summaryrefslogtreecommitdiffstats
path: root/ui/qt/lte_mac_statistics_dialog.cpp
blob: 691128ea2102f7fcf7bde450dfcab7e5e1236a38 (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
/* lte_mac_statistics_dialog.cpp
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "lte_mac_statistics_dialog.h"

#include <epan/packet.h>
#include <epan/strutil.h>
#include <epan/tap.h>

#include <epan/dissectors/packet-mac-lte.h>

#include <QFormLayout>
#include <QTreeWidgetItem>

#include <ui/qt/models/percent_bar_delegate.h>
#include "main_application.h"

// TODO: have never tested in a live capture.

// Whole-UE headings.
enum {
    col_rnti_,
    col_type_,
    col_ueid_,
    // UL-specific
    col_ul_frames_,
    col_ul_bytes_,
    col_ul_mb_s_,
    col_ul_padding_percent_,
    /* col_ul_crc_failed_, */
    col_ul_retx_,
    // DL-specific
    col_dl_frames_,
    col_dl_bytes_,
    col_dl_mb_s_,
    col_dl_padding_percent_,
    col_dl_crc_failed_,
    col_dl_retx_
};


// Type of tree item, so can set column headings properly.
enum {
    mac_whole_ue_row_type_ = 1000,
    mac_ulsch_packet_count_row_type,
    mac_ulsch_byte_count_row_type,
    mac_dlsch_packet_count_row_type,
    mac_dlsch_byte_count_row_type
};

// Calculate and return a bandwidth figure, in Mbs
static double calculate_bw(const nstime_t *start_time, const nstime_t *stop_time,
                           guint32 bytes)
{
    // Can only calculate bandwidth if have time delta
    if (memcmp(start_time, stop_time, sizeof(nstime_t)) != 0) {
        double elapsed_ms = (((double)stop_time->secs -  start_time->secs) * 1000) +
                            (((double)stop_time->nsecs - start_time->nsecs) / 1000000);

        // Only really meaningful if have a few frames spread over time...
        // For now at least avoid dividing by something very close to 0.0
        if (elapsed_ms < 2.0) {
           return 0.0f;
        }

        // N.B. very small values will display as scientific notation, but rather that than show 0
        // when there is some traffic..
        return ((bytes * 8) / elapsed_ms) / 1000;
    }
    else {
        return 0.0f;
    }
}


// Channels (by LCID) data node. Used for UL/DL frames/bytes.
class MacULDLTreeWidgetItem : public QTreeWidgetItem
{
public:
    MacULDLTreeWidgetItem(QTreeWidgetItem *parent, unsigned ueid, unsigned rnti, int row_type) :
        QTreeWidgetItem (parent, row_type),
        ueid_(ueid),
        rnti_(rnti)
    {
        // Init values held for all lcids to 0.
        for (int n=0; n < MAC_LTE_DATA_LCID_COUNT_MAX; n++) {
            lcids[n] = 0;
        }

        // Set first column to show what counts in this row mean.
        switch (row_type) {
            case mac_ulsch_packet_count_row_type:
                setText(col_rnti_, "UL Packets");
                break;
            case mac_ulsch_byte_count_row_type:
                setText(col_rnti_, "UL Bytes");
                break;
            case mac_dlsch_packet_count_row_type:
                setText(col_rnti_, "DL Packets");
                break;
            case mac_dlsch_byte_count_row_type:
                setText(col_rnti_, "DL Bytes");
                break;
            default:
                // Should never get here...
                break;
        }
    }

    bool operator< (const QTreeWidgetItem &other) const
    {
        // We want rows with a UE to appear in the order they appear in the row_type enum.
        return type() < other.type();
    }

    void draw()
    {
        // Show current value of counter for each LCID.
        // N.B. fields that are set as % using percent_bar_delegate.h
        // for UE headings don't display here...
        for (int n=0; n < MAC_LTE_DATA_LCID_COUNT_MAX; n++) {
            setText(col_type_+n, QString::number((uint)lcids[n]));
        }
    }

    // Increase value held for lcid by given value.
    void updateLCID(guint8 lcid, guint value)
    {
        lcids[lcid] += value;
    }

    // Generate expression for this UE and direction, also filter for SRs and RACH if indicated.
    const QString filterExpression(bool showSR, bool showRACH) {
        int direction = (type() == mac_dlsch_packet_count_row_type) ||
                        (type() == mac_dlsch_byte_count_row_type);

        QString filter_expr;

        if (showSR) {
            filter_expr = QString("(mac-lte.sr-req and mac-lte.ueid == %1) or (").arg(ueid_);
        }

        if (showRACH) {
            filter_expr += QString("(mac-lte.rar or (mac-lte.preamble-sent and mac-lte.ueid == %1)) or (").arg(ueid_);
        }

        // Main expression matching this UE and direction
        filter_expr += QString("mac-lte.ueid==%1 && mac-lte.rnti==%2 && mac-lte.direction==%3").
                              arg(ueid_).arg(rnti_).arg(direction);

        // Close () if open because of SR
        if (showSR) {
            filter_expr += QString(")");
        }
        // Close () if open because of RACH
        if (showRACH) {
            filter_expr += QString(")");
        }

        return filter_expr;
    }

    // Not showing anything for individual channels.  Headings are different than from UEs, and
    // trying to show both would be too confusing.
    QList<QVariant> rowData() const
    {
        return QList<QVariant>();
    }

private:
    unsigned ueid_;
    unsigned rnti_;
    int lcids[MAC_LTE_DATA_LCID_COUNT_MAX]; /* 0 to 10 and 32 to 38 */
};



// Whole UE tree item
class MacUETreeWidgetItem : public QTreeWidgetItem
{
public:
    MacUETreeWidgetItem(QTreeWidget *parent, const mac_lte_tap_info *mlt_info) :
        QTreeWidgetItem (parent, mac_whole_ue_row_type_),
        rnti_(0),
        type_(0),
        ueid_(0),
        ul_frames_(0),
        ul_bytes_(0),
        ul_raw_bytes_(0),
        ul_padding_bytes_(0),
        ul_retx_(0),
        dl_frames_(0),
        dl_bytes_(0),
        dl_raw_bytes_(0),
        dl_padding_bytes_(0),
        dl_crc_failed_(0),
        dl_retx_(0)
    {
        // Set fixed fields.
        rnti_ = mlt_info->rnti;
        type_ = mlt_info->rntiType;
        ueid_ = mlt_info->ueid;
        setText(col_rnti_, QString::number(rnti_));
        setText(col_type_, type_ == C_RNTI ? QObject::tr("C-RNTI") : QObject::tr("SPS-RNTI"));
        setText(col_ueid_, QString::number(ueid_));

        // Add UL/DL packet/byte count subitems.
        addDetails();
    }

    // Does this tap-info match this existing UE item?
    bool isMatch(const mac_lte_tap_info *mlt_info) {
        return ((rnti_ == mlt_info->rnti) &&
                (type_ == mlt_info->rntiType) &&
                (ueid_ == mlt_info->ueid));
    }

    // Update this UE according to the tap info
    void update(const mac_lte_tap_info *mlt_info) {

        // Uplink.
        if (mlt_info->direction == DIRECTION_UPLINK) {
            if (mlt_info->isPHYRetx) {
                ul_retx_++;
                return;
            }

            if (mlt_info->crcStatusValid && (mlt_info->crcStatus != crc_success)) {
                // TODO: there is not a column for this...
                //ul_crc_errors_++;
                return;
            }

            // Update time range
            if (ul_frames_ == 0) {
                ul_time_start_ = mlt_info->mac_lte_time;
            }
            ul_time_stop_ = mlt_info->mac_lte_time;

            ul_frames_++;

            // These values needed for padding % calculation.
            ul_raw_bytes_ += mlt_info->raw_length;
            ul_padding_bytes_ += mlt_info->padding_bytes;

            // N.B. Not going to support predefined data in Qt version..
            if (!mlt_info->isPredefinedData) {
                for (int n=0; n < MAC_LTE_DATA_LCID_COUNT_MAX; n++) {
                    // Update UL child items
                    ul_frames_item_->updateLCID(n, mlt_info->sdus_for_lcid[n]);
                    ul_bytes_item_->updateLCID(n, mlt_info->bytes_for_lcid[n]);

                    ul_bytes_ += mlt_info->bytes_for_lcid[n];
                }
            }
        }

        // Downlink
        else {
            if (mlt_info->isPHYRetx) {
                dl_retx_++;
                return;
            }

            if (mlt_info->crcStatusValid && (mlt_info->crcStatus != crc_success)) {
                switch (mlt_info->crcStatus) {
                    case crc_fail:
                        dl_crc_failed_++;
                        break;

                    default:
                        // Not a reason we currently care about.
                        break;
                }
                return;
            }

            // Update time range
            if (dl_frames_ == 0) {
                dl_time_start_ = mlt_info->mac_lte_time;
            }
            dl_time_stop_ = mlt_info->mac_lte_time;

            dl_frames_++;

            // These values needed for padding % calculation.
            dl_raw_bytes_ += mlt_info->raw_length;
            dl_padding_bytes_ += mlt_info->padding_bytes;

            // N.B. Not going to support predefined data in Qt version..
            if (!mlt_info->isPredefinedData) {
                for (int n=0; n < MAC_LTE_DATA_LCID_COUNT_MAX; n++) {
                    // Update DL child items
                    dl_frames_item_->updateLCID(n, mlt_info->sdus_for_lcid[n]);
                    dl_bytes_item_->updateLCID(n, mlt_info->bytes_for_lcid[n]);

                    dl_bytes_ += mlt_info->bytes_for_lcid[n];
                }
            }
        }
    }

    void addDetails() {
        // Add UL/DL packet and byte counts.
        ul_frames_item_ = new MacULDLTreeWidgetItem(this,  ueid_, rnti_, mac_ulsch_packet_count_row_type);
        ul_bytes_item_ = new MacULDLTreeWidgetItem(this,  ueid_, rnti_, mac_ulsch_byte_count_row_type);
        dl_frames_item_ = new MacULDLTreeWidgetItem(this,  ueid_, rnti_, mac_dlsch_packet_count_row_type);
        dl_bytes_item_ = new MacULDLTreeWidgetItem(this,  ueid_, rnti_, mac_dlsch_byte_count_row_type);

        setExpanded(false);
    }

    // Draw this UE.
    void draw() {
        // Fixed fields (rnti, type, ueid) won't change during lifetime of UE entry.

        // Calculate bw now.
        double UL_bw = calculate_bw(&ul_time_start_,
                                    &ul_time_stop_,
                                    ul_bytes_);
        double DL_bw = calculate_bw(&dl_time_start_,
                                    &dl_time_stop_,
                                    dl_bytes_);

        // Set columns with current values.
        setText(col_ul_frames_, QString::number(ul_frames_));
        setText(col_ul_bytes_, QString::number(ul_bytes_));
        setText(col_ul_mb_s_, QString::number(UL_bw));
        setData(col_ul_padding_percent_, Qt::UserRole,
                QVariant::fromValue<double>(ul_raw_bytes_ ?
                                                (((double)ul_padding_bytes_ / (double)ul_raw_bytes_) * 100.0) :
                                                0.0));
        setText(col_ul_retx_, QString::number(ul_retx_));

        setText(col_dl_frames_, QString::number(dl_frames_));
        setText(col_dl_bytes_, QString::number(dl_bytes_));
        setText(col_dl_mb_s_, QString::number(DL_bw));

        setData(col_dl_padding_percent_, Qt::UserRole,
                QVariant::fromValue<double>(dl_raw_bytes_ ?
                                                (((double)dl_padding_bytes_ / (double)dl_raw_bytes_) * 100.0) :
                                                0.0));
        setText(col_dl_crc_failed_, QString::number(dl_crc_failed_));
        setText(col_dl_retx_, QString::number(dl_retx_));

        // Draw child items with per-channel counts.
        ul_frames_item_->draw();
        ul_bytes_item_->draw();
        dl_frames_item_->draw();
        dl_bytes_item_->draw();
    }

    // < operator.  Compare this item with another item, using the column we are currently sorting on.
    bool operator< (const QTreeWidgetItem &other) const
    {
        if (other.type() != mac_whole_ue_row_type_) return QTreeWidgetItem::operator< (other);
        const MacUETreeWidgetItem *other_row = static_cast<const MacUETreeWidgetItem *>(&other);

        switch (treeWidget()->sortColumn()) {
            case col_rnti_:
                return rnti_ < other_row->rnti_;
            case col_type_:
                return type_ < other_row->type_;
            case col_ueid_:
                return ueid_ < other_row->ueid_;
            // TODO: other fields?
            default:
                break;
        }

        return QTreeWidgetItem::operator< (other);
    }

    // Generate expression for this UE, also filter for SRs and RACH if indicated.
    const QString filterExpression(bool showSR, bool showRACH) {
        QString filter_expr;

        if (showSR) {
            filter_expr = QString("(mac-lte.sr-req and mac-lte.ueid == %1) or (").arg(ueid_);
        }

        if (showRACH) {
            filter_expr += QString("(mac-lte.rar or (mac-lte.preamble-sent and mac-lte.ueid == %1)) or (").arg(ueid_);
        }

        // Main expression matching this UE
        filter_expr += QString("mac-lte.ueid==%1 && mac-lte.rnti==%2").arg(ueid_).arg(rnti_);

        // Close () if open because of SR
        if (showSR) {
            filter_expr += QString(")");
        }
        // Close () if open because of RACH
        if (showRACH) {
            filter_expr += QString(")");
        }

        return filter_expr;
    }

    // Return the UE-specific fields.
    QList<QVariant> rowData() const
    {
        QList<QVariant> row_data;

        // Key fields
        row_data << rnti_ << (type_ == C_RNTI ? QObject::tr("C-RNTI") : QObject::tr("SPS-RNTI")) << ueid_;

        // UL
        row_data << ul_frames_ << ul_bytes_
                 << calculate_bw(&ul_time_start_, &ul_time_stop_, ul_bytes_)
                 << QVariant::fromValue<double>(ul_raw_bytes_ ?
                                                    (((double)ul_padding_bytes_ / (double)ul_raw_bytes_) * 100.0) :
                                                    0.0)
                 << ul_retx_;

        // DL
        row_data << dl_frames_ << dl_bytes_
                 << calculate_bw(&dl_time_start_, &dl_time_stop_, dl_bytes_)
                 << QVariant::fromValue<double>(dl_raw_bytes_ ?
                                                    (((double)dl_padding_bytes_ / (double)dl_raw_bytes_) * 100.0) :
                                                    0.0)
                 << dl_crc_failed_ << dl_retx_;
        return row_data;
    }

private:
    // Unchanging (key) fields.
    unsigned rnti_;
    unsigned type_;
    unsigned ueid_;

    // UL-specific.
    unsigned ul_frames_;
    unsigned ul_bytes_;
    unsigned ul_raw_bytes_;
    unsigned ul_padding_bytes_;
    nstime_t ul_time_start_;
    nstime_t ul_time_stop_;
    unsigned ul_retx_;

    // DL-specific.
    unsigned dl_frames_;
    unsigned dl_bytes_;
    unsigned dl_raw_bytes_;
    unsigned dl_padding_bytes_;
    nstime_t dl_time_start_;
    nstime_t dl_time_stop_;
    unsigned dl_crc_failed_;
    unsigned dl_retx_;

    // Child nodes storing per-lcid counts.
    MacULDLTreeWidgetItem *ul_frames_item_;
    MacULDLTreeWidgetItem *ul_bytes_item_;
    MacULDLTreeWidgetItem *dl_frames_item_;
    MacULDLTreeWidgetItem *dl_bytes_item_;
};




// Label headings. Show according to which type of tree item is currently selected.
static const QStringList mac_whole_ue_row_labels = QStringList()
        << QObject::tr("RNTI") << QObject::tr("Type") << QObject::tr("UEId")
        << QObject::tr("UL Frames") << QObject::tr("UL Bytes") << QObject::tr("UL MB/s")
        << QObject::tr("UL Padding %") << QObject::tr("UL Re TX")
        << QObject::tr("DL Frames") << QObject::tr("DL Bytes") << QObject::tr("DL MB/s")
        << QObject::tr("DL Padding %") << QObject::tr("DL CRC Failed")
        << QObject::tr("DL ReTX")
        // 'Blank out' Channel-level fields
        << QObject::tr("") << QObject::tr("") << QObject::tr("") << QObject::tr("") << QObject::tr("");

static const QStringList mac_channel_counts_labels = QStringList()
        << QObject::tr("") << QObject::tr("CCCH")
        << QObject::tr("LCID 1") << QObject::tr("LCID 2") << QObject::tr("LCID 3")
        << QObject::tr("LCID 4") << QObject::tr("LCID 5") << QObject::tr("LCID 6")
        << QObject::tr("LCID 7") << QObject::tr("LCID 8") << QObject::tr("LCID 9")
        << QObject::tr("LCID 10") << QObject::tr("LCID 32") << QObject::tr("LCID 33")
        << QObject::tr("LCID 34") << QObject::tr("LCID 35") << QObject::tr("LCID 36")
        << QObject::tr("LCID 37") << QObject::tr("LCID 38");



//------------------------------------------------------------------------------------------
// Dialog

// Constructor.
LteMacStatisticsDialog::LteMacStatisticsDialog(QWidget &parent, CaptureFile &cf, const char *filter) :
    TapParameterDialog(parent, cf, HELP_STATS_LTE_MAC_TRAFFIC_DIALOG),
    commonStatsCurrent_(false)
{
    setWindowSubtitle(tr("LTE Mac Statistics"));
    loadGeometry(parent.width() * 1, parent.height() * 3 / 4, "LTEMacStatisticsDialog");

    clearCommonStats();

    // Create common_stats_grid to appear just above the filter area.
    int statstree_layout_idx = verticalLayout()->indexOf(filterLayout()->widget());
    QGridLayout *common_stats_grid = new QGridLayout();
    // Insert into the vertical layout
    verticalLayout()->insertLayout(statstree_layout_idx, common_stats_grid);
    int one_em = fontMetrics().height();
    common_stats_grid->setColumnMinimumWidth(2, one_em * 2);
    common_stats_grid->setColumnStretch(2, 1);
    common_stats_grid->setColumnMinimumWidth(5, one_em * 2);
    common_stats_grid->setColumnStretch(5, 1);

    // Create statistics label.
    commonStatsLabel_ = new QLabel(this);
    commonStatsLabel_->setObjectName("statisticsLabel");
    commonStatsLabel_->setTextFormat(Qt::RichText);
    commonStatsLabel_->setTextInteractionFlags(Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse);
    common_stats_grid->addWidget(commonStatsLabel_);


    // Create a grid for filtering-related widgetsto also appear in layout.
    int filter_controls_layout_idx = verticalLayout()->indexOf(filterLayout()->widget());
    QGridLayout *filter_controls_grid = new QGridLayout();
    // Insert into the vertical layout
    verticalLayout()->insertLayout(filter_controls_layout_idx, filter_controls_grid);
    filter_controls_grid->setColumnMinimumWidth(2, one_em * 2);
    filter_controls_grid->setColumnStretch(2, 1);
    filter_controls_grid->setColumnMinimumWidth(5, one_em * 2);
    filter_controls_grid->setColumnStretch(5, 1);

    // Add individual controls into the grid
    showSRFilterCheckBox_ = new QCheckBox(tr("Include SR frames in filter"));
    filter_controls_grid->addWidget(showSRFilterCheckBox_);
    showRACHFilterCheckBox_ = new QCheckBox(tr("Include RACH frames in filter"));
    filter_controls_grid->addWidget(showRACHFilterCheckBox_);

    // Will set whole-UE headings originally.
    updateHeaderLabels();

    ul_delegate_ = new PercentBarDelegate();
    statsTreeWidget()->setItemDelegateForColumn(col_ul_padding_percent_, ul_delegate_);
    dl_delegate_ = new PercentBarDelegate();
    statsTreeWidget()->setItemDelegateForColumn(col_dl_padding_percent_, dl_delegate_);

    statsTreeWidget()->sortByColumn(col_rnti_, Qt::AscendingOrder);

    // Set up column widths.
    // resizeColumnToContents doesn't work well here, so set sizes manually.
    for (int col = 0; col < statsTreeWidget()->columnCount() - 1; col++) {
        switch (col) {
            case col_rnti_:
                statsTreeWidget()->setColumnWidth(col, one_em * 8);
                break;
            case col_ul_frames_:
                statsTreeWidget()->setColumnWidth(col, one_em * 5);
                break;
            case col_ul_bytes_:
                statsTreeWidget()->setColumnWidth(col, one_em * 5);
                break;
            case col_ul_mb_s_:
                statsTreeWidget()->setColumnWidth(col, one_em * 4);
                break;
            case col_ul_padding_percent_:
                statsTreeWidget()->setColumnWidth(col, one_em * 6);
                break;
            case col_ul_retx_:
                statsTreeWidget()->setColumnWidth(col, one_em * 6);
                break;
            case col_dl_frames_:
                statsTreeWidget()->setColumnWidth(col, one_em * 5);
                break;
            case col_dl_bytes_:
                statsTreeWidget()->setColumnWidth(col, one_em * 5);
                break;
            case col_dl_mb_s_:
                statsTreeWidget()->setColumnWidth(col, one_em * 4);
                break;
            case col_dl_padding_percent_:
                statsTreeWidget()->setColumnWidth(col, one_em * 6);
                break;
            case col_dl_crc_failed_:
                statsTreeWidget()->setColumnWidth(col, one_em * 6);
                break;
            case col_dl_retx_:
                statsTreeWidget()->setColumnWidth(col, one_em * 6);
                break;

            default:
                // The rest are numeric
                statsTreeWidget()->setColumnWidth(col, one_em * 4);
                statsTreeWidget()->headerItem()->setTextAlignment(col, Qt::AlignRight);
                break;
        }
    }

    addFilterActions();

    if (filter) {
        setDisplayFilter(filter);
    }

    // Set handler for when the tree item changes to set the appropriate labels.
    connect(statsTreeWidget(), &QTreeWidget::itemSelectionChanged,
            this, &LteMacStatisticsDialog::updateHeaderLabels);

    // Set handler for when display filter string is changed.
    connect(this, &LteMacStatisticsDialog::updateFilter,
            this, &LteMacStatisticsDialog::filterUpdated);
}

// Destructor.
LteMacStatisticsDialog::~LteMacStatisticsDialog()
{
    delete ul_delegate_;
    delete dl_delegate_;
}

// Update system/common counters, and redraw if changed.
void LteMacStatisticsDialog::updateCommonStats(const mac_lte_tap_info *tap_info)
{
    commonStats_.all_frames++;

    // For common channels, just update global counters
    switch (tap_info->rntiType) {
        case P_RNTI:
            commonStats_.pch_frames++;
            commonStats_.pch_bytes += tap_info->single_number_of_bytes;
            commonStats_.pch_paging_ids += tap_info->number_of_paging_ids;
            commonStatsCurrent_ = false;
            break;
        case SI_RNTI:
            commonStats_.sib_frames++;
            commonStats_.sib_bytes += tap_info->single_number_of_bytes;
            commonStatsCurrent_ = false;
            break;
        case NO_RNTI:
            commonStats_.mib_frames++;
            commonStatsCurrent_ = false;
            break;
        case RA_RNTI:
            commonStats_.rar_frames++;
            commonStats_.rar_entries += tap_info->number_of_rars;
            commonStatsCurrent_ = false;
            break;
        case C_RNTI:
        case SPS_RNTI:
            // UE-specific.
            break;

        default:
            // Error...
            return;
    }

    // Check max UEs/tti counter
    switch (tap_info->direction) {
        case DIRECTION_UPLINK:
            if (tap_info->ueInTTI > commonStats_.max_ul_ues_in_tti) {
                commonStats_.max_ul_ues_in_tti = tap_info->ueInTTI;
                commonStatsCurrent_ = false;
            }
            break;
        case DIRECTION_DOWNLINK:
            if (tap_info->ueInTTI > commonStats_.max_dl_ues_in_tti) {
                commonStats_.max_dl_ues_in_tti = tap_info->ueInTTI;
                commonStatsCurrent_ = false;
            }
            break;
    }
}

// Draw current common statistics by regenerating label with current values.
void LteMacStatisticsDialog::drawCommonStats()
{
    if (!commonStatsCurrent_) {
        QString stats_tables = "<html><head></head><body>\n";
        stats_tables += QString("<table>\n");
        stats_tables += QString("<tr><th align=\"left\">System</th> <td align=\"left\"> Max UL UEs/TTI=%1</td>").arg(commonStats_.max_ul_ues_in_tti);
        stats_tables += QString("<td align=\"left\">Max DL UEs/TTI=%1</td></tr>\n").arg(commonStats_.max_dl_ues_in_tti);

        stats_tables += QString("<tr><th align=\"left\">System broadcast</th><td align=\"left\">MIBs=%1</td>").arg(commonStats_.mib_frames);
        stats_tables += QString("<td align=\"left\">SIBs=%1 (%2 bytes)</td></tr>\n").arg(commonStats_.sib_frames).arg(commonStats_.sib_bytes);

        stats_tables += QString("<tr><th align=\"left\">RACH</th><td align=\"left\">RARs=%1 frames (%2 RARs)</td></tr>\n").
                                   arg(commonStats_.rar_frames).
                                   arg(commonStats_.rar_entries);

        stats_tables += QString("<tr><th align=\"left\">Paging</th><td align=\"left\">PCH=%1 (%2 bytes, %3 IDs)</td></tr>\n").
               arg(commonStats_.pch_frames).
               arg(commonStats_.pch_bytes).
               arg(commonStats_.pch_paging_ids);

        stats_tables += QString("</table>\n");
        stats_tables += "</body>\n";

        commonStatsLabel_->setText(stats_tables);

        commonStatsCurrent_ = true;
    }
}

void LteMacStatisticsDialog::clearCommonStats()
{
    memset(&commonStats_, 0, sizeof(commonStats_));
}

void LteMacStatisticsDialog::tapReset(void *ws_dlg_ptr)
{
    LteMacStatisticsDialog *ws_dlg = static_cast<LteMacStatisticsDialog *>(ws_dlg_ptr);
    if (!ws_dlg) {
        return;
    }

    ws_dlg->statsTreeWidget()->clear();
    ws_dlg->clearCommonStats();
}

//---------------------------------------------------------------------------------------
// Process tap info from a new packet.
// Returns TAP_PACKET_REDRAW if a redraw is needed, TAP_PACKET_DONT_REDRAW otherwise.
tap_packet_status LteMacStatisticsDialog::tapPacket(void *ws_dlg_ptr, struct _packet_info *, epan_dissect *, const void *mac_lte_tap_info_ptr, tap_flags_t)
{
    // Look up dialog and tap info.
    LteMacStatisticsDialog *ws_dlg = static_cast<LteMacStatisticsDialog *>(ws_dlg_ptr);
    const mac_lte_tap_info *mlt_info  = (const mac_lte_tap_info *) mac_lte_tap_info_ptr;
    if (!ws_dlg || !mlt_info) {
        return TAP_PACKET_DONT_REDRAW;
    }

    // Update common stats.
    ws_dlg->updateCommonStats(mlt_info);

    // Nothing more to do if tap entry isn't for a UE.
    if ((mlt_info->rntiType != C_RNTI) && (mlt_info->rntiType != SPS_RNTI)) {
        return TAP_PACKET_DONT_REDRAW;
    }

    // Look for an existing UE to match this tap info.
    MacUETreeWidgetItem *mac_ue_ti = NULL;
    for (int i = 0; i < ws_dlg->statsTreeWidget()->topLevelItemCount(); i++) {
        QTreeWidgetItem *ti = ws_dlg->statsTreeWidget()->topLevelItem(i);
        // Make sure we're looking at a UE entry
        if (ti->type() != mac_whole_ue_row_type_) {
            continue;
        }

        // See if current item matches tap.
        MacUETreeWidgetItem *cur_muds_ti = static_cast<MacUETreeWidgetItem*>(ti);
        if (cur_muds_ti->isMatch(mlt_info)) {
            mac_ue_ti = cur_muds_ti;
            break;
        }
    }

    // If don't find matching UE, create a new one.
    if (!mac_ue_ti) {
        mac_ue_ti = new MacUETreeWidgetItem(ws_dlg->statsTreeWidget(), mlt_info);
        for (int col = 0; col < ws_dlg->statsTreeWidget()->columnCount(); col++) {
            // int QTreeWidgetItem::textAlignment(int column) const
            // Returns the text alignment for the label in the given column.
            // Note: This function returns an int for historical reasons. It will be corrected to return Qt::Alignment in Qt 7.
            mac_ue_ti->setTextAlignment(col, static_cast<Qt::Alignment>(ws_dlg->statsTreeWidget()->headerItem()->textAlignment(col)));
        }
    }

    // Update the UE item with info from tap!
    mac_ue_ti->update(mlt_info);
    return TAP_PACKET_REDRAW;
}

// Return total number of frames tapped.
unsigned LteMacStatisticsDialog::getFrameCount()
{
    return commonStats_.all_frames;
}

void LteMacStatisticsDialog::tapDraw(void *ws_dlg_ptr)
{
    // Look up dialog.
    LteMacStatisticsDialog *ws_dlg = static_cast<LteMacStatisticsDialog *>(ws_dlg_ptr);
    if (!ws_dlg) {
        return;
    }

    // Go over all of the top-level items.
    for (int i = 0; i < ws_dlg->statsTreeWidget()->topLevelItemCount(); i++) {
        // Get item, make sure its of the whole-UE type.
        QTreeWidgetItem *ti = ws_dlg->statsTreeWidget()->topLevelItem(i);
        if (ti->type() != mac_whole_ue_row_type_) {
            continue;
        }

        // Tell the UE item to draw itself.
        MacUETreeWidgetItem *mac_ue_ti = static_cast<MacUETreeWidgetItem*>(ti);
        mac_ue_ti->draw();
    }

    ws_dlg->drawCommonStats();

    // Update title
    ws_dlg->setWindowSubtitle(QString("LTE Mac Statistics (%1 UEs, %2 frames)").
                                  arg(ws_dlg->statsTreeWidget()->topLevelItemCount()).arg(ws_dlg->getFrameCount()));
}

const QString LteMacStatisticsDialog::filterExpression()
{
    QString filter_expr;

    if (statsTreeWidget()->selectedItems().count() > 0) {
        QTreeWidgetItem *ti = statsTreeWidget()->selectedItems()[0];

        if (ti->type() == mac_whole_ue_row_type_) {
            MacUETreeWidgetItem *mac_ue_ti = static_cast<MacUETreeWidgetItem*>(ti);
            filter_expr = mac_ue_ti->filterExpression(showSRFilterCheckBox_->checkState() > Qt::Unchecked,
                                                      showRACHFilterCheckBox_->checkState() > Qt::Unchecked);
        } else {
            MacULDLTreeWidgetItem *mac_channels_ti = static_cast<MacULDLTreeWidgetItem*>(ti);
            filter_expr = mac_channels_ti->filterExpression(showSRFilterCheckBox_->checkState() > Qt::Unchecked,
                                                            showRACHFilterCheckBox_->checkState() > Qt::Unchecked);
        }
    }
    return filter_expr;
}

void LteMacStatisticsDialog::fillTree()
{
    if (!registerTapListener("mac-lte",
                             this,
                             displayFilter_.toLatin1().data(),
                             TL_REQUIRES_NOTHING,
                             tapReset,
                             tapPacket,
                             tapDraw)) {
        reject();
        return;
    }

    cap_file_.retapPackets();
    tapDraw(this);
    removeTapListeners();
}

void LteMacStatisticsDialog::updateHeaderLabels()
{
    if (statsTreeWidget()->selectedItems().count() > 0 && statsTreeWidget()->selectedItems()[0]->type() == mac_whole_ue_row_type_) {
        // Whole-UE labels
        statsTreeWidget()->setHeaderLabels(mac_whole_ue_row_labels);
    } else if (statsTreeWidget()->selectedItems().count() > 0) {
        // ULDL labels
        switch (statsTreeWidget()->selectedItems()[0]->type()) {
            case mac_ulsch_packet_count_row_type:
            case mac_ulsch_byte_count_row_type:
            case mac_dlsch_packet_count_row_type:
            case mac_dlsch_byte_count_row_type:
                statsTreeWidget()->setHeaderLabels(mac_channel_counts_labels);
                break;

            default:
                break;
        }
    }
    else {
        // Nothing selected yet, but set whole-UE labels.
        statsTreeWidget()->setHeaderLabels(mac_whole_ue_row_labels);
    }
}

void LteMacStatisticsDialog::captureFileClosing()
{
    remove_tap_listener(this);

    WiresharkDialog::captureFileClosing();
}

// Store filter from signal.
void LteMacStatisticsDialog::filterUpdated(QString filter)
{
    displayFilter_ = filter;
}

// Get the item for the row, depending upon the type of tree item.
QList<QVariant> LteMacStatisticsDialog::treeItemData(QTreeWidgetItem *item) const
{
    // Cast up to our type.
    MacULDLTreeWidgetItem *channel_item = dynamic_cast<MacULDLTreeWidgetItem*>(item);
    if (channel_item) {
        return channel_item->rowData();
    }
    MacUETreeWidgetItem *ue_item = dynamic_cast<MacUETreeWidgetItem*>(item);
    if (ue_item) {
        return ue_item->rowData();
    }

    // Need to return something..
    return QList<QVariant>();
}


// Stat command + args

static void
lte_mac_statistics_init(const char *args, void*) {
    QStringList args_l = QString(args).split(',');
    QByteArray filter;
    if (args_l.length() > 2) {
        filter = QStringList(args_l.mid(2)).join(",").toUtf8();
    }
    mainApp->emitStatCommandSignal("LteMacStatistics", filter.constData(), NULL);
}

static stat_tap_ui lte_mac_statistics_ui = {
    REGISTER_STAT_GROUP_TELEPHONY_LTE,
    QT_TRANSLATE_NOOP("LteMacStatisticsDialog", "MAC Statistics"),
    "mac-lte,stat",
    lte_mac_statistics_init,
    0,
    NULL
};

extern "C" {

void register_tap_listener_qt_lte_mac_statistics(void);

void
register_tap_listener_qt_lte_mac_statistics(void)
{
    register_stat_tap_ui(&lte_mac_statistics_ui, NULL);
}

}