color_filters.c

   1 /* color_filters.c
   2  * Routines for color filters
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24 /*
  25  * Updated 1 Dec 10 jjm
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <glib.h>
  33
  34 #include <stdio.h>
  35 #include <ctype.h>
  36 #include <string.h>
  37
  38 #include <epan/filesystem.h>
  39 #include <wsutil/file_util.h>
  40
  41 #include <epan/packet.h>
  42 #include "color.h"
  43 #include "color_filters.h"
  44 #include "file.h"
  45 #include <epan/dfilter/dfilter.h>
  46 #include "simple_dialog.h"
  47 #include "ui_util.h"
  48 #include <epan/prefs.h>
  49
  50 #define RED_COMPONENT(x)   (guint16) (((((x) >> 16) & 0xff) * 65535 / 255))
  51 #define GREEN_COMPONENT(x) (guint16) (((((x) >>  8) & 0xff) * 65535 / 255))
  52 #define BLUE_COMPONENT(x)  (guint16) ( (((x)        & 0xff) * 65535 / 255))
  53
  54 static gboolean read_users_filters(GSList **cfl);
  55
  56 /* the currently active filters */
  57 static GSList *color_filter_list = NULL;
  58
  59 /* keep "old" deleted filters in this list until
  60  * the dissection no longer needs them (e.g. file is closed) */
  61 static GSList *color_filter_deleted_list = NULL;
  62 static GSList *color_filter_valid_list = NULL;
  63
  64 /* Color Filters can en-/disabled. */
  65 static gboolean filters_enabled = TRUE;
  66
  67 /* Remember if there are temporary coloring filters set to
  68  * add sensitivity to the "Reset Coloring 1-10" menu item
  69  */
  70 static gboolean tmp_colors_set = FALSE;
  71
  72 /* Create a new filter */
  73 color_filter_t *
  74 color_filter_new(const gchar *name,    /* The name of the filter to create */
  75                  const gchar *filter_string, /* The string representing the filter */
  76                  color_t *bg_color,    /* The background color */
  77                  color_t *fg_color,    /* The foreground color */
  78                  gboolean disabled)     /* Is the filter disabled? */
  79 {
  80         color_filter_t *colorf;
  81
  82         colorf = (color_filter_t *)g_malloc(sizeof (color_filter_t));
  83         colorf->filter_name = g_strdup(name);
  84         colorf->filter_text = g_strdup(filter_string);
  85         colorf->bg_color = *bg_color;
  86         colorf->fg_color = *fg_color;
  87         colorf->disabled = disabled;
  88         colorf->c_colorfilter = NULL;
  89         colorf->edit_dialog = NULL;
  90         colorf->selected = FALSE;
  91         return colorf;
  92 }
  93
  94 /* Add ten empty (temporary) colorfilters for easy coloring */
  95 static void
  96 color_filters_add_tmp(GSList **cfl)
  97 {
  98         gchar  *name = NULL;
  99         guint32 i;
 100         gchar** bg_colors;
 101         gchar** fg_colors;
 102         unsigned long int cval;
 103         color_t bg_color, fg_color;
 104         color_filter_t *colorf;
 105
 106         g_assert(strlen(prefs.gui_colorized_fg)==69);
 107         g_assert(strlen(prefs.gui_colorized_bg)==69);
 108         fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
 109         bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);
 110
 111         for ( i=1 ; i<=10 ; i++ ) {
 112                 name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);
 113
 114                 /* retrieve background and foreground colors */
 115                 cval = strtoul(fg_colors[i-1], NULL, 16);
 116                 initialize_color(&fg_color, RED_COMPONENT(cval),
 117                                             GREEN_COMPONENT(cval),
 118                                             BLUE_COMPONENT(cval) );
 119                 cval = strtoul(bg_colors[i-1], NULL, 16);
 120                 initialize_color(&bg_color, RED_COMPONENT(cval),
 121                                             GREEN_COMPONENT(cval),
 122                                             BLUE_COMPONENT(cval) );
 123                 colorf = color_filter_new(name, NULL, &bg_color, &fg_color, TRUE);
 124                 colorf->filter_text = g_strdup("frame");
 125                 colorf->c_colorfilter = NULL;
 126                 *cfl = g_slist_append(*cfl, colorf);
 127
 128                 g_free(name);
 129         }
 130
 131         g_strfreev(fg_colors);
 132         g_strfreev(bg_colors);
 133
 134         return;
 135 }
 136
 137 static gint
 138 color_filters_find_by_name_cb(gconstpointer arg1, gconstpointer arg2)
 139 {
 140         const color_filter_t *colorf = (const color_filter_t *)arg1;
 141         const gchar          *name   = (const gchar *)arg2;
 142
 143         return (strstr(colorf->filter_name, name)==NULL) ? -1 : 0 ;
 144 }
 145
 146
 147 /* Set the filter off a temporary colorfilters and enable it */
 148 void
 149 color_filters_set_tmp(guint8 filt_nr, gchar *filter, gboolean disabled)
 150 {
 151         gchar          *name = NULL;
 152         const gchar    *tmpfilter = NULL;
 153         GSList         *cfl;
 154         color_filter_t *colorf;
 155         dfilter_t      *compiled_filter;
 156         guint8         i;
 157
 158         /* Go through the tomporary filters and look for the same filter string.
 159          * If found, clear it so that a filter can be "moved" up and down the list
 160          */
 161         for ( i=1 ; i<=10 ; i++ ) {
 162                 /* If we need to reset the temporary filter (filter==NULL), don't look
 163                  * for other rules with the same filter string
 164                  */
 165                 if( i!=filt_nr && filter==NULL )
 166                         continue;
 167
 168                 name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);
 169                 cfl = g_slist_find_custom(color_filter_list, (gpointer *) name, color_filters_find_by_name_cb);
 170                 colorf = (color_filter_t *)cfl->data;
 171
 172                 /* Only change the filter rule if this is the rule to change or if
 173                  * a matching filter string has been found
 174                  */
 175                 if(colorf && ( (i==filt_nr) || (strstr(filter,colorf->filter_text)!=NULL) ) ) {
 176                         /* set filter string to "frame" if we are resetting the rules
 177                          * or if we found a matching filter string which need to be cleared
 178                          */
 179                         tmpfilter = ( (filter==NULL) || (i!=filt_nr) ) ? "frame" : filter;
 180                         if (!dfilter_compile(tmpfilter, &compiled_filter)) {
 181                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 182                                     "Could not compile color filter name: \"%s\""
 183                                     " text: \"%s\".\n%s", name, filter, dfilter_error_msg);
 184                         } else {
 185                                 if (colorf->filter_text != NULL)
 186                                         g_free(colorf->filter_text);
 187                                 if (colorf->c_colorfilter != NULL)
 188                                         dfilter_free(colorf->c_colorfilter);
 189                                 colorf->filter_text = g_strdup(tmpfilter);
 190                                 colorf->c_colorfilter = compiled_filter;
 191                                 colorf->disabled = ((i!=filt_nr) ? TRUE : disabled);
 192                                 /* Remember that there are now temporary coloring filters set */
 193                                 if( filter )
 194                                         tmp_colors_set = TRUE;
 195                         }
 196                 }
 197                 g_free(name);
 198         }
 199         return;
 200 }
 201
 202 /* Reset the temporary colorfilters */
 203 void
 204 color_filters_reset_tmp()
 205 {
 206         guint8 i;
 207
 208         for ( i=1 ; i<=10 ; i++ ) {
 209             color_filters_set_tmp(i, NULL, TRUE);
 210         }
 211         /* Remember that there are now *no* temporary coloring filters set */
 212         tmp_colors_set = FALSE;
 213         return;
 214 }
 215
 216 /* delete the specified filter */
 217 void
 218 color_filter_delete(color_filter_t *colorf)
 219 {
 220         if (colorf->filter_name != NULL)
 221                 g_free(colorf->filter_name);
 222         if (colorf->filter_text != NULL)
 223                 g_free(colorf->filter_text);
 224         if (colorf->c_colorfilter != NULL)
 225                 dfilter_free(colorf->c_colorfilter);
 226         g_free(colorf);
 227 }
 228
 229 /* delete the specified filter (called from g_slist_foreach) */
 230 static void
 231 color_filter_delete_cb(gpointer filter_arg, gpointer unused _U_)
 232 {
 233         color_filter_t *colorf = (color_filter_t *)filter_arg;
 234
 235         color_filter_delete(colorf);
 236 }
 237
 238 /* delete the specified list */
 239 void
 240 color_filter_list_delete(GSList **cfl)
 241 {
 242         g_slist_foreach(*cfl, color_filter_delete_cb, NULL);
 243         g_slist_free(*cfl);
 244         *cfl = NULL;
 245 }
 246
 247 /* clone a single list entries from normal to edit list */
 248 static color_filter_t *
 249 color_filter_clone(color_filter_t *colorf)
 250 {
 251         color_filter_t *new_colorf;
 252
 253         new_colorf = (color_filter_t *)g_malloc(sizeof (color_filter_t));
 254         new_colorf->filter_name = g_strdup(colorf->filter_name);
 255         new_colorf->filter_text = g_strdup(colorf->filter_text);
 256         new_colorf->bg_color = colorf->bg_color;
 257         new_colorf->fg_color = colorf->fg_color;
 258         new_colorf->disabled = colorf->disabled;
 259         new_colorf->c_colorfilter = NULL;
 260         new_colorf->edit_dialog = NULL;
 261         new_colorf->selected = FALSE;
 262
 263         return new_colorf;
 264 }
 265
 266 static void
 267 color_filter_list_clone_cb(gpointer filter_arg, gpointer cfl_arg)
 268 {
 269         GSList **cfl = (GSList **)cfl_arg;
 270         color_filter_t *new_colorf;
 271
 272         new_colorf = color_filter_clone((color_filter_t *)filter_arg);
 273         *cfl = g_slist_append(*cfl, new_colorf);
 274 }
 275
 276 /* clone the specified list */
 277 static GSList *
 278 color_filter_list_clone(GSList *cfl)
 279 {
 280         GSList *new_list = NULL;
 281
 282         g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);
 283
 284         return new_list;
 285 }
 286
 287 /* Initialize the filter structures (reading from file) for general running, including app startup */
 288 void
 289 color_filters_init(void)
 290 {
 291         /* delete all currently existing filters */
 292         color_filter_list_delete(&color_filter_list);
 293
 294         /* start the list with the temporary colorizing rules */
 295         color_filters_add_tmp(&color_filter_list);
 296
 297         /* try to read the users filters */
 298         if (!read_users_filters(&color_filter_list))
 299                 /* if that failed, try to read the global filters */
 300                 color_filters_read_globals(&color_filter_list);
 301 }
 302
 303 void
 304 color_filters_reload(void)
 305 {
 306         /* "move" old entries to the deleted list
 307          * we must keep them until the dissection no longer needs them */
 308         color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
 309         color_filter_list = NULL;
 310
 311         /* start the list with the temporary colorizing rules */
 312         color_filters_add_tmp(&color_filter_list);
 313
 314         /* try to read the users filters */
 315         if (!read_users_filters(&color_filter_list))
 316                 /* if that failed, try to read the global filters */
 317                 color_filters_read_globals(&color_filter_list);
 318 }
 319
 320 void
 321 color_filters_cleanup(void)
 322 {
 323         /* delete the previously deleted filters */
 324         color_filter_list_delete(&color_filter_deleted_list);
 325 }
 326
 327 static void
 328 color_filters_clone_cb(gpointer filter_arg, gpointer user_data)
 329 {
 330         color_filter_t * new_colorf = color_filter_clone((color_filter_t *)filter_arg);
 331         color_filter_add_cb (new_colorf, user_data);
 332 }
 333
 334 void
 335 color_filters_clone(gpointer user_data)
 336 {
 337         g_slist_foreach(color_filter_list, color_filters_clone_cb, user_data);
 338 }
 339
 340
 341 static void
 342 color_filter_compile_cb(gpointer filter_arg, gpointer unused _U_)
 343 {
 344         color_filter_t *colorf = (color_filter_t *)filter_arg;
 345
 346         g_assert(colorf->c_colorfilter == NULL);
 347         if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
 348                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 349                 "Could not compile color filter name: \"%s\" text: \"%s\".\n%s",
 350                               colorf->filter_name, colorf->filter_text, dfilter_error_msg);
 351                 /* this filter was compilable before, so this should never happen */
 352                 /* except if the OK button of the parent window has been clicked */
 353                 /* so don't use g_assert_not_reached() but check the filters again */
 354         }
 355 }
 356
 357 static void
 358 color_filter_validate_cb(gpointer filter_arg, gpointer unused _U_)
 359 {
 360         color_filter_t *colorf = (color_filter_t *)filter_arg;
 361
 362         g_assert(colorf->c_colorfilter == NULL);
 363         if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
 364                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 365                 "Removing color filter name: \"%s\" text: \"%s\".\n%s",
 366                               colorf->filter_name, colorf->filter_text, dfilter_error_msg);
 367                 /* Delete the color filter from the list of color filters. */
 368                 color_filter_valid_list = g_slist_remove(color_filter_valid_list, colorf);
 369                 color_filter_delete(colorf);
 370         }
 371 }
 372
 373 /* apply changes from the edit list */
 374 void
 375 color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl)
 376 {
 377         /* "move" old entries to the deleted list
 378          * we must keep them until the dissection no longer needs them */
 379         color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
 380         color_filter_list = NULL;
 381
 382         /* clone all list entries from tmp/edit to normal list */
 383         color_filter_valid_list = NULL;
 384         color_filter_valid_list = color_filter_list_clone(tmp_cfl);
 385         color_filter_valid_list = g_slist_concat(color_filter_valid_list,
 386                                                  color_filter_list_clone(edit_cfl) );
 387
 388         /* compile all filter */
 389         g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, NULL);
 390
 391         /* clone all list entries from tmp/edit to normal list */
 392         color_filter_list = color_filter_list_clone(color_filter_valid_list);
 393
 394         /* compile all filter */
 395         g_slist_foreach(color_filter_list, color_filter_compile_cb, NULL);
 396 }
 397
 398 gboolean
 399 color_filters_used(void)
 400 {
 401         return color_filter_list != NULL && filters_enabled;
 402 }
 403
 404 gboolean
 405 tmp_color_filters_used(void)
 406 {
 407         return tmp_colors_set;
 408 }
 409
 410 void
 411 color_filters_enable(gboolean enable)
 412 {
 413         new_packet_list_enable_color(enable);
 414 }
 415
 416
 417 /* prepare the epan_dissect_t for the filter */
 418 static void
 419 prime_edt(gpointer data, gpointer user_data)
 420 {
 421         color_filter_t  *colorf = (color_filter_t *)data;
 422         epan_dissect_t   *edt = (epan_dissect_t *)user_data;
 423
 424         if (colorf->c_colorfilter != NULL)
 425                 epan_dissect_prime_dfilter(edt, colorf->c_colorfilter);
 426 }
 427
 428 /* Prime the epan_dissect_t with all the compiler
 429  * color filters in 'color_filter_list'. */
 430 void
 431 color_filters_prime_edt(epan_dissect_t *edt)
 432 {
 433         if (color_filters_used())
 434                 g_slist_foreach(color_filter_list, prime_edt, edt);
 435 }
 436
 437 /* * Return the color_t for later use */
 438 const color_filter_t *
 439 color_filters_colorize_packet(epan_dissect_t *edt)
 440 {
 441         GSList *curr;
 442         color_filter_t *colorf;
 443
 444         /* If we have color filters, "search" for the matching one. */
 445         if (color_filters_used()) {
 446                 curr = color_filter_list;
 447
 448                 while(curr != NULL) {
 449                         colorf = (color_filter_t *)curr->data;
 450                         if ( (!colorf->disabled) &&
 451                              (colorf->c_colorfilter != NULL) &&
 452                              dfilter_apply_edt(colorf->c_colorfilter, edt)) {
 453                                 return colorf;
 454                         }
 455                         curr = g_slist_next(curr);
 456                 }
 457         }
 458
 459         return NULL;
 460 }
 461
 462 /* read filters from the given file */
 463 /* XXX - Would it make more sense to use GStrings here instead of reallocing
 464    our buffers? */
 465 static gboolean
 466 read_filters_file(FILE *f, gpointer user_data)
 467 {
 468 #define INIT_BUF_SIZE 128
 469         gchar  *name = NULL;
 470         gchar  *filter_exp = NULL;
 471         guint32 name_len = INIT_BUF_SIZE;
 472         guint32 filter_exp_len = INIT_BUF_SIZE;
 473         guint32 i = 0;
 474         gint32  c;
 475         guint16 fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
 476         gboolean disabled = FALSE;
 477         gboolean skip_end_of_line = FALSE;
 478
 479         name = (gchar *)g_malloc(name_len + 1);
 480         filter_exp = (gchar *)g_malloc(filter_exp_len + 1);
 481
 482         while (1) {
 483
 484                 if (skip_end_of_line) {
 485                         do {
 486                                 c = getc(f);
 487                         } while (c != EOF && c != '\n');
 488                         if (c == EOF)
 489                                 break;
 490                         disabled = FALSE;
 491                         skip_end_of_line = FALSE;
 492                 }
 493
 494                 while ((c = getc(f)) != EOF && isspace(c)) {
 495                         if (c == '\n') {
 496                                 continue;
 497                         }
 498                 }
 499
 500                 if (c == EOF)
 501                         break;
 502
 503                 if (c == '!') {
 504                         disabled = TRUE;
 505                         continue;
 506                 }
 507
 508                 /* skip # comments and invalid lines */
 509                 if (c != '@') {
 510                         skip_end_of_line = TRUE;
 511                         continue;
 512                 }
 513
 514                 /* we get the @ delimiter.
 515                  * Format is:
 516                  * @name@filter expression@[background r,g,b][foreground r,g,b]
 517                  */
 518
 519                 /* retrieve name */
 520                 i = 0;
 521                 while (1) {
 522                         c = getc(f);
 523                         if (c == EOF || c == '@')
 524                                 break;
 525                         if (i >= name_len) {
 526                                 /* buffer isn't long enough; double its length.*/
 527                                 name_len *= 2;
 528                                 name = (gchar *)g_realloc(name, name_len + 1);
 529                         }
 530                         name[i++] = c;
 531                 }
 532                 name[i] = '\0';
 533
 534                 if (c == EOF) {
 535                         break;
 536                 } else if (i == 0) {
 537                         skip_end_of_line = TRUE;
 538                         continue;
 539                 }
 540
 541                 /* retrieve filter expression */
 542                 i = 0;
 543                 while (1) {
 544                         c = getc(f);
 545                         if (c == EOF || c == '@')
 546                                 break;
 547                         if (i >= filter_exp_len) {
 548                                 /* buffer isn't long enough; double its length.*/
 549                                 filter_exp_len *= 2;
 550                                 filter_exp = (gchar *)g_realloc(filter_exp, filter_exp_len + 1);
 551                         }
 552                         filter_exp[i++] = c;
 553                 }
 554                 filter_exp[i] = '\0';
 555
 556                 if (c == EOF) {
 557                         break;
 558                 } else if (i == 0) {
 559                         skip_end_of_line = TRUE;
 560                         continue;
 561                 }
 562
 563                 /* retrieve background and foreground colors */
 564                 if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
 565                         &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
 566
 567                         /* we got a complete color filter */
 568
 569                         color_t bg_color, fg_color;
 570                         color_filter_t *colorf;
 571                         dfilter_t *temp_dfilter;
 572
 573                         if (!dfilter_compile(filter_exp, &temp_dfilter)) {
 574                                 g_warning("Could not compile color filter \"%s\" from saved filters: %s",
 575                                         name, dfilter_error_msg);
 576                                 skip_end_of_line = TRUE;
 577                                 continue;
 578                         }
 579
 580                         if (!initialize_color(&fg_color, fg_r, fg_g, fg_b)) {
 581                                 /* oops */
 582                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 583                                     "Could not allocate foreground color "
 584                                     "specified in input file for %s.", name);
 585                                 dfilter_free(temp_dfilter);
 586                                 skip_end_of_line = TRUE;
 587                                 continue;
 588                         }
 589                         if (!initialize_color(&bg_color, bg_r, bg_g, bg_b)) {
 590                                 /* oops */
 591                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 592                                     "Could not allocate background color "
 593                                     "specified in input file for %s.", name);
 594                                 dfilter_free(temp_dfilter);
 595                                 skip_end_of_line = TRUE;
 596                                 continue;
 597                         }
 598
 599                         colorf = color_filter_new(name, filter_exp, &bg_color,
 600                             &fg_color, disabled);
 601                         if(user_data == &color_filter_list) {
 602                                 GSList **cfl = (GSList **)user_data;
 603
 604                                 /* internal call */
 605                                 colorf->c_colorfilter = temp_dfilter;
 606                                 *cfl = g_slist_append(*cfl, colorf);
 607                         } else {
 608                                 /* external call */
 609                                 /* just editing, don't need the compiled filter */
 610                                 dfilter_free(temp_dfilter);
 611                                 color_filter_add_cb (colorf, user_data);
 612                         }
 613                 }    /* if sscanf */
 614
 615                 skip_end_of_line = TRUE;
 616         }
 617
 618         g_free(name);
 619         g_free(filter_exp);
 620         return TRUE;
 621 }
 622
 623 /* read filters from the user's filter file */
 624 static gboolean
 625 read_users_filters(GSList **cfl)
 626 {
 627         gchar *path;
 628         FILE *f;
 629         gboolean ret;
 630
 631         /* decide what file to open (from dfilter code) */
 632         path = get_persconffile_path("colorfilters", TRUE, FALSE);
 633         if ((f = ws_fopen(path, "r")) == NULL) {
 634                 if (errno != ENOENT) {
 635                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 636                             "Could not open filter file\n\"%s\": %s.", path,
 637                             strerror(errno));
 638                 }
 639                 g_free(path);
 640                 return FALSE;
 641         }
 642         g_free(path);
 643         path = NULL;
 644
 645         ret = read_filters_file(f, cfl);
 646         fclose(f);
 647         return ret;
 648 }
 649
 650 /* read filters from the filter file */
 651 gboolean
 652 color_filters_read_globals(gpointer user_data)
 653 {
 654         gchar *path;
 655         FILE *f;
 656         gboolean ret;
 657
 658         /* decide what file to open (from dfilter code) */
 659         path = get_datafile_path("colorfilters");
 660         if ((f = ws_fopen(path, "r")) == NULL) {
 661                 if (errno != ENOENT) {
 662                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 663                             "Could not open global filter file\n\"%s\": %s.", path,
 664                             strerror(errno));
 665                 }
 666                 g_free(path);
 667                 return FALSE;
 668         }
 669         g_free(path);
 670         path = NULL;
 671
 672         ret = read_filters_file(f, user_data);
 673         fclose(f);
 674         return ret;
 675 }
 676
 677 /* read filters from some other filter file (import) */
 678 gboolean
 679 color_filters_import(gchar *path, gpointer user_data)
 680 {
 681         FILE *f;
 682         gboolean ret;
 683
 684         if ((f = ws_fopen(path, "r")) == NULL) {
 685                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 686                     "Could not open\n%s\nfor reading: %s.",
 687                     path, strerror(errno));
 688                 return FALSE;
 689         }
 690
 691         ret = read_filters_file(f, user_data);
 692         fclose(f);
 693         return ret;
 694 }
 695
 696 struct write_filter_data
 697 {
 698         FILE * f;
 699         gboolean only_selected;
 700 };
 701
 702 /* save a single filter */
 703 static void
 704 write_filter(gpointer filter_arg, gpointer data_arg)
 705 {
 706         struct write_filter_data *data = (struct write_filter_data *)data_arg;
 707         color_filter_t *colorf = (color_filter_t *)filter_arg;
 708         FILE *f = data->f;
 709
 710         if ( (colorf->selected || !data->only_selected) &&
 711              (strstr(colorf->filter_name,TEMP_COLOR_PREFIX)==NULL) ) {
 712                 fprintf(f,"%s@%s@%s@[%d,%d,%d][%d,%d,%d]\n",
 713                     colorf->disabled ? "!" : "",
 714                     colorf->filter_name,
 715                     colorf->filter_text,
 716                     colorf->bg_color.red,
 717                     colorf->bg_color.green,
 718                     colorf->bg_color.blue,
 719                     colorf->fg_color.red,
 720                     colorf->fg_color.green,
 721                     colorf->fg_color.blue);
 722         }
 723 }
 724
 725 /* save filters in a filter file */
 726 static gboolean
 727 write_filters_file(GSList *cfl, FILE *f, gboolean only_selected)
 728 {
 729         struct write_filter_data data;
 730
 731         data.f = f;
 732         data.only_selected = only_selected;
 733
 734         fprintf(f,"# DO NOT EDIT THIS FILE!  It was created by Wireshark\n");
 735         g_slist_foreach(cfl, write_filter, &data);
 736         return TRUE;
 737 }
 738
 739 /* save filters in users filter file */
 740 gboolean
 741 color_filters_write(GSList *cfl)
 742 {
 743         gchar *pf_dir_path;
 744         gchar *path;
 745         FILE *f;
 746
 747         /* Create the directory that holds personal configuration files,
 748            if necessary.  */
 749         if (create_persconffile_dir(&pf_dir_path) == -1) {
 750                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 751                     "Can't create directory\n\"%s\"\nfor color files: %s.",
 752                     pf_dir_path, strerror(errno));
 753                 g_free(pf_dir_path);
 754                 return FALSE;
 755         }
 756
 757         path = get_persconffile_path("colorfilters", TRUE, TRUE);
 758         if ((f = ws_fopen(path, "w+")) == NULL) {
 759                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 760                     "Could not open\n%s\nfor writing: %s.",
 761                     path, strerror(errno));
 762                 g_free(path);
 763                 return FALSE;
 764         }
 765         g_free(path);
 766         write_filters_file(cfl, f, FALSE);
 767         fclose(f);
 768         return TRUE;
 769 }
 770
 771 /* save filters in some other filter file (export) */
 772 gboolean
 773 color_filters_export(gchar *path, GSList *cfl, gboolean only_marked)
 774 {
 775         FILE *f;
 776
 777         if ((f = ws_fopen(path, "w+")) == NULL) {
 778                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 779                     "Could not open\n%s\nfor writing: %s.",
 780                     path, strerror(errno));
 781                 return FALSE;
 782         }
 783         write_filters_file(cfl, f, only_marked);
 784         fclose(f);
 785         return TRUE;
 786 }
 787