ui/file_dialog.c

   1 /* file_dialog.c
   2  * Common file dialog routines
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 2006 Gerald Combs
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include "config.h"
  12
  13 #include <time.h>
  14
  15 #include <glib.h>
  16
  17 #include <wsutil/nstime.h>
  18
  19 #include <wiretap/wtap.h>
  20
  21 #include <epan/prefs.h>
  22
  23 #include "ui/file_dialog.h"
  24
  25 ws_file_preview_stats_status
  26 get_stats_for_preview(wtap *wth, ws_file_preview_stats *stats,
  27                       int *err, char **err_info)
  28 {
  29     int64_t      data_offset;
  30     wtap_rec     rec;
  31     Buffer       buf;
  32     uint32_t     records;
  33     uint32_t     data_records;
  34     double       start_time;
  35     double       stop_time;
  36     bool         have_times;
  37     bool         timed_out;
  38     time_t       time_preview, time_current;
  39     double       cur_time;
  40
  41     have_times = false;
  42     start_time = 0;
  43     stop_time = 0;
  44     records = 0;
  45     data_records = 0;
  46     timed_out = false;
  47     time(&time_preview);
  48     wtap_rec_init(&rec);
  49     ws_buffer_init(&buf, 1514);
  50     while ((wtap_read(wth, &rec, &buf, err, err_info, &data_offset))) {
  51         if (rec.presence_flags & WTAP_HAS_TS) {
  52             cur_time = nstime_to_sec(&rec.ts);
  53             if (!have_times) {
  54                 start_time = cur_time;
  55                 stop_time = cur_time;
  56                 have_times = true;
  57             }
  58             if (cur_time < start_time) {
  59                 start_time = cur_time;
  60             }
  61             if (cur_time > stop_time){
  62                 stop_time = cur_time;
  63             }
  64         }
  65
  66         switch (rec.rec_type) {
  67
  68         case REC_TYPE_PACKET:
  69         case REC_TYPE_FT_SPECIFIC_EVENT:
  70         case REC_TYPE_FT_SPECIFIC_REPORT:
  71         case REC_TYPE_SYSCALL:
  72         case REC_TYPE_SYSTEMD_JOURNAL_EXPORT:
  73             data_records++;
  74             break;
  75         }
  76
  77         records++;
  78         if ((records % 1000) == 0) {
  79             /* do we have a timeout? */
  80             time(&time_current);
  81             if (time_current-time_preview >= (time_t) prefs.gui_fileopen_preview) {
  82                 timed_out = true;
  83                 break;
  84             }
  85         }
  86         wtap_rec_reset(&rec);
  87     }
  88
  89     stats->have_times = have_times;
  90     stats->start_time = start_time;
  91     stats->stop_time = stop_time;
  92     stats->records = records;
  93     stats->data_records = data_records;
  94
  95     wtap_rec_cleanup(&rec);
  96     ws_buffer_free(&buf);
  97
  98     if (*err != 0) {
  99         /* Read error. */
 100         return PREVIEW_READ_ERROR;
 101     }
 102     return timed_out ? PREVIEW_TIMED_OUT : PREVIEW_SUCCEEDED;
 103 }