### Bug Summary

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