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 #include <ctype.h>
  34 #include <string.h>
  35
  36 #include <epan/filesystem.h>
  37 #include <wsutil/file_util.h>
  38
  39 #include <epan/packet.h>
  40 #include "color.h"
  41 #include "color_filters.h"
  42 #include "file.h"
  43 #include <epan/dfilter/dfilter.h>
  44 #include "simple_dialog.h"
  45 #include "ui_util.h"
  46 #include <epan/prefs.h>
  47
  48 #define RED_COMPONENT(x)   (guint16) (((((x) >> 16) & 0xff) * 65535 / 255))
  49 #define GREEN_COMPONENT(x) (guint16) (((((x) >>  8) & 0xff) * 65535 / 255))
  50 #define BLUE_COMPONENT(x)  (guint16) ( (((x)        & 0xff) * 65535 / 255))
  51
  52 static gboolean read_users_filters(GSList **cfl);
  53
  54 /* the currently active filters */
  55 static GSList *color_filter_list = NULL;
  56
  57 /* keep "old" deleted filters in this list until
  58  * the dissection no longer needs them (e.g. file is closed) */
  59 static GSList *color_filter_deleted_list = NULL;
  60 static GSList *color_filter_valid_list = NULL;
  61
  62 /* Color Filters can en-/disabled. */
  63 gboolean filters_enabled = TRUE;
  64
  65 /* Remember if there are temporary coloring filters set to
  66  * add sensitivity to the "Reset Coloring 1-10" menu item
  67  */
  68 gboolean tmp_colors_set = FALSE;
  69
  70 /* Create a new filter */
  71 color_filter_t *
  72 color_filter_new(const gchar *name,    /* The name of the filter to create */
  73                  const gchar *filter_string, /* The string representing the filter */
  74                  color_t *bg_color,    /* The background color */
  75                  color_t *fg_color,    /* The foreground color */
  76                  gboolean disabled)     /* Is the filter disabled? */
  77 {
  78         color_filter_t *colorf;
  79
  80         colorf = g_malloc(sizeof (color_filter_t));
  81         colorf->filter_name = g_strdup(name);
  82         colorf->filter_text = g_strdup(filter_string);
  83         colorf->bg_color = *bg_color;
  84         colorf->fg_color = *fg_color;
  85         colorf->disabled = disabled;
  86         colorf->c_colorfilter = NULL;
  87         colorf->edit_dialog = NULL;
  88         colorf->selected = FALSE;
  89         return colorf;
  90 }
  91
  92 /* Add ten empty (temporary) colorfilters for easy coloring */
  93 void
  94 color_filters_add_tmp(GSList **cfl)
  95 {
  96         gchar  *name = NULL;
  97         guint32 i;
  98         gchar** bg_colors;
  99         gchar** fg_colors;
 100         unsigned long int cval;
 101         color_t bg_color, fg_color;
 102         color_filter_t *colorf;
 103
 104         g_assert(strlen(prefs.gui_colorized_fg)==69);
 105         g_assert(strlen(prefs.gui_colorized_bg)==69);
 106         fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
 107         bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);
 108
 109         for ( i=1 ; i<=10 ; i++ ) {
 110                 name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);
 111
 112                 /* retrieve background and foreground colors */
 113                 cval = strtoul(fg_colors[i-1], NULL, 16);
 114                 initialize_color(&fg_color, RED_COMPONENT(cval),
 115                                             GREEN_COMPONENT(cval),
 116                                             BLUE_COMPONENT(cval) );
 117                 cval = strtoul(bg_colors[i-1], NULL, 16);
 118                 initialize_color(&bg_color, RED_COMPONENT(cval),
 119                                             GREEN_COMPONENT(cval),
 120                                             BLUE_COMPONENT(cval) );
 121                 colorf = color_filter_new(name, NULL, &bg_color, &fg_color, TRUE);
 122                 colorf->filter_text = g_strdup("frame");
 123                 colorf->c_colorfilter = NULL;
 124                 *cfl = g_slist_append(*cfl, colorf);
 125
 126                 g_free(name);
 127         }
 128
 129         g_strfreev(fg_colors);
 130         g_strfreev(bg_colors);
 131
 132         return;
 133 }
 134
 135 static gint
 136 color_filters_find_by_name_cb(gconstpointer arg1, gconstpointer arg2)
 137 {
 138         color_filter_t *colorf = (color_filter_t *)arg1;
 139         gchar          *name   = (gchar *)arg2;
 140
 141         return (strstr(colorf->filter_name, name)==NULL) ? -1 : 0 ;
 142 }
 143
 144
 145 /* Set the filter off a temporary colorfilters and enable it */
 146 void
 147 color_filters_set_tmp(guint8 filt_nr, gchar *filter, gboolean disabled)
 148 {
 149         gchar  *name = NULL;
 150         gchar  *tmpfilter = NULL;
 151         GSList *cfl;
 152         color_filter_t *colorf;
 153         dfilter_t      *compiled_filter;
 154         guint8 i;
 155
 156         /* Go through the tomporary filters and look for the same filter string.
 157          * If found, clear it so that a filter can be "moved" up and down the list
 158          */
 159         for ( i=1 ; i<=10 ; i++ ) {
 160                 /* If we need to reset the temporary filter (filter==NULL), don't look
 161                  * for other rules with the same filter string
 162                  */
 163                 if( i!=filt_nr && filter==NULL )
 164                         continue;
 165
 166                 name = g_strdup_printf("%s%02d",TEMP_COLOR_PREFIX,i);
 167                 cfl = g_slist_find_custom(color_filter_list, (gpointer *) name, color_filters_find_by_name_cb);
 168                 colorf = cfl->data;
 169
 170                 /* Only change the filter rule if this is the rule to change or if
 171                  * a matching filter string has been found
 172                  */
 173                 if(colorf && ( (i==filt_nr) || (strstr(filter,colorf->filter_text)!=NULL) ) ) {
 174                         /* set filter string to "frame" if we are resetting the rules
 175                          * or if we found a matching filter string which need to be cleared
 176                          */
 177                         tmpfilter = ( (filter==NULL) || (i!=filt_nr) ) ? "frame" : filter;
 178                         if (!dfilter_compile(tmpfilter, &compiled_filter)) {
 179                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 180                                     "Could not compile color filter name: \"%s\""
 181                                     " text: \"%s\".\n%s", name, filter, dfilter_error_msg);
 182                         } else {
 183                                 if (colorf->filter_text != NULL)
 184                                         g_free(colorf->filter_text);
 185                                 if (colorf->c_colorfilter != NULL)
 186                                         dfilter_free(colorf->c_colorfilter);
 187                                 colorf->filter_text = g_strdup(tmpfilter);
 188                                 colorf->c_colorfilter = compiled_filter;
 189                                 colorf->disabled = ((i!=filt_nr) ? TRUE : disabled);
 190                                 /* Remember that there are now temporary coloring filters set */
 191                                 if( filter )
 192                                         tmp_colors_set = TRUE;
 193                         }
 194                 }
 195                 g_free(name);
 196         }
 197         return;
 198 }
 199
 200 /* Reset the temporary colorfilters */
 201 void
 202 color_filters_reset_tmp()
 203 {
 204         guint8 i;
 205
 206         for ( i=1 ; i<=10 ; i++ ) {
 207             color_filters_set_tmp(i, NULL, TRUE);
 208         }
 209         /* Remember that there are now *no* temporary coloring filters set */
 210         tmp_colors_set = FALSE;
 211         return;
 212 }
 213
 214 /* delete the specified filter */
 215 void
 216 color_filter_delete(color_filter_t *colorf)
 217 {
 218         if (colorf->filter_name != NULL)
 219                 g_free(colorf->filter_name);
 220         if (colorf->filter_text != NULL)
 221                 g_free(colorf->filter_text);
 222         if (colorf->c_colorfilter != NULL)
 223                 dfilter_free(colorf->c_colorfilter);
 224         g_free(colorf);
 225 }
 226
 227 /* delete the specified filter (called from g_slist_foreach) */
 228 static void
 229 color_filter_delete_cb(gpointer filter_arg, gpointer unused _U_)
 230 {
 231         color_filter_t *colorf = filter_arg;
 232
 233         color_filter_delete(colorf);
 234 }
 235
 236 /* delete the specified list */
 237 void
 238 color_filter_list_delete(GSList **cfl)
 239 {
 240         g_slist_foreach(*cfl, color_filter_delete_cb, NULL);
 241         g_slist_free(*cfl);
 242         *cfl = NULL;
 243 }
 244
 245 /* clone a single list entries from normal to edit list */
 246 static color_filter_t *
 247 color_filter_clone(color_filter_t *colorf)
 248 {
 249         color_filter_t *new_colorf;
 250
 251         new_colorf = g_malloc(sizeof (color_filter_t));
 252         new_colorf->filter_name = g_strdup(colorf->filter_name);
 253         new_colorf->filter_text = g_strdup(colorf->filter_text);
 254         new_colorf->bg_color = colorf->bg_color;
 255         new_colorf->fg_color = colorf->fg_color;
 256         new_colorf->disabled = colorf->disabled;
 257         new_colorf->c_colorfilter = NULL;
 258         new_colorf->edit_dialog = NULL;
 259         new_colorf->selected = FALSE;
 260
 261         return new_colorf;
 262 }
 263
 264 static void
 265 color_filter_list_clone_cb(gpointer filter_arg, gpointer cfl_arg)
 266 {
 267     gpointer *cfl = cfl_arg;
 268     color_filter_t *new_colorf;
 269
 270     new_colorf = color_filter_clone(filter_arg);
 271     *cfl = g_slist_append(*cfl, new_colorf);
 272 }
 273
 274 /* clone the specified list */
 275 static GSList *
 276 color_filter_list_clone(GSList *cfl)
 277 {
 278         GSList *new_list = NULL;
 279
 280         g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);
 281
 282         return new_list;
 283 }
 284
 285 /* Initialize the filter structures (reading from file) for general running, including app startup */
 286 void
 287 color_filters_init(void)
 288 {
 289         /* delete all currently existing filters */
 290         color_filter_list_delete(&color_filter_list);
 291
 292         /* start the list with the temporary colorizing rules */
 293         color_filters_add_tmp(&color_filter_list);
 294
 295         /* try to read the users filters */
 296         if (!read_users_filters(&color_filter_list))
 297                 /* if that failed, try to read the global filters */
 298                 color_filters_read_globals(&color_filter_list);
 299 }
 300
 301 void
 302 color_filters_reload(void)
 303 {
 304         /* "move" old entries to the deleted list
 305          * we must keep them until the dissection no longer needs them */
 306         color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
 307         color_filter_list = NULL;
 308
 309         /* start the list with the temporary colorizing rules */
 310         color_filters_add_tmp(&color_filter_list);
 311
 312         /* try to read the users filters */
 313         if (!read_users_filters(&color_filter_list))
 314                 /* if that failed, try to read the global filters */
 315                 color_filters_read_globals(&color_filter_list);
 316 }
 317
 318 void
 319 color_filters_cleanup(void)
 320 {
 321         /* delete the previously deleted filters */
 322         color_filter_list_delete(&color_filter_deleted_list);
 323 }
 324
 325 static void
 326 color_filters_clone_cb(gpointer filter_arg, gpointer user_data)
 327 {
 328         color_filter_t * new_colorf = color_filter_clone(filter_arg);
 329         color_filter_add_cb (new_colorf, user_data);
 330 }
 331
 332 void
 333 color_filters_clone(gpointer user_data)
 334 {
 335     g_slist_foreach(color_filter_list, color_filters_clone_cb, user_data);
 336 }
 337
 338
 339 static void
 340 color_filter_compile_cb(gpointer filter_arg, gpointer unused _U_)
 341 {
 342         color_filter_t *colorf = filter_arg;
 343
 344         g_assert(colorf->c_colorfilter == NULL);
 345         if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
 346                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 347                 "Could not compile color filter name: \"%s\" text: \"%s\".\n%s",
 348                               colorf->filter_name, colorf->filter_text, dfilter_error_msg);
 349                 /* this filter was compilable before, so this should never happen */
 350                 /* except if the OK button of the parent window has been clicked */
 351                 /* so don't use g_assert_not_reached() but check the filters again */
 352         }
 353 }
 354
 355 static void
 356 color_filter_validate_cb(gpointer filter_arg, gpointer unused _U_)
 357 {
 358         color_filter_t *colorf = filter_arg;
 359
 360         g_assert(colorf->c_colorfilter == NULL);
 361         if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter)) {
 362                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 363                 "Removing color filter name: \"%s\" text: \"%s\".\n%s",
 364                               colorf->filter_name, colorf->filter_text, dfilter_error_msg);
 365                 /* Delete the color filter from the list of color filters. */
 366                 color_filter_valid_list = g_slist_remove(color_filter_valid_list, colorf);
 367                 color_filter_delete(colorf);
 368         }
 369 }
 370
 371 /* apply changes from the edit list */
 372 void
 373 color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl)
 374 {
 375         /* "move" old entries to the deleted list
 376          * we must keep them until the dissection no longer needs them */
 377         color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
 378         color_filter_list = NULL;
 379
 380         /* clone all list entries from tmp/edit to normal list */
 381         color_filter_valid_list = NULL;
 382         color_filter_valid_list = color_filter_list_clone(tmp_cfl);
 383         color_filter_valid_list = g_slist_concat(color_filter_valid_list,
 384                                                  color_filter_list_clone(edit_cfl) );
 385
 386         /* compile all filter */
 387         g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, NULL);
 388
 389         /* clone all list entries from tmp/edit to normal list */
 390         color_filter_list = color_filter_list_clone(color_filter_valid_list);
 391
 392         /* compile all filter */
 393         g_slist_foreach(color_filter_list, color_filter_compile_cb, NULL);
 394 }
 395
 396 gboolean
 397 color_filters_used(void)
 398 {
 399         return color_filter_list != NULL && filters_enabled;
 400 }
 401
 402 gboolean
 403 tmp_color_filters_used(void)
 404 {
 405         return tmp_colors_set;
 406 }
 407
 408 void
 409 color_filters_enable(gboolean enable)
 410 {
 411         filters_enabled = enable;
 412 }
 413
 414
 415 /* prepare the epan_dissect_t for the filter */
 416 static void
 417 prime_edt(gpointer data, gpointer user_data)
 418 {
 419         color_filter_t  *colorf = data;
 420         epan_dissect_t   *edt = user_data;
 421
 422         if (colorf->c_colorfilter != NULL)
 423                 epan_dissect_prime_dfilter(edt, colorf->c_colorfilter);
 424 }
 425
 426 /* Prime the epan_dissect_t with all the compiler
 427  * color filters in 'color_filter_list'. */
 428 void
 429 color_filters_prime_edt(epan_dissect_t *edt)
 430 {
 431         g_slist_foreach(color_filter_list, prime_edt, edt);
 432 }
 433
 434 #ifndef NEW_PACKET_LIST
 435 /* Colorize a single packet of the packet list */
 436 color_filter_t *
 437 color_filters_colorize_packet(gint row, epan_dissect_t *edt)
 438 {
 439     GSList *curr;
 440     color_filter_t *colorf;
 441
 442     /* If we have color filters, "search" for the matching one. */
 443     if (color_filters_used()) {
 444         curr = color_filter_list;
 445
 446         while(curr != NULL) {
 447             colorf = curr->data;
 448             if ( (!colorf->disabled) &&
 449                  (colorf->c_colorfilter != NULL) &&
 450                  dfilter_apply_edt(colorf->c_colorfilter, edt)) {
 451                     /* this is the filter to use, apply it to the packet list */
 452 #ifndef NEW_PACKET_LIST
 453                     packet_list_set_colors(row, &(colorf->fg_color), &(colorf->bg_color));
 454 #endif
 455                     return colorf;
 456             }
 457             curr = g_slist_next(curr);
 458         }
 459     }
 460
 461     return NULL;
 462 }
 463 #endif /* NEW_PACKET_LIST */
 464
 465 /* read filters from the given file */
 466 /* XXX - Would it make more sense to use GStrings here instead of reallocing
 467    our buffers? */
 468 static gboolean
 469 read_filters_file(FILE *f, gpointer user_data)
 470 {
 471 #define INIT_BUF_SIZE 128
 472         gchar  *name = NULL;
 473         gchar  *filter_exp = NULL;
 474         guint32 name_len = INIT_BUF_SIZE;
 475         guint32 filter_exp_len = INIT_BUF_SIZE;
 476         guint32 i = 0;
 477         gint32  c;
 478         guint16 fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
 479         gboolean disabled = FALSE;
 480         gboolean skip_end_of_line = FALSE;
 481
 482         name = g_malloc(name_len + 1);
 483         filter_exp = g_malloc(filter_exp_len + 1);
 484
 485         while (1) {
 486
 487                 if (skip_end_of_line) {
 488                         do {
 489                                 c = getc(f);
 490                         } while (c != EOF && c != '\n');
 491                         if (c == EOF)
 492                                 break;
 493                         disabled = FALSE;
 494                         skip_end_of_line = FALSE;
 495                 }
 496
 497                 while ((c = getc(f)) != EOF && isspace(c)) {
 498                         if (c == '\n') {
 499                                 continue;
 500                         }
 501                 }
 502
 503                 if (c == EOF)
 504                         break;
 505
 506                 if (c == '!') {
 507                         disabled = TRUE;
 508                         continue;
 509                 }
 510
 511                 /* skip # comments and invalid lines */
 512                 if (c != '@') {
 513                         skip_end_of_line = TRUE;
 514                         continue;
 515                 }
 516
 517                 /* we get the @ delimiter.
 518                  * Format is:
 519                  * @name@filter expression@[background r,g,b][foreground r,g,b]
 520                  */
 521
 522                 /* retrieve name */
 523                 i = 0;
 524                 while (1) {
 525                         c = getc(f);
 526                         if (c == EOF || c == '@')
 527                                 break;
 528                         if (i >= name_len) {
 529                                 /* buffer isn't long enough; double its length.*/
 530                                 name_len *= 2;
 531                                 name = g_realloc(name, name_len + 1);
 532                         }
 533                         name[i++] = c;
 534                 }
 535                 name[i] = '\0';
 536
 537                 if (c == EOF) {
 538                         break;
 539                 } else if (i == 0) {
 540                         skip_end_of_line = TRUE;
 541                         continue;
 542                 }
 543
 544                 /* retrieve filter expression */
 545                 i = 0;
 546                 while (1) {
 547                         c = getc(f);
 548                         if (c == EOF || c == '@')
 549                                 break;
 550                         if (i >= filter_exp_len) {
 551                                 /* buffer isn't long enough; double its length.*/
 552                                 filter_exp_len *= 2;
 553                                 filter_exp = g_realloc(filter_exp, filter_exp_len + 1);
 554                         }
 555                         filter_exp[i++] = c;
 556                 }
 557                 filter_exp[i] = '\0';
 558
 559                 if (c == EOF) {
 560                         break;
 561                 } else if (i == 0) {
 562                         skip_end_of_line = TRUE;
 563                         continue;
 564                 }
 565
 566                 /* retrieve background and foreground colors */
 567                 if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
 568                         &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
 569
 570                         /* we got a complete color filter */
 571
 572                         color_t bg_color, fg_color;
 573                         color_filter_t *colorf;
 574                         dfilter_t *temp_dfilter;
 575
 576                         if (!dfilter_compile(filter_exp, &temp_dfilter)) {
 577                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 578                                 "Could not compile color filter %s from saved filters.\n%s",
 579                                               name, dfilter_error_msg);
 580                                 skip_end_of_line = TRUE;
 581                                 continue;
 582                         }
 583
 584                         if (!initialize_color(&fg_color, fg_r, fg_g, fg_b)) {
 585                                 /* oops */
 586                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 587                                     "Could not allocate foreground color "
 588                                     "specified in input file for %s.", name);
 589                                 dfilter_free(temp_dfilter);
 590                                 skip_end_of_line = TRUE;
 591                                 continue;
 592                         }
 593                         if (!initialize_color(&bg_color, bg_r, bg_g, bg_b)) {
 594                                 /* oops */
 595                                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 596                                     "Could not allocate background color "
 597                                     "specified in input file for %s.", name);
 598                                 dfilter_free(temp_dfilter);
 599                                 skip_end_of_line = TRUE;
 600                                 continue;
 601                         }
 602
 603                         colorf = color_filter_new(name, filter_exp, &bg_color,
 604                             &fg_color, disabled);
 605                         if(user_data == &color_filter_list) {
 606                                 GSList **cfl = (GSList **)user_data;
 607
 608                                 /* internal call */
 609                                 colorf->c_colorfilter = temp_dfilter;
 610                                 *cfl = g_slist_append(*cfl, colorf);
 611                         } else {
 612                                 /* external call */
 613                                 /* just editing, don't need the compiled filter */
 614                                 dfilter_free(temp_dfilter);
 615                                 color_filter_add_cb (colorf, user_data);
 616                         }
 617                 }    /* if sscanf */
 618
 619                 skip_end_of_line = TRUE;
 620         }
 621
 622         g_free(name);
 623         g_free(filter_exp);
 624         return TRUE;
 625 }
 626
 627 /* read filters from the user's filter file */
 628 static gboolean
 629 read_users_filters(GSList **cfl)
 630 {
 631         gchar *path;
 632         FILE *f;
 633         gboolean ret;
 634
 635         /* decide what file to open (from dfilter code) */
 636         path = get_persconffile_path("colorfilters", TRUE, FALSE);
 637         if ((f = ws_fopen(path, "r")) == NULL) {
 638                 if (errno != ENOENT) {
 639                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 640                             "Could not open filter file\n\"%s\": %s.", path,
 641                             strerror(errno));
 642                 }
 643                 g_free(path);
 644                 return FALSE;
 645         }
 646         g_free(path);
 647         path = NULL;
 648
 649         ret = read_filters_file(f, cfl);
 650         fclose(f);
 651         return ret;
 652 }
 653
 654 /* read filters from the filter file */
 655 gboolean
 656 color_filters_read_globals(gpointer user_data)
 657 {
 658         gchar *path;
 659         FILE *f;
 660         gboolean ret;
 661
 662         /* decide what file to open (from dfilter code) */
 663         path = get_datafile_path("colorfilters");
 664         if ((f = ws_fopen(path, "r")) == NULL) {
 665                 if (errno != ENOENT) {
 666                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 667                             "Could not open global filter file\n\"%s\": %s.", path,
 668                             strerror(errno));
 669                 }
 670                 g_free(path);
 671                 return FALSE;
 672         }
 673         g_free(path);
 674         path = NULL;
 675
 676         ret = read_filters_file(f, user_data);
 677         fclose(f);
 678         return ret;
 679 }
 680
 681 /* read filters from some other filter file (import) */
 682 gboolean
 683 color_filters_import(gchar *path, gpointer user_data)
 684 {
 685         FILE *f;
 686         gboolean ret;
 687
 688         if ((f = ws_fopen(path, "r")) == NULL) {
 689                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 690                     "Could not open\n%s\nfor reading: %s.",
 691                     path, strerror(errno));
 692                 return FALSE;
 693         }
 694
 695         ret = read_filters_file(f, user_data);
 696         fclose(f);
 697         return ret;
 698 }
 699
 700 struct write_filter_data
 701 {
 702   FILE * f;
 703   gboolean only_selected;
 704 };
 705
 706 /* save a single filter */
 707 static void
 708 write_filter(gpointer filter_arg, gpointer data_arg)
 709 {
 710         struct write_filter_data *data = data_arg;
 711         color_filter_t *colorf = filter_arg;
 712         FILE *f = data->f;
 713
 714         if ( (colorf->selected || !data->only_selected) &&
 715              (strstr(colorf->filter_name,TEMP_COLOR_PREFIX)==NULL) ) {
 716                 fprintf(f,"%s@%s@%s@[%d,%d,%d][%d,%d,%d]\n",
 717                     colorf->disabled ? "!" : "",
 718                     colorf->filter_name,
 719                     colorf->filter_text,
 720                     colorf->bg_color.red,
 721                     colorf->bg_color.green,
 722                     colorf->bg_color.blue,
 723                     colorf->fg_color.red,
 724                     colorf->fg_color.green,
 725                     colorf->fg_color.blue);
 726         }
 727 }
 728
 729 /* save filters in a filter file */
 730 static gboolean
 731 write_filters_file(GSList *cfl, FILE *f, gboolean only_selected)
 732 {
 733         struct write_filter_data data;
 734
 735         data.f = f;
 736         data.only_selected = only_selected;
 737
 738         fprintf(f,"# DO NOT EDIT THIS FILE!  It was created by Wireshark\n");
 739         g_slist_foreach(cfl, write_filter, &data);
 740         return TRUE;
 741 }
 742
 743 /* save filters in users filter file */
 744 gboolean
 745 color_filters_write(GSList *cfl)
 746 {
 747         gchar *pf_dir_path;
 748         gchar *path;
 749         FILE *f;
 750
 751         /* Create the directory that holds personal configuration files,
 752            if necessary.  */
 753         if (create_persconffile_dir(&pf_dir_path) == -1) {
 754                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 755                     "Can't create directory\n\"%s\"\nfor color files: %s.",
 756                     pf_dir_path, strerror(errno));
 757                 g_free(pf_dir_path);
 758                 return FALSE;
 759         }
 760
 761         path = get_persconffile_path("colorfilters", TRUE, TRUE);
 762         if ((f = ws_fopen(path, "w+")) == NULL) {
 763                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 764                     "Could not open\n%s\nfor writing: %s.",
 765                     path, strerror(errno));
 766                 g_free(path);
 767                 return FALSE;
 768         }
 769         g_free(path);
 770         write_filters_file(cfl, f, FALSE);
 771         fclose(f);
 772         return TRUE;
 773 }
 774
 775 /* save filters in some other filter file (export) */
 776 gboolean
 777 color_filters_export(gchar *path, GSList *cfl, gboolean only_marked)
 778 {
 779         FILE *f;
 780
 781         if ((f = ws_fopen(path, "w+")) == NULL) {
 782                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 783                     "Could not open\n%s\nfor writing: %s.",
 784                     path, strerror(errno));
 785                 return FALSE;
 786         }
 787         write_filters_file(cfl, f, only_marked);
 788         fclose(f);
 789         return TRUE;
 790 }
 791