epan/packet-range.c

   1 /* packet-range.c
   2  * Packet range routines (save, print, ...)
   3  *
   4  * $Id$
   5  *
   6  * Dick Gooris <gooris@lucent.com>
   7  * Ulf Lamping <ulf.lamping@web.de>
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <ctype.h>
  33
  34 #include <glib.h>
  35
  36 #include <epan/frame_data.h>
  37
  38 #include "packet-range.h"
  39
  40 /* (re-)calculate the packet counts (except the user specified range) */
  41 static void packet_range_calc(packet_range_t *range) {
  42     guint32       framenum;
  43     guint32       mark_low;
  44     guint32       mark_high;
  45     guint32       displayed_mark_low;
  46     guint32       displayed_mark_high;
  47     frame_data    *packet;
  48
  49
  50     range->selected_packet        = 0L;
  51
  52     mark_low                      = 0L;
  53     mark_high                     = 0L;
  54     range->mark_range_cnt         = 0L;
  55     range->ignored_cnt            = 0L;
  56     range->ignored_marked_cnt     = 0L;
  57     range->ignored_mark_range_cnt = 0L;
  58     range->ignored_user_range_cnt = 0L;
  59
  60     displayed_mark_low            = 0L;
  61     displayed_mark_high           = 0L;
  62     range->displayed_cnt          = 0L;
  63     range->displayed_marked_cnt   = 0L;
  64     range->displayed_mark_range_cnt=0L;
  65     range->displayed_plus_dependents_cnt    = 0L;
  66     range->displayed_ignored_cnt            = 0L;
  67     range->displayed_ignored_marked_cnt     = 0L;
  68     range->displayed_ignored_mark_range_cnt = 0L;
  69     range->displayed_ignored_user_range_cnt = 0L;
  70
  71     g_assert(range->cf != NULL);
  72
  73     /* XXX - this doesn't work unless you have a full set of frame_data
  74      * structures for all packets in the capture, which is not,
  75      * for example, the case when TShark is doing a one-pass
  76      * read of a file or a live capture.
  77      *
  78      * It's also horribly slow on large captures, causing it to
  79      * take a long time for the Save As dialog to pop up, for
  80      * example.  We should really keep these statistics in
  81      * the capture_file structure, updating them whenever we
  82      * filter the display, etc..
  83      */
  84     if (range->cf->frames != NULL) {
  85         /* The next for-loop is used to obtain the amount of packets
  86          * to be processed and is used to present the information in
  87          * the Save/Print As widget.
  88          * We have different types of ranges: All the packets, the number
  89          * of packets of a marked range, a single packet, and a user specified
  90          * packet range. The last one is not calculated here since this
  91          * data must be entered in the widget by the user.
  92          */
  93
  94         for(framenum = 1; framenum <= range->cf->count; framenum++) {
  95             packet = frame_data_sequence_find(range->cf->frames, framenum);
  96
  97             if (range->cf->current_frame == packet) {
  98                 range->selected_packet = framenum;
  99             }
 100             if (packet->flags.passed_dfilter) {
 101                 range->displayed_cnt++;
 102             }
 103             if (packet->flags.passed_dfilter ||
 104                 packet->flags.dependent_of_displayed) {
 105                 range->displayed_plus_dependents_cnt++;
 106             }
 107             if (packet->flags.marked) {
 108                 if (packet->flags.ignored) {
 109                     range->ignored_marked_cnt++;
 110                 }
 111                 if (packet->flags.passed_dfilter) {
 112                     range->displayed_marked_cnt++;
 113                     if (packet->flags.ignored) {
 114                         range->displayed_ignored_marked_cnt++;
 115                     }
 116                     if (displayed_mark_low == 0) {
 117                        displayed_mark_low = framenum;
 118                     }
 119                     if (framenum > displayed_mark_high) {
 120                        displayed_mark_high = framenum;
 121                     }
 122                 }
 123
 124                 if (mark_low == 0) {
 125                    mark_low = framenum;
 126                 }
 127                 if (framenum > mark_high) {
 128                    mark_high = framenum;
 129                 }
 130             }
 131             if (packet->flags.ignored) {
 132                 range->ignored_cnt++;
 133                 if (packet->flags.passed_dfilter) {
 134                     range->displayed_ignored_cnt++;
 135                 }
 136             }
 137         }
 138
 139         for(framenum = 1; framenum <= range->cf->count; framenum++) {
 140             packet = frame_data_sequence_find(range->cf->frames, framenum);
 141
 142             if (framenum >= mark_low &&
 143                 framenum <= mark_high)
 144             {
 145                 range->mark_range_cnt++;
 146                 if (packet->flags.ignored) {
 147                     range->ignored_mark_range_cnt++;
 148                 }
 149             }
 150
 151             if (framenum >= displayed_mark_low &&
 152                 framenum <= displayed_mark_high)
 153             {
 154                 if (packet->flags.passed_dfilter) {
 155                     range->displayed_mark_range_cnt++;
 156                     if (packet->flags.ignored) {
 157                         range->displayed_ignored_mark_range_cnt++;
 158                     }
 159                 }
 160             }
 161         }
 162
 163 #if 0
 164         /* in case we marked just one packet, we add 1. */
 165         if (range->cf->marked_count != 0) {
 166             range->mark_range = mark_high - mark_low + 1;
 167         }
 168
 169         /* in case we marked just one packet, we add 1. */
 170         if (range->displayed_marked_cnt != 0) {
 171             range->displayed_mark_range = displayed_mark_high - displayed_mark_low + 1;
 172         }
 173 #endif
 174     }
 175 }
 176
 177
 178 /* (re-)calculate the user specified packet range counts */
 179 static void packet_range_calc_user(packet_range_t *range) {
 180     guint32       framenum;
 181     frame_data    *packet;
 182
 183     range->user_range_cnt             = 0L;
 184     range->ignored_user_range_cnt     = 0L;
 185     range->displayed_user_range_cnt   = 0L;
 186     range->displayed_ignored_user_range_cnt = 0L;
 187
 188     g_assert(range->cf != NULL);
 189
 190     /* XXX - this doesn't work unless you have a full set of frame_data
 191      * structures for all packets in the capture, which is not,
 192      * for example, the case when TShark is doing a one-pass
 193      * read of a file or a live capture.
 194      *
 195      * It's also horribly slow on large captures, causing it to
 196      * take a long time for the Save As dialog to pop up, for
 197      * example.  This obviously can't be kept in the capture_file
 198      * structure and recalculated whenever we filter the display
 199      * or mark frames as ignored, as the results of this depend
 200      * on what the user specifies.  In some cases, limiting the
 201      * frame_data structures at which we look to the ones specified
 202      * by the user might help, but if most of the frames are in
 203      * the range, that won't help.  In that case, if we could
 204      * examine the *complement* of the range, and *subtract* them
 205      * from the statistics for the capture as a whole, that might
 206      * help, but if the user specified about *half* the packets in
 207      * the range, that won't help, either.
 208      */
 209     if (range->cf->frames != NULL) {
 210         for(framenum = 1; framenum <= range->cf->count; framenum++) {
 211             packet = frame_data_sequence_find(range->cf->frames, framenum);
 212
 213             if (value_is_in_range(range->user_range, framenum)) {
 214                 range->user_range_cnt++;
 215                 if (packet->flags.ignored) {
 216                     range->ignored_user_range_cnt++;
 217                 }
 218                 if (packet->flags.passed_dfilter) {
 219                     range->displayed_user_range_cnt++;
 220                     if (packet->flags.ignored) {
 221                         range->displayed_ignored_user_range_cnt++;
 222                     }
 223                 }
 224             }
 225         }
 226     }
 227 }
 228
 229
 230 /* init the range struct */
 231 void packet_range_init(packet_range_t *range, capture_file *cf) {
 232
 233     memset(range, 0, sizeof(packet_range_t));
 234     range->process    = range_process_all;
 235     range->user_range = range_empty();
 236     range->cf         = cf;
 237
 238     /* calculate all packet range counters */
 239     packet_range_calc(range);
 240     packet_range_calc_user(range);
 241 }
 242
 243 /* check whether the packet range is OK */
 244 convert_ret_t packet_range_check(packet_range_t *range) {
 245     if (range->process == range_process_user_range && range->user_range == NULL) {
 246         /* Not valid - return the error. */
 247         return range->user_range_status;
 248     }
 249     return CVT_NO_ERROR;
 250 }
 251
 252 /* init the processing run */
 253 void packet_range_process_init(packet_range_t *range) {
 254     /* Check that, if an explicit range was selected, it's valid. */
 255     /* "enumeration" values */
 256     range->marked_range_active    = FALSE;
 257     range->selected_done          = FALSE;
 258
 259     if (range->process_filtered == FALSE) {
 260         range->marked_range_left = range->mark_range_cnt;
 261     } else {
 262         range->marked_range_left = range->displayed_mark_range_cnt;
 263     }
 264 }
 265
 266 /* do we have to process all packets? */
 267 gboolean packet_range_process_all(packet_range_t *range) {
 268     return range->process == range_process_all && !range->process_filtered && !range->remove_ignored;
 269 }
 270
 271 /* do we have to process this packet? */
 272 range_process_e packet_range_process_packet(packet_range_t *range, frame_data *fdata) {
 273
 274     if (range->remove_ignored && fdata->flags.ignored) {
 275         return range_process_next;
 276     }
 277
 278     g_assert(range->cf != NULL);
 279
 280     switch(range->process) {
 281     case(range_process_all):
 282         break;
 283     case(range_process_selected):
 284         if (range->selected_done) {
 285           return range_processing_finished;
 286         }
 287         if (fdata->num != range->cf->current_frame->num) {
 288           return range_process_next;
 289         }
 290         range->selected_done = TRUE;
 291         break;
 292     case(range_process_marked):
 293         if (fdata->flags.marked == FALSE) {
 294           return range_process_next;
 295         }
 296         break;
 297     case(range_process_marked_range):
 298         if (range->marked_range_left == 0) {
 299           return range_processing_finished;
 300         }
 301         if (fdata->flags.marked == TRUE) {
 302           range->marked_range_active = TRUE;
 303         }
 304         if (range->marked_range_active == FALSE ) {
 305           return range_process_next;
 306         }
 307         if (!range->process_filtered ||
 308           (range->process_filtered && fdata->flags.passed_dfilter == TRUE))
 309         {
 310           range->marked_range_left--;
 311         }
 312         break;
 313     case(range_process_user_range):
 314         if (value_is_in_range(range->user_range, fdata->num) == FALSE) {
 315           return range_process_next;
 316         }
 317         break;
 318     default:
 319         g_assert_not_reached();
 320     }
 321
 322     /* This packet has to pass the display filter but didn't?
 323      * Try next, but only if we're not including dependent packets and this
 324      * packet happens to be a dependency on something that is displayed.
 325      */
 326     if ((range->process_filtered && fdata->flags.passed_dfilter == FALSE) &&
 327         !(range->include_dependents && fdata->flags.dependent_of_displayed)) {
 328         return range_process_next;
 329     }
 330
 331     /* We fell through the conditions above, so we accept this packet */
 332     return range_process_this;
 333 }
 334
 335
 336 /******************** Range Entry Parser *********************************/
 337
 338 /* Converts a range string to a user range.
 339  * The parameter 'es' points to the string to be converted, and is defined in
 340  * the Save/Print-As widget.
 341  */
 342
 343 void packet_range_convert_str(packet_range_t *range, const gchar *es)
 344 {
 345     range_t *new_range;
 346     convert_ret_t ret;
 347
 348     if (range->user_range != NULL)
 349         g_free(range->user_range);
 350
 351     g_assert(range->cf != NULL);
 352
 353     ret = range_convert_str(&new_range, es, range->cf->count);
 354     if (ret != CVT_NO_ERROR) {
 355         /* range isn't valid */
 356         range->user_range                 = NULL;
 357         range->user_range_status          = ret;
 358         range->user_range_cnt             = 0L;
 359         range->ignored_user_range_cnt     = 0L;
 360         range->displayed_user_range_cnt   = 0L;
 361         range->displayed_ignored_user_range_cnt = 0L;
 362         return;
 363     }
 364     range->user_range = new_range;
 365
 366     /* calculate new user specified packet range counts */
 367     packet_range_calc_user(range);
 368 } /* packet_range_convert_str */