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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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name color_filters.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan -isystem /builds/wireshark/wireshark/build/epan -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /usr/include/lua5.4 -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -D epan_EXPORTS -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -I /builds/wireshark/wireshark/wiretap -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2026-01-28-100410-3623-1 -x c /builds/wireshark/wireshark/epan/color_filters.c
1/* color_filters.c
2 * Routines for color filters
3 *
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <[email protected]>
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
47static 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 */
50static 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) */
54static GSList *color_filter_deleted_list;
55static GSList *color_filter_valid_list;
56
57/* Color Filters can en-/disabled. */
58static 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 */
63static bool_Bool tmp_colors_set;
64
65/* Create a new filter */
66color_filter_t *
67color_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 */
85static void
86color_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
124static int
125color_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 */
134char*
135color_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 */
158bool_Bool
159color_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
211const color_filter_t *
212color_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 */
228bool_Bool
229color_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 */
243void
244color_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) */
253static void
254color_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 */
262void
263color_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 */
270static color_filter_t *
271color_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
286static void
287color_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 */
297static GSList *
298color_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
307static bool_Bool
308color_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 */
356bool_Bool
357color_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
366bool_Bool
367color_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
378void
379color_filters_cleanup(void)
380{
381 /* delete the previously deleted filters */
382 color_filter_list_delete(&color_filter_deleted_list);
383}
384
385typedef struct _color_clone
386{
387 void *user_data;
388 color_filter_add_cb_func add_cb;
389} color_clone_t;
390
391static void
392color_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
400void
401color_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
411static void
412color_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
433static void
434color_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 */
460bool_Bool
461color_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
496bool_Bool
497color_filters_used(void)
498{
499 return color_filter_list != NULL((void*)0) && filters_enabled;
500}
501
502bool_Bool
503tmp_color_filters_used(void)
504{
505 return tmp_colors_set;
506}
507
508/* prepare the epan_dissect_t for the filter */
509static void
510prime_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'. */
521void
522color_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
528static int
529find_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
542bool_Bool
543color_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
551static int
552find_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
565bool_Bool
566color_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 */
575const color_filter_t *
576color_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? */
602static int
603read_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 */
756bool_Bool
757color_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) */
802bool_Bool
803color_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
826struct write_filter_data
827{
828 FILE *f;
829 bool_Bool only_selected;
830};
831
832/* save a single filter */
833static void
834write_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 */
856static bool_Bool
857write_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 */
870bool_Bool
871color_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) */
900bool_Bool
901color_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 */