### Bug Summary

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