGS(&socket));
            Q_ASSERT_SUCCEEDED(hr);
            hr = d->udpSocket()->Release();
            Q_ASSERT_SUCCEEDED(hr);
        }

        if (socket) {
            hr = socket->Close();
            Q_ASSERT_SUCCEEDED(hr);
        }
        d->socketDescriptor = -1;
    }
    d->socketState = QAbstractSocket::UnconnectedState;
    d->hasSetSocketError = false;
    d->localPort = 0;
    d->localAddress.clear();
    d->peerPort = 0;
    d->peerAddress.clear();
}

bool QNativeSocketEngine::joinMulticastGroup(const QHostAddress &groupAddress, const QNetworkInterface &iface)
{
    Q_UNUSED(groupAddress);
    Q_UNUSED(iface);
    Q_UNIMPLEMENTED();
    return false;
}

bool QNativeSocketEngine::leaveMulticastGroup(const QHostAddress &groupAddress, const QNetworkInterface &iface)
{
    Q_UNUSED(groupAddress);
    Q_UNUSED(iface);
    Q_UNIMPLEMENTED();
    return false;
}

QNetworkInterface QNativeSocketEngine::multicastInterface() const
{
    Q_UNIMPLEMENTED();
    return QNetworkInterface();
}

bool QNativeSocketEngine::setMulticastInterface(const QNetworkInterface &iface)
{
    Q_UNUSED(iface);
    Q_UNIMPLEMENTED();
    return false;
}

qint64 QNativeSocketEngine::bytesAvailable() const
{
    Q_D(const QNativeSocketEngine);
    if (d->socketType != QAbstractSocket::TcpSocket)
        return -1;

    return d->readBytes.size() - d->readBytes.pos();
}

qint64 QNativeSocketEngine::read(char *data, qint64 maxlen)
{
    Q_D(QNativeSocketEngine);
    if (d->socketType != QAbstractSocket::TcpSocket)
        return -1;

    // There will be a read notification when the socket was closed by the remote host. If that
    // happens and there isn't anything left in the buffer, we have to return -1 in order to signal
    // the closing of the socket.
    if (d->readBytes.pos() == d->readBytes.size() && d->socketState != QAbstractSocket::ConnectedState) {
        close();
        return -1;
    }

    QMutexLocker mutexLocker(&d->readMutex);
    return d->readBytes.read(data, maxlen);
}

qint64 QNativeSocketEngine::write(const char *data, qint64 len)
{
    Q_D(QNativeSocketEngine);
    if (!isValid())
        return -1;

    HRESULT hr = E_FAIL;
    ComPtr<IOutputStream> stream;
    if (d->socketType == QAbstractSocket::TcpSocket)
        hr = d->tcpSocket()->get_OutputStream(&stream);
    else if (d->socketType == QAbstractSocket::UdpSocket)
        hr = d->udpSocket()->get_OutputStream(&stream);
    Q_ASSERT_SUCCEEDED(hr);

    qint64 bytesWritten = writeIOStream(stream, data, len);
    if (bytesWritten < 0)
        d->setError(QAbstractSocket::SocketAccessError, QNativeSocketEnginePrivate::AccessErrorString);
    else if (bytesWritten > 0 && d->notifyOnWrite)
        emit writeReady();

    return bytesWritten;
}

qint64 QNativeSocketEngine::readDatagram(char *data, qint64 maxlen, QIpPacketHeader *header,
                                         PacketHeaderOptions)
{
    Q_D(QNativeSocketEngine);
    if (d->socketType != QAbstractSocket::UdpSocket || d->pendingDatagrams.isEmpty()) {
        if (header)
            header->clear();
        return -1;
    }

    WinRtDatagram datagram = d->pendingDatagrams.takeFirst();
    if (header)
        *header = datagram.header;

    QByteArray readOrigin;
    // Do not read the whole datagram. Put the rest of it back into the "queue"
    if (maxlen < datagram.data.length()) {
        QByteArray readOrigin = datagram.data.left(maxlen);
        datagram.data = datagram.data.remove(0, maxlen);
        d->pendingDatagrams.prepend(datagram);
    } else {
        readOrigin = datagram.data;
    }
    memcpy(data, readOrigin, qMin(maxlen, qint64(datagram.data.length())));
    return readOrigin.length();
}

qint64 QNativeSocketEngine::writeDatagram(const char *data, qint64 len, const QIpPacketHeader &header)
{
    Q_D(QNativeSocketEngine);
    if (d->socketType != QAbstractSocket::UdpSocket)
        return -1;

    ComPtr<IHostName> remoteHost;
    ComPtr<IHostNameFactory> hostNameFactory;

    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Networking_HostName).Get(),
                                    &hostNameFactory);
    Q_ASSERT_SUCCEEDED(hr);
    const QString addressString = header.destinationAddress.toString();
    HStringReference hostNameRef(reinterpret_cast<LPCWSTR>(addressString.utf16()));
    hr = hostNameFactory->CreateHostName(hostNameRef.Get(), &remoteHost);
    RETURN_IF_FAILED("QNativeSocketEngine::writeDatagram: Could not create hostname.", return -1);

    ComPtr<IAsyncOperation<IOutputStream *>> streamOperation;
    ComPtr<IOutputStream> stream;
    const QString portString = QString::number(header.destinationPort);
    HStringReference portRef(reinterpret_cast<LPCWSTR>(portString.utf16()));
    hr = d->udpSocket()->GetOutputStreamAsync(remoteHost.Get(), portRef.Get(), &streamOperation);
    Q_ASSERT_SUCCEEDED(hr);

    hr = QWinRTFunctions::await(streamOperation, stream.GetAddressOf());
    Q_ASSERT_SUCCEEDED(hr);

    return writeIOStream(stream, data, len);
}

bool QNativeSocketEngine::hasPendingDatagrams() const
{
    Q_D(const QNativeSocketEngine);
    return d->pendingDatagrams.length() > 0;
}

qint64 QNativeSocketEngine::pendingDatagramSize() const
{
    Q_D(const QNativeSocketEngine);
    if (d->pendingDatagrams.isEmpty())
        return -1;

    return d->pendingDatagrams.at(0).data.length();
}

qint64 QNativeSocketEngine::bytesToWrite() const
{
    return 0;
}

qint64 QNativeSocketEngine::receiveBufferSize() const
{
    Q_D(const QNativeSocketEngine);
    return d->option(QAbstractSocketEngine::ReceiveBufferSocketOption);
}

void QNativeSocketEngine::setReceiveBufferSize(qint64 bufferSize)
{
    Q_D(QNativeSocketEngine);
    d->setOption(QAbstractSocketEngine::ReceiveBufferSocketOption, bufferSize);
}

qint64 QNativeSocketEngine::sendBufferSize() const
{
    Q_D(const QNativeSocketEngine);
    return d->option(QAbstractSocketEngine::SendBufferSocketOption);
}

void QNativeSocketEngine::setSendBufferSize(qint64 bufferSize)
{
    Q_D(QNativeSocketEngine);
    d->setOption(QAbstractSocketEngine::SendBufferSocketOption, bufferSize);
}

int QNativeSocketEngine::option(QAbstractSocketEngine::SocketOption option) const
{
    Q_D(const QNativeSocketEngine);
    return d->option(option);
}

bool QNativeSocketEngine::setOption(QAbstractSocketEngine::SocketOption option, int value)
{
    Q_D(QNativeSocketEngine);
    return d->setOption(option, value);
}

bool QNativeSocketEngine::waitForRead(int msecs, bool *timedOut)
{
    Q_D(QNativeSocketEngine);
    Q_CHECK_VALID_SOCKETLAYER(QNativeSocketEngine::waitForRead(), false);
    Q_CHECK_NOT_STATE(QNativeSocketEngine::waitForRead(),
                      QAbstractSocket::UnconnectedState, false);

    if (timedOut)
        *timedOut = false;

    QElapsedTimer timer;
    timer.start();
    while (msecs > timer.elapsed()) {
        // Servers with active connections are ready for reading
        if (!d->currentConnections.isEmpty())
            return true;

        // If we are a client, we are ready to read if our buffer has data
        QMutexLocker locker(&d->readMutex);
        if (!d->readBytes.atEnd())
            return true;

        // Nothing to do, wait for more events
        d->eventLoop.processEvents();
    }

    d->setError(QAbstractSocket::SocketTimeoutError,
                QNativeSocketEnginePrivate::TimeOutErrorString);

    if (timedOut)
        *timedOut = true;
    return false;
}

bool QNativeSocketEngine::waitForWrite(int msecs, bool *timedOut)
{
    Q_UNUSED(msecs);
    Q_UNUSED(timedOut);
    Q_D(QNativeSocketEngine);
    if (d->socketState == QAbstractSocket::ConnectingState) {
        HRESULT hr = QWinRTFunctions::await(d->connectOp, QWinRTFunctions::ProcessMainThreadEvents);
        if (SUCCEEDED(hr)) {
            d->handleConnectOpFinished(d->connectOp.Get(), Completed);
            return true;
        }
    }
    return false;
}

bool QNativeSocketEngine::waitForReadOrWrite(bool *readyToRead, bool *readyToWrite, bool checkRead, bool checkWrite, int msecs, bool *timedOut)
{
    Q_UNUSED(readyToRead);
    Q_UNUSED(readyToWrite);
    Q_UNUSED(checkRead);
    Q_UNUSED(checkWrite);
    Q_UNUSED(msecs);
    Q_UNUSED(timedOut);
    return false;
}

bool QNativeSocketEngine::isReadNotificationEnabled() const
{
    Q_D(const QNativeSocketEngine);
    return d->notifyOnRead;
}

void QNativeSocketEngine::setReadNotificationEnabled(bool enable)
{
    Q_D(QNativeSocketEngine);
    d->notifyOnRead = enable;
}

bool QNativeSocketEngine::isWriteNotificationEnabled() const
{
    Q_D(const QNativeSocketEngine);
    return d->notifyOnWrite;
}

void QNativeSocketEngine::setWriteNotificationEnabled(bool enable)
{
    Q_D(QNativeSocketEngine);
    d->notifyOnWrite = enable;
    if (enable && d->socketState == QAbstractSocket::ConnectedState) {
        if (bytesToWrite())
            return; // will be emitted as a result of bytes written
        writeNotification();
    }
}

bool QNativeSocketEngine::isExceptionNotificationEnabled() const
{
    Q_D(const QNativeSocketEngine);
    return d->notifyOnException;
}

void QNativeSocketEngine::setExceptionNotificationEnabled(bool enable)
{
    Q_D(QNativeSocketEngine);
    d->notifyOnException = enable;
}

void QNativeSocketEngine::establishRead()
{
    Q_D(QNativeSocketEngine);

    HRESULT hr;
    hr = QEventDispatcherWinRT::runOnXamlThread([d]() {
        ComPtr<IInputStream> stream;
        HRESULT hr = d->tcpSocket()->get_InputStream(&stream);
        RETURN_HR_IF_FAILED("establishRead(): Failed to get socket input stream");

        ComPtr<IBuffer> buffer;
        hr = g->bufferFactory->Create(READ_BUFFER_SIZE, &buffer);
        RETURN_HR_IF_FAILED("establishRead(): Failed to create buffer");

        hr = stream->ReadAsync(buffer.Get(), READ_BUFFER_SIZE, InputStreamOptions_Partial, &d->readOp);
        RETURN_HR_IF_FAILED("establishRead(): Failed to initiate socket read");
        hr = d->readOp->put_Completed(Callback<SocketReadCompletedHandler>(d, &QNativeSocketEnginePrivate::handleReadyRead).Get());
        RETURN_HR_IF_FAILED("establishRead(): Failed to register read callback");
        return S_OK;
    });
    Q_ASSERT_SUCCEEDED(hr);
}

bool QNativeSocketEnginePrivate::createNewSocket(QAbstractSocket::SocketType socketType, QAbstractSocket::NetworkLayerProtocol &socketProtocol)
{
    Q_UNUSED(socketProtocol);
    HRESULT hr;

    switch (socketType) {
    case QAbstractSocket::TcpSocket: {
        ComPtr<IStreamSocket> socket;
        hr = RoActivateInstance(HString::MakeReference(RuntimeClass_Windows_Networking_Sockets_StreamSocket).Get(), &socket);
        RETURN_FALSE_IF_FAILED("createNewSocket: Could not create socket instance");
        socketDescriptor = qintptr(socket.Detach());
        break;
    }
    case QAbstractSocket::UdpSocket: {
        ComPtr<IDatagramSocket> socket;
        hr = RoActivateInstance(HString::MakeReference(RuntimeClass_Windows_Networking_Sockets_DatagramSocket).Get(), &socket);
        RETURN_FALSE_IF_FAILED("createNewSocket: Could not create socket instance");
        socketDescriptor = qintptr(socket.Detach());
        QEventDispatcherWinRT::runOnXamlThread([&hr, this]() {
            hr = udpSocket()->add_MessageReceived(Callback<DatagramReceivedHandler>(this, &QNativeSocketEnginePrivate::handleNewDatagram).Get(), &connectionToken);
            RETURN_OK_IF_FAILED("createNewSocket: Could not add \"message received\" callback")
            return S_OK;
        });
        if (FAILED(hr))
            return false;
        break;
    }
    default:
        qWarning("Invalid socket type");
        return false;
    }

    this->socketType = socketType;

    // Make the socket nonblocking.
    if (!setOption(QAbstractSocketEngine::NonBlockingSocketOption, 1)) {
        setError(QAbstractSocket::UnsupportedSocketOperationError, NonBlockingInitFailedErrorString);
        q_func()->close();
        return false;
    }

    return true;
}

QNativeSocketEnginePrivate::QNativeSocketEnginePrivate()
    : QAbstractSocketEnginePrivate()
    , notifyOnRead(true)
    , notifyOnWrite(true)
    , notifyOnException(false)
    , closingDown(false)
    , socketDescriptor(-1)
    , sslSocket(Q_NULLPTR)
    , connectionToken( { -1 } )
{
}

QNativeSocketEnginePrivate::~QNativeSocketEnginePrivate()
{
    if (socketDescriptor == -1 || connectionToken.value == -1)
        return;

    HRESULT hr;
    if (socketType == QAbstractSocket::UdpSocket)
        hr = udpSocket()->remove_MessageReceived(connectionToken);
    else if (socketType == QAbstractSocket::TcpSocket)
        hr = tcpListener->remove_ConnectionReceived(connectionToken);
    Q_ASSERT_SUCCEEDED(hr);
}

void QNativeSocketEnginePrivate::setError(QAbstractSocket::SocketError error, ErrorString errorString) const
{
    if (hasSetSocketError) {
        // Only set socket errors once for one engine; expect the
        // socket to recreate its engine after an error. Note: There's
        // one exception: SocketError(11) bypasses this as it's purely
        // a temporary internal error condition.
        // Another exception is the way the waitFor*() functions set
        // an error when a timeout occurs. After the call to setError()
        // they reset the hasSetSocketError to false
        return;
    }
    if (error != QAbstractSocket::SocketError(11))
        hasSetSocketError = true;

    socketError = error;

    switch (errorString) {
    case NonBlockingInitFailedErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unable to initialize non-blocking socket");
        break;
    case BroadcastingInitFailedErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unable to initialize broadcast socket");
        break;
    // should not happen anymore
    case NoIpV6ErrorString:
        socketErrorString = QNativeSocketEngine::tr("Attempt to use IPv6 socket on a platform with no IPv6 support");
        break;
    case RemoteHostClosedErrorString:
        socketErrorString = QNativeSocketEngine::tr("The remote host closed the connection");
        break;
    case TimeOutErrorString:
        socketErrorString = QNativeSocketEngine::tr("Network operation timed out");
        break;
    case ResourceErrorString:
        socketErrorString = QNativeSocketEngine::tr("Out of resources");
        break;
    case OperationUnsupportedErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unsupported socket operation");
        break;
    case ProtocolUnsupportedErrorString:
        socketErrorString = QNativeSocketEngine::tr("Protocol type not supported");
        break;
    case InvalidSocketErrorString:
        socketErrorString = QNativeSocketEngine::tr("Invalid socket descriptor");
        break;
    case HostUnreachableErrorString:
        socketErrorString = QNativeSocketEngine::tr("Host unreachable");
        break;
    case NetworkUnreachableErrorString:
        socketErrorString = QNativeSocketEngine::tr("Network unreachable");
        break;
    case AccessErrorString:
        socketErrorString = QNativeSocketEngine::tr("Permission denied");
        break;
    case ConnectionTimeOutErrorString:
        socketErrorString = QNativeSocketEngine::tr("Connection timed out");
        break;
    case ConnectionRefusedErrorString:
        socketErrorString = QNativeSocketEngine::tr("Connection refused");
        break;
    case AddressInuseErrorString:
        socketErrorString = QNativeSocketEngine::tr("The bound address is already in use");
        break;
    case AddressNotAvailableErrorString:
        socketErrorString = QNativeSocketEngine::tr("The address is not available");
        break;
    case AddressProtectedErrorString:
        socketErrorString = QNativeSocketEngine::tr("The address is protected");
        break;
    case DatagramTooLargeErrorString:
        socketErrorString = QNativeSocketEngine::tr("Datagram was too large to send");
        break;
    case SendDatagramErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unable to send a message");
        break;
    case ReceiveDatagramErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unable to receive a message");
        break;
    case WriteErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unable to write");
        break;
    case ReadErrorString:
        socketErrorString = QNativeSocketEngine::tr("Network error");
        break;
    case PortInuseErrorString:
        socketErrorString = QNativeSocketEngine::tr("Another socket is already listening on the same port");
        break;
    case NotSocketErrorString:
        socketErrorString = QNativeSocketEngine::tr("Operation on non-socket");
        break;
    case InvalidProxyTypeString:
        socketErrorString = QNativeSocketEngine::tr("The proxy type is invalid for this operation");
        break;
    case TemporaryErrorString:
        socketErrorString = QNativeSocketEngine::tr("Temporary error");
        break;
    case UnknownSocketErrorString:
        socketErrorString = QNativeSocketEngine::tr("Unknown error");
        break;
    }
}

int QNativeSocketEnginePrivate::option(QAbstractSocketEngine::SocketOption opt) const
{
    ComPtr<IStreamSocketControl> control;
    if (socketType == QAbstractSocket::TcpSocket) {
        if (FAILED(tcpSocket()->get_Control(&control))) {
            qWarning("QNativeSocketEnginePrivate::option: Could not obtain socket control");
            return -1;
        }
    }
    switch (opt) {
    case QAbstractSocketEngine::NonBlockingSocketOption:
    case QAbstractSocketEngine::BroadcastSocketOption:
    case QAbstractSocketEngine::ReceiveOutOfBandData:
        return 1;
    case QAbstractSocketEngine::SendBufferSocketOption:
        if (socketType == QAbstractSocket::UdpSocket)
            return -1;

        UINT32 bufferSize;
        if (FAILED(control->get_OutboundBufferSizeInBytes(&bufferSize))) {
            qWarning("Could not obtain OutboundBufferSizeInBytes information vom socket control");
            return -1;
        }
        return bufferSize;
    case QAbstractSocketEngine::LowDelayOption:
        if (socketType == QAbstractSocket::UdpSocket)
            return -1;

        boolean noDelay;
        if (FAILED(control->get_NoDelay(&noDelay))) {
            qWarning("Could not obtain NoDelay information from socket control");
            return -1;
        }
        return noDelay;
    case QAbstractSocketEngine::KeepAliveOption:
        if (socketType == QAbstractSocket::UdpSocket)
            return -1;

        boolean keepAlive;
        if (FAILED(control->get_KeepAlive(&keepAlive))) {
            qWarning("Could not obtain KeepAlive information from socket control");
            return -1;
        }
        return keepAlive;
    case QAbstractSocketEngine::ReceiveBufferSocketOption:
    case QAbstractSocketEngine::AddressReusable:
    case QAbstractSocketEngine::BindExclusively:
    case QAbstractSocketEngine::MulticastTtlOption:
    case QAbstractSocketEngine::MulticastLoopbackOption:
    case QAbstractSocketEngine::TypeOfServiceOption:
    default:
        return -1;
    }
    return -1;
}

bool QNativeSocketEnginePrivate::setOption(QAbstractSocketEngine::SocketOption opt, int v)
{
    ComPtr<IStreamSocketControl> control;
    if (socketType == QAbstractSocket::TcpSocket) {
        if (FAILED(tcpSocket()->get_Control(&control))) {
            qWarning("QNativeSocketEnginePrivate::setOption: Could not obtain socket control");
            return false;
        }
    }
    switch (opt) {
    case QAbstractSocketEngine::NonBlockingSocketOption:
    case QAbstractSocketEngine::BroadcastSocketOption:
    case QAbstractSocketEngine::ReceiveOutOfBandData:
        return v != 0;
    case QAbstractSocketEngine::SendBufferSocketOption:
        if (socketType == QAbstractSocket::UdpSocket)
            return false;

        if (FAILED(control->put_OutboundBufferSizeInBytes(v))) {
            qWarning("Could not set OutboundBufferSizeInBytes");
            return false;
        }
        return true;
    case QAbstractSocketEngine::LowDelayOption: {
        if (socketType == QAbstractSocket::UdpSocket)
            return false;

        boolean noDelay = v;
        if (FAILED(control->put_NoDelay(noDelay))) {
            qWarning("Could not obtain NoDelay information from socket control");
            return false;
        }
        return true;
    }
    case QAbstractSocketEngine::KeepAliveOption: {
        if (socketType == QAbstractSocket::UdpSocket
                || socketState != QAbstractSocket::UnconnectedState)
            return false;

        boolean keepAlive = v;
        if (FAILED(control->put_KeepAlive(keepAlive))) {
            qWarning("Could not set KeepAlive value");
            return false;
        }
        return true;
    }
    case QAbstractSocketEngine::ReceiveBufferSocketOption:
    case QAbstractSocketEngine::AddressReusable:
    case QAbstractSocketEngine::BindExclusively:
    case QAbstractSocketEngine::MulticastTtlOption:
    case QAbstractSocketEngine::MulticastLoopbackOption:
    case QAbstractSocketEngine::TypeOfServiceOption:
    default:
        return false;
    }
    return false;
}

bool QNativeSocketEnginePrivate::fetchConnectionParameters()
{
    localPort = 0;
    localAddress.clear();
    peerPort = 0;
    peerAddress.clear();

    HRESULT hr;
    if (socketType == QAbstractSocket::TcpSocket) {
        ComPtr<IHostName> hostName;
        HString tmpHString;
        ComPtr<IStreamSocketInformation> info;
        hr = tcpSocket()->get_Information(&info);
        Q_ASSERT_SUCCEEDED(hr);
        hr = info->get_LocalAddress(&hostName);
        Q_ASSERT_SUCCEEDED(hr);
        if (hostName) {
            hr = hostName->get_CanonicalName(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            localAddress.setAddress(qt_QStringFromHString(tmpHString));
            hr = info->get_LocalPort(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            localPort = qt_QStringFromHString(tmpHString).toInt();
        }
        if (!localPort && tcpListener) {
            ComPtr<IStreamSocketListenerInformation> listenerInfo = 0;
            hr = tcpListener->get_Information(&listenerInfo);
            Q_ASSERT_SUCCEEDED(hr);
            hr = listenerInfo->get_LocalPort(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            localPort = qt_QStringFromHString(tmpHString).toInt();
            localAddress = QHostAddress::Any;
        }
        info->get_RemoteAddress(&hostName);
        if (hostName) {
            hr = hostName->get_CanonicalName(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            peerAddress.setAddress(qt_QStringFromHString(tmpHString));
            hr = info->get_RemotePort(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            peerPort = qt_QStringFromHString(tmpHString).toInt();
        }
    } else if (socketType == QAbstractSocket::UdpSocket) {
        ComPtr<IHostName> hostName;
        HString tmpHString;
        ComPtr<IDatagramSocketInformation> info;
        hr = udpSocket()->get_Information(&info);
        Q_ASSERT_SUCCEEDED(hr);
        hr = info->get_LocalAddress(&hostName);
        Q_ASSERT_SUCCEEDED(hr);
        if (hostName) {
            hr = hostName->get_CanonicalName(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            localAddress.setAddress(qt_QStringFromHString(tmpHString));
            hr = info->get_LocalPort(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            localPort = qt_QStringFromHString(tmpHString).toInt();
        }

        hr = info->get_RemoteAddress(&hostName);
        Q_ASSERT_SUCCEEDED(hr);
        if (hostName) {
            hr = hostName->get_CanonicalName(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            peerAddress.setAddress(qt_QStringFromHString(tmpHString));
            hr = info->get_RemotePort(tmpHString.GetAddressOf());
            Q_ASSERT_SUCCEEDED(hr);
            peerPort = qt_QStringFromHString(tmpHString).toInt();
        }
    }
    return true;
}

HRESULT QNativeSocketEnginePrivate::handleClientConnection(IStreamSocketListener *listener, IStreamSocketListenerConnectionReceivedEventArgs *args)
{
    Q_Q(QNativeSocketEngine);
    Q_UNUSED(listener)
    IStreamSocket *socket;
    args->get_Socket(&socket);
    pendingConnections.append(socket);
    emit q->connectionReady();
    if (notifyOnRead)
        emit q->readReady();
    return S_OK;
}

HRESULT QNativeSocketEnginePrivate::handleConnectOpFinished(IAsyncAction *action, AsyncStatus)
{
    Q_Q(QNativeSocketEngine);
    if (wasDeleted || !connectOp) // Protect against a late callback
        return S_OK;

    HRESULT hr = action->GetResults();
    switch (hr) {
    case 0x8007274c: // A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
        setError(QAbstractSocket::NetworkError, ConnectionTimeOutErrorString);
        socketState = QAbstractSocket::UnconnectedState;
        return S_OK;
    case 0x80072751: // A socket operation was attempted to an unreachable host.
        setError(QAbstractSocket::HostNotFoundError, HostUnreachableErrorString);
        socketState = QAbstractSocket::UnconnectedState;
        return S_OK;
    case 0x8007274d: // No connection could be made because the target machine actively refused it.
        setError(QAbstractSocket::ConnectionRefusedError, ConnectionRefusedErrorString);
        socketState = QAbstractSocket::UnconnectedState;
        return S_OK;
    default:
        if (FAILED(hr)) {
            setError(QAbstractSocket::UnknownSocketError, UnknownSocketErrorString);
            socketState = QAbstractSocket::UnconnectedState;
            return S_OK;
        }
    }

    // The callback might be triggered several times if we do not cancel/reset it here
    if (connectOp) {
        ComPtr<IAsyncInfo> info;
        hr = connectOp.As(&info);
        Q_ASSERT_SUCCEEDED(hr);
        if (info) {
            hr = info->Cancel();
            Q_ASSERT_SUCCEEDED(hr);
            hr = info->Close();
            Q_ASSERT_SUCCEEDED(hr);
        }
        hr = connectOp.Reset();
        Q_ASSERT_SUCCEEDED(hr);
    }

    socketState = QAbstractSocket::ConnectedState;
    emit q->connectionReady();

    if (socketType != QAbstractSocket::TcpSocket)
        return S_OK;

    // Delay the reader so that the SSL socket can upgrade
    if (sslSocket)
        QObject::connect(qobject_cast<QSslSocket *>(sslSocket), &QSslSocket::encrypted, q, &QNativeSocketEngine::establishRead);
    else
        q->establishRead();
    return S_OK;
}

HRESULT QNativeSocketEnginePrivate::handleReadyRead(IAsyncBufferOperation *asyncInfo, AsyncStatus status)
{
    if (closingDown || wasDeleted || isDeletingChildren
            || socketState == QAbstractSocket::UnconnectedState) {
        return S_OK;
    }

    Q_Q(QNativeSocketEngine);

    // A read in UnconnectedState will close the socket and return -1 and thus tell the caller,
    // that the connection was closed. The socket cannot be closed here, as the subsequent read
    // might fail then.
    if (status == Error || status == Canceled) {
        setError(QAbstractSocket::RemoteHostClosedError, RemoteHostClosedErrorString);
        socketState = QAbstractSocket::UnconnectedState;
        if (notifyOnRead)
            emit q->readReady();
        return S_OK;
    }

    ComPtr<IBuffer> buffer;
    HRESULT hr = asyncInfo->GetResults(&buffer);
    RETURN_OK_IF_FAILED("Failed to get read results buffer");

    UINT32 bufferLength;
    hr = buffer->get_Length(&bufferLength);
    Q_ASSERT_SUCCEEDED(hr);
    // A zero sized buffer length signals, that the remote host closed the connection. The socket
    // cannot be closed though, as the following read might have socket descriptor -1 and thus and
    // the closing of the socket won't be communicated to the caller. So only the error is set. The
    // actual socket close happens inside of read.
    if (!bufferLength) {
        setError(QAbstractSocket::RemoteHostClosedError, RemoteHostClosedErrorString);
        socketState = QAbstractSocket::UnconnectedState;
        if (notifyOnRead)
            emit q->readReady();
        return S_OK;
    }

    ComPtr<Windows::Storage::Streams::IBufferByteAccess> byteArrayAccess;
    hr = buffer.As(&byteArrayAccess);
    Q_ASSERT_SUCCEEDED(hr);
    byte *data;
    hr = byteArrayAccess->Buffer(&data);
    Q_ASSERT_SUCCEEDED(hr);

    readMutex.lock();
    if (readBytes.atEnd()) // Everything has been read; the buffer is safe to reset
        readBytes.close();
    if (!readBytes.isOpen())
        readBytes.open(QBuffer::ReadWrite|QBuffer::Truncate);
    qint64 readPos = readBytes.pos();
    readBytes.seek(readBytes.size());
    Q_ASSERT(readBytes.atEnd());
    readBytes.write(reinterpret_cast<const char*>(data), qint64(bufferLength));
    readBytes.seek(readPos);
    readMutex.unlock();

    if (notifyOnRead)
        emit q->readReady();

    hr = QEventDispatcherWinRT::runOnXamlThread([buffer, q, this]() {
        UINT32 readBufferLength;
        ComPtr<IInputStream> stream;
        HRESULT hr = tcpSocket()->get_InputStream(&stream);
        RETURN_HR_IF_FAILED("handleReadyRead(): Could not obtain input stream");

        // Reuse the stream buffer
        hr = buffer->get_Capacity(&readBufferLength);
        RETURN_HR_IF_FAILED("handleReadyRead(): Could not obtain buffer capacity");
        hr = buffer->put_Length(0);
        RETURN_HR_IF_FAILED("handleReadyRead(): Could not set buffer length");

        hr = stream->ReadAsync(buffer.Get(), readBufferLength, InputStreamOptions_Partial, &readOp);
        if (FAILED(hr)) {
            qErrnoWarning(hr, "handleReadyRead(): Could not read into socket stream buffer (%s).",
                          socketDescription(q).constData());
            return S_OK;
        }
        hr = readOp->put_Completed(Callback<SocketReadCompletedHandler>(this, &QNativeSocketEnginePrivate::handleReadyRead).Get());
        if (FAILED(hr)) {
            qErrnoWarning(hr, "handleReadyRead(): Failed to set socket read callback (%s).",
                          socketDescription(q).constData());
            return S_OK;
        }
        return S_OK;
    });
    Q_ASSERT_SUCCEEDED(hr);
    return S_OK;
}

HRESULT QNativeSocketEnginePrivate::handleNewDatagram(IDatagramSocket *socket, IDatagramSocketMessageReceivedEventArgs *args)
{
    Q_Q(QNativeSocketEngine);
    Q_UNUSED(socket);

    WinRtDatagram datagram;
    QHostAddress returnAddress;
    ComPtr<IHostName> remoteHost;
    HRESULT hr = args->get_RemoteAddress(&remoteHost);
    RETURN_OK_IF_FAILED("Could not obtain remote host");
    HString remoteHostString;
    remoteHost->get_CanonicalName(remoteHostString.GetAddressOf());
    RETURN_OK_IF_FAILED("Could not obtain remote host's canonical name");
    returnAddress.setAddress(qt_QStringFromHString(remoteHostString));
    datagram.header.senderAddress = returnAddress;
    HString remotePort;
    hr = args->get_RemotePort(remotePort.GetAddressOf());
    RETURN_OK_IF_FAILED("Could not obtain remote port");
    datagram.header.senderPort = qt_QStringFromHString(remotePort).toInt();

    ComPtr<IDataReader> reader;
    hr = args->GetDataReader(&reader);
    RETURN_OK_IF_FAILED("Could not obtain data reader");
    quint32 length;
    hr = reader->get_UnconsumedBufferLength(&length);
    RETURN_OK_IF_FAILED("Could not obtain unconsumed buffer length");
    datagram.data.resize(length);
    hr = reader->ReadBytes(length, reinterpret_cast<BYTE *>(datagram.data.data()));
    RETURN_OK_IF_FAILED("Could not read datagram");
    pendingDatagrams.append(datagram);
    if (notifyOnRead)
        emit q->readReady();

    return S_OK;
}

QT_END_NAMESPACE