### Bug Summary

File: | epan/color_filters.c
Warning: | line 707, column 13 File position of the stream might be 'indeterminate' after a failed operation. Can cause undefined behavior

### Annotated Source Code

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1 | /* color_filters.c
2 | * Routines for color filters
3 | *
4 | * Wireshark - Network traffic analyzer
5 | * By Gerald Combs <gerald@wireshark.org>
6 | * Copyright 1998 Gerald Combs
7 | *
8 | * SPDX-License-Identifier: GPL-2.0-or-later
9 | */
10 | /*
11 | * Updated 1 Dec 10 jjm
12 | */
13 |
14 | #include <config.h>
15 | #define WS_LOG_DOMAIN"Epan" LOG_DOMAIN_EPAN"Epan"
16 |
17 | #include <glib.h>
18 |
19 | #include <errno(*__errno_location ()).h>
20 | #include <stdio.h>
21 | #include <stdlib.h>
22 | #include <string.h>
23 |
24 | #include <wsutil/application_flavor.h>
25 | #include <wsutil/filesystem.h>
26 | #include <wsutil/file_util.h>
27 | #include <wsutil/report_message.h>
28 | #include <wsutil/wslog.h>
29 | #include <wsutil/ws_assert.h>
30 |
31 | #include <epan/packet.h>
32 | #include "color_filters.h"
33 | #include "file.h"
34 | #include <epan/dfilter/dfilter.h>
35 | #include <epan/prefs.h>
36 | #include <epan/epan_dissect.h>
37 |
38 | /*
39 | * Each line in the colorfilters file has the following format:
40 | *
41 | * @<filter name>@<filter string>@[<background>][<foreground>]
42 | * Background and foreground colors are 16-bit comma-separated RGB
43 | * triplets. Colors are 16 bits because that's what GdkColor used.
44 | * We might want to use a more standard, copy+paste-able color scheme
45 | * such as #RRGGBB instead.
46 | */
47 |
48 | #define RED_COMPONENT(x)(uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255))
49 | #define GREEN_COMPONENT(x)(uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255))
50 | #define BLUE_COMPONENT(x)(uint16_t) ( (((x) & 0xff) * 65535 / 255)) (uint16_t) ( (((x) & 0xff) * 65535 / 255))
51 |
52 | static int read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb);
53 |
54 | /* the currently active filters */
55 | static GSList *color_filter_list;
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;
60 | static GSList *color_filter_valid_list;
61 |
62 | /* Color Filters can en-/disabled. */
63 | static bool_Bool filters_enabled = true1;
64 |
65 | /* Remember if there are temporary coloring filters set to
66 | * add sensitivity to the "Reset Coloring 1-10" menu item
67 | */
68 | static bool_Bool tmp_colors_set;
69 |
70 | /* Create a new filter */
71 | color_filter_t *
72 | color_filter_new(const char *name, /* The name of the filter to create */
73 | const char *filter_string, /* The string representing the filter */
74 | color_t *bg_color, /* The background color */
75 | color_t *fg_color, /* The foreground color */
76 | bool_Bool disabled) /* Is the filter disabled? */
77 | {
78 | color_filter_t *colorf;
79 |
80 | colorf = g_new0(color_filter_t, 1)((color_filter_t *) g_malloc0_n ((1), sizeof (color_filter_t) ));
81 | colorf->filter_name = g_strdup(name)g_strdup_inline (name);
82 | colorf->filter_text = g_strdup(filter_string)g_strdup_inline (filter_string);
83 | colorf->bg_color = *bg_color;
84 | colorf->fg_color = *fg_color;
85 | colorf->disabled = disabled;
86 | return colorf;
87 | }
88 |
89 | /* Add ten empty (temporary) colorfilters for easy coloring */
90 | static void
91 | color_filters_add_tmp(GSList **cfl)
92 | {
93 | char *name = NULL((void*)0);
94 | uint32_t i;
95 | char** bg_colors;
96 | char** fg_colors;
97 | unsigned long cval;
98 | color_t bg_color, fg_color;
99 | color_filter_t *colorf;
100 |
101 | ws_assert(strlen(prefs.gui_colorized_fg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_fg)==69) ) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c" , 101, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_fg)==69" ); } while (0);
102 | ws_assert(strlen(prefs.gui_colorized_bg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_bg)==69) ) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c" , 102, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_bg)==69" ); } while (0);
103 | fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
104 | bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);
105 |
106 | for ( i=1 ; i<=10 ; i++ ) {
107 | name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___" ,i);
108 |
109 | /* retrieve background and foreground colors */
110 | cval = strtoul(fg_colors[i-1], NULL((void*)0), 16);
111 | fg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255) );
112 | fg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
113 | fg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
114 | cval = strtoul(bg_colors[i-1], NULL((void*)0), 16);
115 | bg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255) );
116 | bg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
117 | bg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
118 | colorf = color_filter_new(name, NULL((void*)0), &bg_color, &fg_color, true1);
119 | colorf->filter_text = g_strdup("frame")g_strdup_inline ("frame");
120 | *cfl = g_slist_append(*cfl, colorf);
121 |
122 | g_free(name);
123 | }
124 |
125 | g_strfreev(fg_colors);
126 | g_strfreev(bg_colors);
127 | }
128 |
129 | static int
130 | color_filters_find_by_name_cb(const void *arg1, const void *arg2)
131 | {
132 | const color_filter_t *colorf = (const color_filter_t *)arg1;
133 | const char *name = (const char *)arg2;
134 |
135 | return strcmp(colorf->filter_name, name);
136 | }
137 |
138 | /* Get the filter of a temporary color filter */
139 | char*
140 | color_filters_get_tmp(uint8_t filt_nr)
141 | {
142 | char* name = NULL((void*)0);
143 | char* filter = NULL((void*)0);
144 | GSList* cfl;
145 | color_filter_t* colorf;
146 | /* Only perform a lookup if the supplied filter number is in the expected range */
147 | if (filt_nr < 1 || filt_nr > 10)
148 | return NULL((void*)0);
149 |
150 | name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filt_nr)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___" , filt_nr);
151 | cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
152 | colorf = (color_filter_t*)cfl->data;
153 |
154 | if (!colorf->disabled)
155 | filter = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
156 |
157 | g_free(name);
158 |
159 | return filter;
160 | }
161 |
162 | /* Set the filter off a temporary colorfilters and enable it */
163 | bool_Bool
164 | color_filters_set_tmp(uint8_t filt_nr, const char *filter, bool_Bool disabled, char **err_msg)
165 | {
166 | char *name = NULL((void*)0);
167 | const char *tmpfilter = NULL((void*)0);
168 | GSList *cfl;
169 | color_filter_t *colorf;
170 | dfilter_t *compiled_filter;
171 | uint8_t i;
172 | df_error_t *df_err = NULL((void*)0);
173 | /* Go through the temporary filters and look for the same filter string.
174 | * If found, clear it so that a filter can be "moved" up and down the list
175 | */
176 | for ( i=1 ; i<=10 ; i++ ) {
177 | /* If we need to reset the temporary filter (filter==NULL), don't look
178 | * for other rules with the same filter string
179 | */
180 | if( i!=filt_nr && filter==NULL((void*)0) )
181 | continue;
182 |
183 | name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___" ,i);
184 | cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
185 | colorf = (color_filter_t *)cfl->data;
186 |
187 | /* Only change the filter rule if this is the rule to change or if
188 | * a matching filter string has been found
189 | */
190 | if(colorf && ( i == filt_nr || filter == NULL((void*)0) || !strcmp(filter, colorf->filter_text) ) ) {
191 | /* set filter string to "frame" if we are resetting the rules
192 | * or if we found a matching filter string which need to be cleared
193 | */
194 | tmpfilter = ( (filter==NULL((void*)0)) || (i!=filt_nr) ) ? "frame" : filter;
195 | if (!dfilter_compile(tmpfilter, &compiled_filter, &df_err)dfilter_compile_full(tmpfilter, &compiled_filter, &df_err , (1U << 1)|(1U << 2), __func__)) {
196 | *err_msg = ws_strdup_printf( "Could not compile color filter name: \"%s\" text: \"%s\".\n%s", name, filter, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s" , name, filter, df_err->msg);
197 | df_error_free(&df_err);
198 | g_free(name);
199 | return false0;
200 | } else {
201 | g_free(colorf->filter_text);
202 | dfilter_free(colorf->c_colorfilter);
203 | colorf->filter_text = g_strdup(tmpfilter)g_strdup_inline (tmpfilter);
204 | colorf->c_colorfilter = compiled_filter;
205 | colorf->disabled = ((i!=filt_nr) ? true1 : disabled);
206 | /* Remember that there are now temporary coloring filters set */
207 | if( filter )
208 | tmp_colors_set = true1;
209 | }
210 | }
211 | g_free(name);
212 | }
213 | return true1;
214 | }
215 |
216 | const color_filter_t *
217 | color_filters_tmp_color(uint8_t filter_num) {
218 | char *name;
219 | color_filter_t *colorf = NULL((void*)0);
220 | GSList *cfl;
221 |
222 | name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filter_num)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___" , filter_num);
223 | cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
224 | if (cfl) {
225 | colorf = (color_filter_t *)cfl->data;
226 | }
227 | g_free(name);
228 |
229 | return colorf;
230 | }
231 |
232 | /* Reset the temporary colorfilters */
233 | bool_Bool
234 | color_filters_reset_tmp(char **err_msg)
235 | {
236 | uint8_t i;
237 |
238 | for ( i=1 ; i<=10 ; i++ ) {
239 | if (!color_filters_set_tmp(i, NULL((void*)0), true1, err_msg))
240 | return false0;
241 | }
242 | /* Remember that there are now *no* temporary coloring filters set */
243 | tmp_colors_set = false0;
244 | return true1;
245 | }
246 |
247 | /* delete the specified filter */
248 | void
249 | color_filter_delete(color_filter_t *colorf)
250 | {
251 | g_free(colorf->filter_name);
252 | g_free(colorf->filter_text);
253 | dfilter_free(colorf->c_colorfilter);
254 | g_free(colorf);
255 | }
256 |
257 | /* delete the specified filter (called from g_slist_foreach) */
258 | static void
259 | color_filter_delete_cb(void *filter_arg)
260 | {
261 | color_filter_t *colorf = (color_filter_t *)filter_arg;
262 |
263 | color_filter_delete(colorf);
264 | }
265 |
266 | /* delete the specified list */
267 | void
268 | color_filter_list_delete(GSList **cfl)
269 | {
270 | g_slist_free_full(*cfl, color_filter_delete_cb);
271 | *cfl = NULL((void*)0);
272 | }
273 |
274 | /* clone a single list entries from normal to edit list */
275 | static color_filter_t *
276 | color_filter_clone(color_filter_t *colorf)
277 | {
278 | color_filter_t *new_colorf;
279 |
280 | new_colorf = g_new(color_filter_t, 1)((color_filter_t *) g_malloc_n ((1), sizeof (color_filter_t)) );
281 | new_colorf->filter_name = g_strdup(colorf->filter_name)g_strdup_inline (colorf->filter_name);
282 | new_colorf->filter_text = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
283 | new_colorf->bg_color = colorf->bg_color;
284 | new_colorf->fg_color = colorf->fg_color;
285 | new_colorf->disabled = colorf->disabled;
286 | new_colorf->c_colorfilter = NULL((void*)0);
287 |
288 | return new_colorf;
289 | }
290 |
291 | static void
292 | color_filter_list_clone_cb(void *filter_arg, void *cfl_arg)
293 | {
294 | GSList **cfl = (GSList **)cfl_arg;
295 | color_filter_t *new_colorf;
296 |
297 | new_colorf = color_filter_clone((color_filter_t *)filter_arg);
298 | *cfl = g_slist_append(*cfl, new_colorf);
299 | }
300 |
301 | /* clone the specified list */
302 | static GSList *
303 | color_filter_list_clone(GSList *cfl)
304 | {
305 | GSList *new_list = NULL((void*)0);
306 |
307 | g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);
308 |
309 | return new_list;
310 | }
311 |
312 | static bool_Bool
313 | color_filters_get(char** err_msg, color_filter_add_cb_func add_cb)
314 | {
315 | char *path;
316 | FILE *f;
317 | int ret;
318 |
319 | /* start the list with the temporary colorizing rules */
320 | color_filters_add_tmp(&color_filter_list);
321 |
322 | /*
323 | * Try to get the user's filters.
324 | *
325 | * Get the path for the file that would have their filters, and
326 | * try to open it.
327 | */
328 | path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1);
329 | if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
330 | if (errno(*__errno_location ()) != ENOENT2) {
331 | /* Error trying to open the file; give up. */
332 | *err_msg = ws_strdup_printf("Could not open filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())))
333 | g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())));
334 | g_free(path);
335 | return false0;
336 | }
337 | /* They don't have any filters; try to read the global filters */
338 | g_free(path);
339 | return color_filters_read_globals(&color_filter_list, err_msg, add_cb);
340 | }
341 |
342 | /*
343 | * We've opened it; try to read it.
344 | */
345 | ret = read_filters_file(path, f, &color_filter_list, add_cb);
346 | if (ret != 0) {
347 | *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())))
348 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())));
349 | fclose(f);
350 | g_free(path);
351 | return false0;
352 | }
353 |
354 | /* Success. */
355 | fclose(f);
356 | g_free(path);
357 | return true1;
358 | }
359 |
360 | /* Initialize the filter structures (reading from file) for general running, including app startup */
361 | bool_Bool
362 | color_filters_init(char** err_msg, color_filter_add_cb_func add_cb)
363 | {
364 | /* delete all currently existing filters */
365 | color_filter_list_delete(&color_filter_list);
366 |
367 | /* now try to construct the filters list */
368 | return color_filters_get(err_msg, add_cb);
369 | }
370 |
371 | bool_Bool
372 | color_filters_reload(char** err_msg, color_filter_add_cb_func add_cb)
373 | {
374 | /* "move" old entries to the deleted list
375 | * we must keep them until the dissection no longer needs them */
376 | color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
377 | color_filter_list = NULL((void*)0);
378 |
379 | /* now try to construct the filters list */
380 | return color_filters_get(err_msg, add_cb);
381 | }
382 |
383 | void
384 | color_filters_cleanup(void)
385 | {
386 | /* delete the previously deleted filters */
387 | color_filter_list_delete(&color_filter_deleted_list);
388 | }
389 |
390 | typedef struct _color_clone
391 | {
392 | void *user_data;
393 | color_filter_add_cb_func add_cb;
394 | } color_clone_t;
395 |
396 | static void
397 | color_filters_clone_cb(void *filter_arg, void *user_data)
398 | {
399 | color_clone_t* clone_data = (color_clone_t*)user_data;
400 | color_filter_t * new_colorf = color_filter_clone((color_filter_t *)filter_arg);
401 |
402 | clone_data->add_cb (new_colorf, clone_data->user_data);
403 | }
404 |
405 | void
406 | color_filters_clone(void *user_data, color_filter_add_cb_func add_cb)
407 | {
408 | color_clone_t clone_data;
409 |
410 | clone_data.user_data = user_data;
411 | clone_data.add_cb = add_cb;
412 | g_slist_foreach(color_filter_list, color_filters_clone_cb, &clone_data);
413 | }
414 |
415 |
416 | static void
417 | color_filter_compile_cb(void *filter_arg, void *err)
418 | {
419 | color_filter_t *colorf = (color_filter_t *)filter_arg;
420 | char **err_msg = (char**)err;
421 | df_error_t *df_err = NULL((void*)0);
422 |
423 | ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void* )0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c" , 423, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)" ); } while (0);
424 |
425 | /* If the filter is disabled it doesn't matter if it compiles or not. */
426 | if (colorf->disabled) return;
427 |
428 | if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf-> c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__ )) {
429 | *err_msg = ws_strdup_printf("Could not compile color filter name: \"%s\" text: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s" , colorf->filter_name, colorf->filter_text, df_err-> msg)
430 | colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s" , colorf->filter_name, colorf->filter_text, df_err-> msg);
431 | df_error_free(&df_err);
432 | /* this filter was compilable before, so this should never happen */
433 | /* except if the OK button of the parent window has been clicked */
434 | /* so don't use ws_assert_not_reached() but check the filters again */
435 | }
436 | }
437 |
438 | static void
439 | color_filter_validate_cb(void *filter_arg, void *err)
440 | {
441 | color_filter_t *colorf = (color_filter_t *)filter_arg;
442 | char **err_msg = (char**)err;
443 | df_error_t *df_err = NULL((void*)0);
444 |
445 | ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void* )0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c" , 445, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)" ); } while (0);
446 |
447 | /* If the filter is disabled it doesn't matter if it compiles or not. */
448 | if (colorf->disabled) return;
449 |
450 | if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf-> c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__ )) {
451 | *err_msg = ws_strdup_printf("Disabling color filter name: \"%s\" filter: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s" , colorf->filter_name, colorf->filter_text, df_err-> msg)
452 | colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s" , colorf->filter_name, colorf->filter_text, df_err-> msg);
453 | df_error_free(&df_err);
454 |
455 | /* Disable the color filter in the list of color filters. */
456 | colorf->disabled = true1;
457 | }
458 |
459 | /* XXX: What if the color filter tests "frame.coloring_rule.name" or
460 | * "frame.coloring_rule.string"?
461 | */
462 | }
463 |
464 | /* apply changes from the edit list */
465 | bool_Bool
466 | color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl, char** err_msg)
467 | {
468 | bool_Bool ret = true1;
469 |
470 | *err_msg = NULL((void*)0);
471 |
472 | /* "move" old entries to the deleted list
473 | * we must keep them until the dissection no longer needs them */
474 | color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
475 | color_filter_list = NULL((void*)0);
476 |
477 | /* clone all list entries from tmp/edit to normal list */
478 | color_filter_list_delete(&color_filter_valid_list);
479 | color_filter_valid_list = color_filter_list_clone(tmp_cfl);
480 | color_filter_valid_list = g_slist_concat(color_filter_valid_list,
481 | color_filter_list_clone(edit_cfl) );
482 |
483 | /* compile all filter */
484 | g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, err_msg);
485 | if (*err_msg != NULL((void*)0)) {
486 | ret = false0;
487 | }
488 |
489 | /* clone all list entries from tmp/edit to normal list */
490 | color_filter_list = color_filter_list_clone(color_filter_valid_list);
491 |
492 | /* compile all filter */
493 | g_slist_foreach(color_filter_list, color_filter_compile_cb, err_msg);
494 | if (*err_msg != NULL((void*)0)) {
495 | ret = false0;
496 | }
497 |
498 | return ret;
499 | }
500 |
501 | bool_Bool
502 | color_filters_used(void)
503 | {
504 | return color_filter_list != NULL((void*)0) && filters_enabled;
505 | }
506 |
507 | bool_Bool
508 | tmp_color_filters_used(void)
509 | {
510 | return tmp_colors_set;
511 | }
512 |
513 | /* prepare the epan_dissect_t for the filter */
514 | static void
515 | prime_edt(void *data, void *user_data)
516 | {
517 | color_filter_t *colorf = (color_filter_t *)data;
518 | epan_dissect_t *edt = (epan_dissect_t *)user_data;
519 |
520 | if (colorf->c_colorfilter != NULL((void*)0))
521 | epan_dissect_prime_with_dfilter(edt, colorf->c_colorfilter);
522 | }
523 |
524 | /* Prime the epan_dissect_t with all the compiler
525 | * color filters in 'color_filter_list'. */
526 | void
527 | color_filters_prime_edt(epan_dissect_t *edt)
528 | {
529 | if (color_filters_used())
530 | g_slist_foreach(color_filter_list, prime_edt, edt);
531 | }
532 |
533 | static int
534 | find_hfid(const void *data, const void *user_data)
535 | {
536 | color_filter_t *colorf = (color_filter_t *)data;
537 | int hfid = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
538 |
539 | if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
540 | if (dfilter_interested_in_field(colorf->c_colorfilter, hfid)) {
541 | return 0;
542 | }
543 | }
544 | return -1;
545 | }
546 |
547 | bool_Bool
548 | color_filters_use_hfid(int hfid)
549 | {
550 | GSList *item = NULL((void*)0);
551 | if (color_filters_used())
552 | item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(hfid)((gpointer) (glong) (hfid)), find_hfid);
553 | return (item != NULL((void*)0));
554 | }
555 |
556 | static int
557 | find_proto(const void *data, const void *user_data)
558 | {
559 | color_filter_t *colorf = (color_filter_t *)data;
560 | int proto_id = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
561 |
562 | if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
563 | if (dfilter_interested_in_proto(colorf->c_colorfilter, proto_id)) {
564 | return 0;
565 | }
566 | }
567 | return -1;
568 | }
569 |
570 | bool_Bool
571 | color_filters_use_proto(int proto_id)
572 | {
573 | GSList *item = NULL((void*)0);
574 | if (color_filters_used())
575 | item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(proto_id)((gpointer) (glong) (proto_id)), find_proto);
576 | return (item != NULL((void*)0));
577 | }
578 |
579 | /* * Return the color_t for later use */
580 | const color_filter_t *
581 | color_filters_colorize_packet(epan_dissect_t *edt)
582 | {
583 | GSList *curr;
584 | color_filter_t *colorf;
585 |
586 | /* If we have color filters, "search" for the matching one. */
587 | if ((edt->tree != NULL((void*)0)) && (color_filters_used())) {
588 | curr = color_filter_list;
589 |
590 | while(curr != NULL((void*)0)) {
591 | colorf = (color_filter_t *)curr->data;
592 | if ( (!colorf->disabled) &&
593 | (colorf->c_colorfilter != NULL((void*)0)) &&
594 | dfilter_apply_edt(colorf->c_colorfilter, edt)) {
595 | return colorf;
596 | }
597 | curr = g_slist_next(curr)((curr) ? (((GSList *)(curr))->next) : ((void*)0));
598 | }
599 | }
600 |
601 | return NULL((void*)0);
602 | }
603 |
604 | /* read filters from the given file */
605 | /* XXX - Would it make more sense to use GStrings here instead of reallocing
606 | our buffers? */
607 | static int
608 | read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb)
609 | {
610 | #define INIT_BUF_SIZE128 128
611 | char *name;
612 | char *filter_exp;
613 | uint32_t name_len = INIT_BUF_SIZE128;
614 | uint32_t filter_exp_len = INIT_BUF_SIZE128;
615 | uint32_t i = 0;
616 | int c;
617 | uint16_t fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
618 | bool_Bool disabled = false0;
619 | bool_Bool skip_end_of_line = false0;
620 | int ret = 0;
621 |
622 | name = (char *)g_malloc(name_len + 1);
623 | filter_exp = (char *)g_malloc(filter_exp_len + 1);
624 |
625 | while (1) {
3 | ← | Loop condition is true. Entering loop body | →
37 | ← | Loop condition is true. Entering loop body | →
626 |
627 | if (skip_end_of_line
3.1 | 'skip_end_of_line' is false
37.1 | 'skip_end_of_line' is true
) {
38 | ← | Taking true branch | →
628 | do {
41 | ← | Loop condition is false. Exiting loop | →
629 | c = ws_getc_unlockedgetc_unlocked(f);
630 | } while (c != EOF(-1) && c != '\n');
39 | ← | Assuming the condition is true | →
40 | ← | Assuming the condition is false | →
631 | if (c == EOF(-1))
42 | ← | Taking false branch | →
632 | break;
633 | disabled = false0;
634 | skip_end_of_line = false0;
635 | }
636 |
637 | while ((c = ws_getc_unlockedgetc_unlocked(f)) != EOF(-1) && g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)) {
4 | ← | Assuming the condition is true | →
5 | ← | Loop condition is false. Execution continues on line 643 | →
43 | ← | Assuming the condition is true | →
44 | ← | Loop condition is false. Execution continues on line 643 | →
638 | if (c == '\n') {
639 | continue;
640 | }
641 | }
642 |
643 | if (c == EOF(-1))
6 | ← | Taking false branch | →
45 | ← | Taking false branch | →
644 | break;
645 |
646 | if (c == '!') {
7 | ← | Assuming the condition is false | →
8 | ← | Taking false branch | →
46 | ← | Assuming the condition is false | →
47 | ← | Taking false branch | →
647 | disabled = true1;
648 | continue;
649 | }
650 |
651 | /* skip # comments and invalid lines */
652 | if (c != '@') {
9 | ← | Assuming the condition is false | →
10 | ← | Taking false branch | →
48 | ← | Assuming the condition is false | →
49 | ← | Taking false branch | →
653 | skip_end_of_line = true1;
654 | continue;
655 | }
656 |
657 | /* we get the @ delimiter.
658 | * Format is:
659 | * @name@filter expression@[background r,g,b][foreground r,g,b]
660 | */
661 |
662 | /* retrieve name */
663 | i = 0;
664 | while (1) {
11 | ← | Loop condition is true. Entering loop body | →
16 | ← | Loop condition is true. Entering loop body | →
50 | ← | Loop condition is true. Entering loop body | →
55 | ← | Loop condition is true. Entering loop body | →
665 | c = ws_getc_unlockedgetc_unlocked(f);
666 | if (c == EOF(-1) || c == '@')
12 | ← | Assuming the condition is false | →
13 | ← | Assuming the condition is false | →
14 | ← | Taking false branch | →
17 | ← | Assuming the condition is false | →
18 | ← | Assuming the condition is true | →
19 | ← | Taking true branch | →
51 | ← | Assuming the condition is false | →
52 | ← | Assuming the condition is false | →
53 | ← | Taking false branch | →
56 | ← | Assuming the condition is false | →
57 | ← | Assuming the condition is true | →
58 | ← | Taking true branch | →
667 | break;
20 | ← | Execution continues on line 675 | →
59 | ← | Execution continues on line 675 | →
668 | if (i
14.1 | 'i' is < 'name_len'
53.1 | 'i' is < 'name_len'
>= name_len) {
15 | ← | Taking false branch | →
54 | ← | Taking false branch | →
669 | /* buffer isn't long enough; double its length.*/
670 | name_len *= 2;
671 | name = (char *)g_realloc(name, name_len + 1);
672 | }
673 | name[i++] = c;
674 | }
675 | name[i] = '\0';
676 |
677 | if (c == EOF(-1)) {
21 | ← | Taking false branch | →
60 | ← | Taking false branch | →
678 | break;
679 | } else if (i
21.1 | 'i' is not equal to 0
60.1 | 'i' is not equal to 0
== 0) {
22 | ← | Taking false branch | →
61 | ← | Taking false branch | →
680 | skip_end_of_line = true1;
681 | continue;
682 | }
683 |
684 | /* retrieve filter expression */
685 | i = 0;
686 | while (1) {
23 | ← | Loop condition is true. Entering loop body | →
28 | ← | Loop condition is true. Entering loop body | →
62 | ← | Loop condition is true. Entering loop body | →
67 | ← | Loop condition is true. Entering loop body | →
687 | c = ws_getc_unlockedgetc_unlocked(f);
688 | if (c == EOF(-1) || c == '@')
24 | ← | Assuming the condition is false | →
25 | ← | Assuming the condition is false | →
26 | ← | Taking false branch | →
29 | ← | Assuming the condition is false | →
30 | ← | Assuming the condition is true | →
31 | ← | Taking true branch | →
63 | ← | Assuming the condition is false | →
64 | ← | Assuming the condition is false | →
65 | ← | Taking false branch | →
68 | ← | Assuming the condition is false | →
69 | ← | Assuming the condition is true | →
70 | ← | Taking true branch | →
689 | break;
32 | ← | Execution continues on line 697 | →
71 | ← | Execution continues on line 697 | →
690 | if (i
26.1 | 'i' is < 'filter_exp_len'
65.1 | 'i' is < 'filter_exp_len'
>= filter_exp_len) {
27 | ← | Taking false branch | →
66 | ← | Taking false branch | →
691 | /* buffer isn't long enough; double its length.*/
692 | filter_exp_len *= 2;
693 | filter_exp = (char *)g_realloc(filter_exp, filter_exp_len + 1);
694 | }
695 | filter_exp[i++] = c;
696 | }
697 | filter_exp[i] = '\0';
698 |
699 | if (c == EOF(-1)) {
33 | ← | Taking false branch | →
72 | ← | Taking false branch | →
700 | break;
701 | } else if (i
33.1 | 'i' is not equal to 0
72.1 | 'i' is not equal to 0
== 0) {
34 | ← | Taking false branch | →
73 | ← | Taking false branch | →
702 | skip_end_of_line = true1;
703 | continue;
704 | }
705 |
706 | /* retrieve background and foreground colors */
707 | if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
35 | ← | Assuming this stream operation fails | →
36 | ← | Taking false branch | →
74 | ← | File position of the stream might be 'indeterminate' after a failed operation. Can cause undefined behavior
708 | &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
709 |
710 | /* we got a complete color filter */
711 |
712 | color_t bg_color, fg_color;
713 | color_filter_t *colorf;
714 | dfilter_t *temp_dfilter = NULL((void*)0);
715 | df_error_t *df_err = NULL((void*)0);
716 |
717 | if (!disabled && !dfilter_compile(filter_exp, &temp_dfilter, &df_err)dfilter_compile_full(filter_exp, &temp_dfilter, &df_err , (1U << 1)|(1U << 2), __func__)) {
718 | report_warning("Disabling color filter: Could not compile \"%s\" in colorfilters file \"%s\".\n%s", name, path, df_err->msg);
719 | df_error_free(&df_err);
720 |
721 | /* skip_end_of_line = true; */
722 | disabled = true1;
723 | }
724 |
725 | fg_color.red = fg_r;
726 | fg_color.green = fg_g;
727 | fg_color.blue = fg_b;
728 |
729 | bg_color.red = bg_r;
730 | bg_color.green = bg_g;
731 | bg_color.blue = bg_b;
732 |
733 | colorf = color_filter_new(name, filter_exp, &bg_color,
734 | &fg_color, disabled);
735 | if(user_data == &color_filter_list) {
736 | GSList **cfl = (GSList **)user_data;
737 |
738 | /* internal call */
739 | colorf->c_colorfilter = temp_dfilter;
740 | *cfl = g_slist_append(*cfl, colorf);
741 | } else {
742 | /* external call */
743 | /* just editing, don't need the compiled filter */
744 | dfilter_free(temp_dfilter);
745 | add_cb(colorf, user_data);
746 | }
747 | } /* if sscanf */
748 |
749 | skip_end_of_line = true1;
750 | }
751 |
752 | if (ferror(f))
753 | ret = errno(*__errno_location ());
754 |
755 | g_free(name);
756 | g_free(filter_exp);
757 | return ret;
758 | }
759 |
760 | /* read filters from the filter file */
761 | bool_Bool
762 | color_filters_read_globals(void *user_data, char** err_msg, color_filter_add_cb_func add_cb)
763 | {
764 | char *path;
765 | FILE *f;
766 | int ret;
767 |
768 | /*
769 | * Try to get the global filters.
770 | *
771 | * Get the path for the file that would have the global filters, and
772 | * try to open it.
773 | */
774 | path = get_datafile_path(COLORFILTERS_FILE_NAME"colorfilters");
775 | if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
776 | if (errno(*__errno_location ()) != ENOENT2) {
777 | /* Error trying to open the file; give up. */
778 | *err_msg = ws_strdup_printf("Could not open global filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())))
779 | g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())));
780 | g_free(path);
781 | return false0;
782 | }
783 |
784 | /*
785 | * There is no global filter file; treat that as equivalent to
786 | * that file existing bug being empty, and say we succeeded.
787 | */
788 | g_free(path);
789 | return true1;
790 | }
791 |
792 | ret = read_filters_file(path, f, user_data, add_cb);
793 | if (ret != 0) {
794 | *err_msg = ws_strdup_printf("Error reading global filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())))
795 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())));
796 | fclose(f);
797 | g_free(path);
798 | return false0;
799 | }
800 |
801 | fclose(f);
802 | g_free(path);
803 | return true1;
804 | }
805 |
806 | /* read filters from some other filter file (import) */
807 | bool_Bool
808 | color_filters_import(const char *path, void *user_data, char **err_msg, color_filter_add_cb_func add_cb)
809 | {
810 | FILE *f;
811 | int ret;
812 |
813 | if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
1 | Taking false branch | →
814 | *err_msg = ws_strdup_printf("Could not open filter file\n%s\nfor reading: %s.",wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s." , path, g_strerror((*__errno_location ())))
815 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s." , path, g_strerror((*__errno_location ())));
816 | return false0;
817 | }
818 |
819 | ret = read_filters_file(path, f, user_data, add_cb);
2 | ← | Calling 'read_filters_file' | →
820 | if (ret != 0) {
821 | *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())))
822 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s." , path, g_strerror((*__errno_location ())));
823 | fclose(f);
824 | return false0;
825 | }
826 |
827 | fclose(f);
828 | return true1;
829 | }
830 |
831 | struct write_filter_data
832 | {
833 | FILE *f;
834 | bool_Bool only_selected;
835 | };
836 |
837 | /* save a single filter */
838 | static void
839 | write_filter(void *filter_arg, void *data_arg)
840 | {
841 | struct write_filter_data *data = (struct write_filter_data *)data_arg;
842 | color_filter_t *colorf = (color_filter_t *)filter_arg;
843 | FILE *f = data->f;
844 |
845 | if ( (!data->only_selected) &&
846 | (strstr(colorf->filter_name,CONVERSATION_COLOR_PREFIX"___conversation_color_filter___")==NULL((void*)0)) ) {
847 | fprintf(f,"%s@%s@%s@[%u,%u,%u][%u,%u,%u]\n",
848 | colorf->disabled ? "!" : "",
849 | colorf->filter_name,
850 | colorf->filter_text,
851 | colorf->bg_color.red,
852 | colorf->bg_color.green,
853 | colorf->bg_color.blue,
854 | colorf->fg_color.red,
855 | colorf->fg_color.green,
856 | colorf->fg_color.blue);
857 | }
858 | }
859 |
860 | /* save filters in a filter file */
861 | static bool_Bool
862 | write_filters_file(GSList *cfl, FILE *f, bool_Bool only_selected)
863 | {
864 | struct write_filter_data data;
865 |
866 | data.f = f;
867 | data.only_selected = only_selected;
868 |
869 | fprintf(f,"# This file was created by %s. Edit with care.\n", application_flavor_name_proper());
870 | g_slist_foreach(cfl, write_filter, &data);
871 | return true1;
872 | }
873 |
874 | /* save filters in users filter file */
875 | bool_Bool
876 | color_filters_write(GSList *cfl, char** err_msg)
877 | {
878 | char *pf_dir_path;
879 | char *path;
880 | FILE *f;
881 |
882 | /* Create the directory that holds personal configuration files,
883 | if necessary. */
884 | if (create_persconffile_dir(&pf_dir_path) == -1) {
885 | *err_msg = ws_strdup_printf("Can't create directory\n\"%s\"\nfor color files: %s.",wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s." , pf_dir_path, g_strerror((*__errno_location ())))
886 | pf_dir_path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s." , pf_dir_path, g_strerror((*__errno_location ())));
887 | g_free(pf_dir_path);
888 | return false0;
889 | }
890 |
891 | path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1);
892 | if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
893 | *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s." , path, g_strerror((*__errno_location ())))
894 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s." , path, g_strerror((*__errno_location ())));
895 | g_free(path);
896 | return false0;
897 | }
898 | g_free(path);
899 | write_filters_file(cfl, f, false0);
900 | fclose(f);
901 | return true1;
902 | }
903 |
904 | /* save filters in some other filter file (export) */
905 | bool_Bool
906 | color_filters_export(const char *path, GSList *cfl, bool_Bool only_marked, char** err_msg)
907 | {
908 | FILE *f;
909 |
910 | if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
911 | *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s." , path, g_strerror((*__errno_location ())))
912 | path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s." , path, g_strerror((*__errno_location ())));
913 | return false0;
914 | }
915 | write_filters_file(cfl, f, only_marked);
916 | fclose(f);
917 | return true1;
918 | }
919 |
920 | /*
921 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
922 | *
923 | * Local variables:
924 | * c-basic-offset: 4
925 | * tab-width: 8
926 | * indent-tabs-mode: nil
927 | * End:
928 | *
929 | * vi: set shiftwidth=4 tabstop=8 expandtab:
930 | * :indentSize=4:tabSize=8:noTabs=true:
931 | */