Bug Summary

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

Annotated Source Code

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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-20/lib/clang/20 -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-20/lib/clang/20/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-truncation -Wno-format-nonliteral -Wno-pointer-sign -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/2025-09-12-100405-3933-1 -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/application_flavor.h>
25#include <wsutil/filesystem.h>
26#include <wsutil/file_util.h>
27#include <wsutil/report_message.h>
28#include <wsutil/wslog.h>
29#include <wsutil/ws_assert.h>
30
31#include <epan/packet.h>
32#include "color_filters.h"
33#include "file.h"
34#include <epan/dfilter/dfilter.h>
35#include <epan/prefs.h>
36#include <epan/epan_dissect.h>
37
38/*
39 * Each line in the colorfilters file has the following format:
40 *
41 * @<filter name>@<filter string>@[<background>][<foreground>]
42 * Background and foreground colors are 16-bit comma-separated RGB
43 * triplets. Colors are 16 bits because that's what GdkColor used.
44 * We might want to use a more standard, copy+paste-able color scheme
45 * such as #RRGGBB instead.
46 */
47
48#define RED_COMPONENT(x)(uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255))
49#define GREEN_COMPONENT(x)(uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255))
50#define BLUE_COMPONENT(x)(uint16_t) ( (((x) & 0xff) * 65535 / 255)) (uint16_t) ( (((x) & 0xff) * 65535 / 255))
51
52static int read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb);
53
54/* the currently active filters */
55static GSList *color_filter_list;
56
57/* keep "old" deleted filters in this list until
58 * the dissection no longer needs them (e.g. file is closed) */
59static GSList *color_filter_deleted_list;
60static GSList *color_filter_valid_list;
61
62/* Color Filters can en-/disabled. */
63static bool_Bool filters_enabled = true1;
64
65/* Remember if there are temporary coloring filters set to
66 * add sensitivity to the "Reset Coloring 1-10" menu item
67 */
68static bool_Bool tmp_colors_set;
69
70/* Create a new filter */
71color_filter_t *
72color_filter_new(const char *name, /* The name of the filter to create */
73 const char *filter_string, /* The string representing the filter */
74 color_t *bg_color, /* The background color */
75 color_t *fg_color, /* The foreground color */
76 bool_Bool disabled) /* Is the filter disabled? */
77{
78 color_filter_t *colorf;
79
80 colorf = g_new0(color_filter_t, 1)((color_filter_t *) g_malloc0_n ((1), sizeof (color_filter_t)
));
81 colorf->filter_name = g_strdup(name)g_strdup_inline (name);
82 colorf->filter_text = g_strdup(filter_string)g_strdup_inline (filter_string);
83 colorf->bg_color = *bg_color;
84 colorf->fg_color = *fg_color;
85 colorf->disabled = disabled;
86 return colorf;
87}
88
89/* Add ten empty (temporary) colorfilters for easy coloring */
90static void
91color_filters_add_tmp(GSList **cfl)
92{
93 char *name = NULL((void*)0);
94 uint32_t i;
95 char** bg_colors;
96 char** fg_colors;
97 unsigned long cval;
98 color_t bg_color, fg_color;
99 color_filter_t *colorf;
100
101 ws_assert(strlen(prefs.gui_colorized_fg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_fg)==69)
) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 101, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_fg)==69"
); } while (0);
102 ws_assert(strlen(prefs.gui_colorized_bg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_bg)==69)
) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 102, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_bg)==69"
); } while (0);
103 fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
104 bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);
105
106 for ( i=1 ; i<=10 ; i++ ) {
107 name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___"
,i);
108
109 /* retrieve background and foreground colors */
110 cval = strtoul(fg_colors[i-1], NULL((void*)0), 16);
111 fg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255)
);
112 fg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
113 fg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
114 cval = strtoul(bg_colors[i-1], NULL((void*)0), 16);
115 bg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255)
);
116 bg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
117 bg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
118 colorf = color_filter_new(name, NULL((void*)0), &bg_color, &fg_color, true1);
119 colorf->filter_text = g_strdup("frame")g_strdup_inline ("frame");
120 *cfl = g_slist_append(*cfl, colorf);
121
122 g_free(name);
123 }
124
125 g_strfreev(fg_colors);
126 g_strfreev(bg_colors);
127}
128
129static int
130color_filters_find_by_name_cb(const void *arg1, const void *arg2)
131{
132 const color_filter_t *colorf = (const color_filter_t *)arg1;
133 const char *name = (const char *)arg2;
134
135 return strcmp(colorf->filter_name, name);
136}
137
138/* Get the filter of a temporary color filter */
139char*
140color_filters_get_tmp(uint8_t filt_nr)
141{
142 char* name = NULL((void*)0);
143 char* filter = NULL((void*)0);
144 GSList* cfl;
145 color_filter_t* colorf;
146 /* Only perform a lookup if the supplied filter number is in the expected range */
147 if (filt_nr < 1 || filt_nr > 10)
148 return NULL((void*)0);
149
150 name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filt_nr)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___"
, filt_nr);
151 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
152 colorf = (color_filter_t*)cfl->data;
153
154 if (!colorf->disabled)
155 filter = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
156
157 g_free(name);
158
159 return filter;
160}
161
162/* Set the filter off a temporary colorfilters and enable it */
163bool_Bool
164color_filters_set_tmp(uint8_t filt_nr, const char *filter, bool_Bool disabled, char **err_msg)
165{
166 char *name = NULL((void*)0);
167 const char *tmpfilter = NULL((void*)0);
168 GSList *cfl;
169 color_filter_t *colorf;
170 dfilter_t *compiled_filter;
171 uint8_t i;
172 df_error_t *df_err = NULL((void*)0);
173 /* Go through the temporary filters and look for the same filter string.
174 * If found, clear it so that a filter can be "moved" up and down the list
175 */
176 for ( i=1 ; i<=10 ; i++ ) {
177 /* If we need to reset the temporary filter (filter==NULL), don't look
178 * for other rules with the same filter string
179 */
180 if( i!=filt_nr && filter==NULL((void*)0) )
181 continue;
182
183 name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___"
,i);
184 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
185 colorf = (color_filter_t *)cfl->data;
186
187 /* Only change the filter rule if this is the rule to change or if
188 * a matching filter string has been found
189 */
190 if(colorf && ( i == filt_nr || filter == NULL((void*)0) || !strcmp(filter, colorf->filter_text) ) ) {
191 /* set filter string to "frame" if we are resetting the rules
192 * or if we found a matching filter string which need to be cleared
193 */
194 tmpfilter = ( (filter==NULL((void*)0)) || (i!=filt_nr) ) ? "frame" : filter;
195 if (!dfilter_compile(tmpfilter, &compiled_filter, &df_err)dfilter_compile_full(tmpfilter, &compiled_filter, &df_err
, (1U << 1)|(1U << 2), __func__)) {
196 *err_msg = ws_strdup_printf( "Could not compile color filter name: \"%s\" text: \"%s\".\n%s", name, filter, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, name, filter, df_err->msg);
197 df_error_free(&df_err);
198 g_free(name);
199 return false0;
200 } else {
201 g_free(colorf->filter_text);
202 dfilter_free(colorf->c_colorfilter);
203 colorf->filter_text = g_strdup(tmpfilter)g_strdup_inline (tmpfilter);
204 colorf->c_colorfilter = compiled_filter;
205 colorf->disabled = ((i!=filt_nr) ? true1 : disabled);
206 /* Remember that there are now temporary coloring filters set */
207 if( filter )
208 tmp_colors_set = true1;
209 }
210 }
211 g_free(name);
212 }
213 return true1;
214}
215
216const color_filter_t *
217color_filters_tmp_color(uint8_t filter_num) {
218 char *name;
219 color_filter_t *colorf = NULL((void*)0);
220 GSList *cfl;
221
222 name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filter_num)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___"
, filter_num);
223 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
224 if (cfl) {
225 colorf = (color_filter_t *)cfl->data;
226 }
227 g_free(name);
228
229 return colorf;
230}
231
232/* Reset the temporary colorfilters */
233bool_Bool
234color_filters_reset_tmp(char **err_msg)
235{
236 uint8_t i;
237
238 for ( i=1 ; i<=10 ; i++ ) {
239 if (!color_filters_set_tmp(i, NULL((void*)0), true1, err_msg))
240 return false0;
241 }
242 /* Remember that there are now *no* temporary coloring filters set */
243 tmp_colors_set = false0;
244 return true1;
245}
246
247/* delete the specified filter */
248void
249color_filter_delete(color_filter_t *colorf)
250{
251 g_free(colorf->filter_name);
252 g_free(colorf->filter_text);
253 dfilter_free(colorf->c_colorfilter);
254 g_free(colorf);
255}
256
257/* delete the specified filter (called from g_slist_foreach) */
258static void
259color_filter_delete_cb(void *filter_arg)
260{
261 color_filter_t *colorf = (color_filter_t *)filter_arg;
262
263 color_filter_delete(colorf);
264}
265
266/* delete the specified list */
267void
268color_filter_list_delete(GSList **cfl)
269{
270 g_slist_free_full(*cfl, color_filter_delete_cb);
271 *cfl = NULL((void*)0);
272}
273
274/* clone a single list entries from normal to edit list */
275static color_filter_t *
276color_filter_clone(color_filter_t *colorf)
277{
278 color_filter_t *new_colorf;
279
280 new_colorf = g_new(color_filter_t, 1)((color_filter_t *) g_malloc_n ((1), sizeof (color_filter_t))
);
281 new_colorf->filter_name = g_strdup(colorf->filter_name)g_strdup_inline (colorf->filter_name);
282 new_colorf->filter_text = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
283 new_colorf->bg_color = colorf->bg_color;
284 new_colorf->fg_color = colorf->fg_color;
285 new_colorf->disabled = colorf->disabled;
286 new_colorf->c_colorfilter = NULL((void*)0);
287
288 return new_colorf;
289}
290
291static void
292color_filter_list_clone_cb(void *filter_arg, void *cfl_arg)
293{
294 GSList **cfl = (GSList **)cfl_arg;
295 color_filter_t *new_colorf;
296
297 new_colorf = color_filter_clone((color_filter_t *)filter_arg);
298 *cfl = g_slist_append(*cfl, new_colorf);
299}
300
301/* clone the specified list */
302static GSList *
303color_filter_list_clone(GSList *cfl)
304{
305 GSList *new_list = NULL((void*)0);
306
307 g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);
308
309 return new_list;
310}
311
312static bool_Bool
313color_filters_get(char** err_msg, color_filter_add_cb_func add_cb)
314{
315 char *path;
316 FILE *f;
317 int ret;
318
319 /* start the list with the temporary colorizing rules */
320 color_filters_add_tmp(&color_filter_list);
321
322 /*
323 * Try to get the user's filters.
324 *
325 * Get the path for the file that would have their filters, and
326 * try to open it.
327 */
328 path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1);
329 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
330 if (errno(*__errno_location ()) != ENOENT2) {
331 /* Error trying to open the file; give up. */
332 *err_msg = ws_strdup_printf("Could not open filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
333 g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
334 g_free(path);
335 return false0;
336 }
337 /* They don't have any filters; try to read the global filters */
338 g_free(path);
339 return color_filters_read_globals(&color_filter_list, err_msg, add_cb);
340 }
341
342 /*
343 * We've opened it; try to read it.
344 */
345 ret = read_filters_file(path, f, &color_filter_list, add_cb);
346 if (ret != 0) {
347 *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
348 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
349 fclose(f);
350 g_free(path);
351 return false0;
352 }
353
354 /* Success. */
355 fclose(f);
356 g_free(path);
357 return true1;
358}
359
360/* Initialize the filter structures (reading from file) for general running, including app startup */
361bool_Bool
362color_filters_init(char** err_msg, color_filter_add_cb_func add_cb)
363{
364 /* delete all currently existing filters */
365 color_filter_list_delete(&color_filter_list);
366
367 /* now try to construct the filters list */
368 return color_filters_get(err_msg, add_cb);
369}
370
371bool_Bool
372color_filters_reload(char** err_msg, color_filter_add_cb_func add_cb)
373{
374 /* "move" old entries to the deleted list
375 * we must keep them until the dissection no longer needs them */
376 color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
377 color_filter_list = NULL((void*)0);
378
379 /* now try to construct the filters list */
380 return color_filters_get(err_msg, add_cb);
381}
382
383void
384color_filters_cleanup(void)
385{
386 /* delete the previously deleted filters */
387 color_filter_list_delete(&color_filter_deleted_list);
388}
389
390typedef struct _color_clone
391{
392 void *user_data;
393 color_filter_add_cb_func add_cb;
394} color_clone_t;
395
396static void
397color_filters_clone_cb(void *filter_arg, void *user_data)
398{
399 color_clone_t* clone_data = (color_clone_t*)user_data;
400 color_filter_t * new_colorf = color_filter_clone((color_filter_t *)filter_arg);
401
402 clone_data->add_cb (new_colorf, clone_data->user_data);
403}
404
405void
406color_filters_clone(void *user_data, color_filter_add_cb_func add_cb)
407{
408 color_clone_t clone_data;
409
410 clone_data.user_data = user_data;
411 clone_data.add_cb = add_cb;
412 g_slist_foreach(color_filter_list, color_filters_clone_cb, &clone_data);
413}
414
415
416static void
417color_filter_compile_cb(void *filter_arg, void *err)
418{
419 color_filter_t *colorf = (color_filter_t *)filter_arg;
420 char **err_msg = (char**)err;
421 df_error_t *df_err = NULL((void*)0);
422
423 ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void*
)0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 423, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)"
); } while (0);
424
425 /* If the filter is disabled it doesn't matter if it compiles or not. */
426 if (colorf->disabled) return;
427
428 if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf->
c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__
)) {
429 *err_msg = ws_strdup_printf("Could not compile color filter name: \"%s\" text: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg)
430 colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg);
431 df_error_free(&df_err);
432 /* this filter was compilable before, so this should never happen */
433 /* except if the OK button of the parent window has been clicked */
434 /* so don't use ws_assert_not_reached() but check the filters again */
435 }
436}
437
438static void
439color_filter_validate_cb(void *filter_arg, void *err)
440{
441 color_filter_t *colorf = (color_filter_t *)filter_arg;
442 char **err_msg = (char**)err;
443 df_error_t *df_err = NULL((void*)0);
444
445 ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void*
)0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 445, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)"
); } while (0);
446
447 /* If the filter is disabled it doesn't matter if it compiles or not. */
448 if (colorf->disabled) return;
449
450 if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf->
c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__
)) {
451 *err_msg = ws_strdup_printf("Disabling color filter name: \"%s\" filter: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg)
452 colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg);
453 df_error_free(&df_err);
454
455 /* Disable the color filter in the list of color filters. */
456 colorf->disabled = true1;
457 }
458
459 /* XXX: What if the color filter tests "frame.coloring_rule.name" or
460 * "frame.coloring_rule.string"?
461 */
462}
463
464/* apply changes from the edit list */
465bool_Bool
466color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl, char** err_msg)
467{
468 bool_Bool ret = true1;
469
470 *err_msg = NULL((void*)0);
471
472 /* "move" old entries to the deleted list
473 * we must keep them until the dissection no longer needs them */
474 color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
475 color_filter_list = NULL((void*)0);
476
477 /* clone all list entries from tmp/edit to normal list */
478 color_filter_list_delete(&color_filter_valid_list);
479 color_filter_valid_list = color_filter_list_clone(tmp_cfl);
480 color_filter_valid_list = g_slist_concat(color_filter_valid_list,
481 color_filter_list_clone(edit_cfl) );
482
483 /* compile all filter */
484 g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, err_msg);
485 if (*err_msg != NULL((void*)0)) {
486 ret = false0;
487 }
488
489 /* clone all list entries from tmp/edit to normal list */
490 color_filter_list = color_filter_list_clone(color_filter_valid_list);
491
492 /* compile all filter */
493 g_slist_foreach(color_filter_list, color_filter_compile_cb, err_msg);
494 if (*err_msg != NULL((void*)0)) {
495 ret = false0;
496 }
497
498 return ret;
499}
500
501bool_Bool
502color_filters_used(void)
503{
504 return color_filter_list != NULL((void*)0) && filters_enabled;
505}
506
507bool_Bool
508tmp_color_filters_used(void)
509{
510 return tmp_colors_set;
511}
512
513/* prepare the epan_dissect_t for the filter */
514static void
515prime_edt(void *data, void *user_data)
516{
517 color_filter_t *colorf = (color_filter_t *)data;
518 epan_dissect_t *edt = (epan_dissect_t *)user_data;
519
520 if (colorf->c_colorfilter != NULL((void*)0))
521 epan_dissect_prime_with_dfilter(edt, colorf->c_colorfilter);
522}
523
524/* Prime the epan_dissect_t with all the compiler
525 * color filters in 'color_filter_list'. */
526void
527color_filters_prime_edt(epan_dissect_t *edt)
528{
529 if (color_filters_used())
530 g_slist_foreach(color_filter_list, prime_edt, edt);
531}
532
533static int
534find_hfid(const void *data, const void *user_data)
535{
536 color_filter_t *colorf = (color_filter_t *)data;
537 int hfid = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
538
539 if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
540 if (dfilter_interested_in_field(colorf->c_colorfilter, hfid)) {
541 return 0;
542 }
543 }
544 return -1;
545}
546
547bool_Bool
548color_filters_use_hfid(int hfid)
549{
550 GSList *item = NULL((void*)0);
551 if (color_filters_used())
552 item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(hfid)((gpointer) (glong) (hfid)), find_hfid);
553 return (item != NULL((void*)0));
554}
555
556static int
557find_proto(const void *data, const void *user_data)
558{
559 color_filter_t *colorf = (color_filter_t *)data;
560 int proto_id = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
561
562 if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
563 if (dfilter_interested_in_proto(colorf->c_colorfilter, proto_id)) {
564 return 0;
565 }
566 }
567 return -1;
568}
569
570bool_Bool
571color_filters_use_proto(int proto_id)
572{
573 GSList *item = NULL((void*)0);
574 if (color_filters_used())
575 item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(proto_id)((gpointer) (glong) (proto_id)), find_proto);
576 return (item != NULL((void*)0));
577}
578
579/* * Return the color_t for later use */
580const color_filter_t *
581color_filters_colorize_packet(epan_dissect_t *edt)
582{
583 GSList *curr;
584 color_filter_t *colorf;
585
586 /* If we have color filters, "search" for the matching one. */
587 if ((edt->tree != NULL((void*)0)) && (color_filters_used())) {
588 curr = color_filter_list;
589
590 while(curr != NULL((void*)0)) {
591 colorf = (color_filter_t *)curr->data;
592 if ( (!colorf->disabled) &&
593 (colorf->c_colorfilter != NULL((void*)0)) &&
594 dfilter_apply_edt(colorf->c_colorfilter, edt)) {
595 return colorf;
596 }
597 curr = g_slist_next(curr)((curr) ? (((GSList *)(curr))->next) : ((void*)0));
598 }
599 }
600
601 return NULL((void*)0);
602}
603
604/* read filters from the given file */
605/* XXX - Would it make more sense to use GStrings here instead of reallocing
606 our buffers? */
607static int
608read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb)
609{
610#define INIT_BUF_SIZE128 128
611 char *name;
612 char *filter_exp;
613 uint32_t name_len = INIT_BUF_SIZE128;
614 uint32_t filter_exp_len = INIT_BUF_SIZE128;
615 uint32_t i = 0;
616 int c;
617 uint16_t fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
618 bool_Bool disabled = false0;
619 bool_Bool skip_end_of_line = false0;
620 int ret = 0;
621
622 name = (char *)g_malloc(name_len + 1);
623 filter_exp = (char *)g_malloc(filter_exp_len + 1);
624
625 while (1) {
3
←
Loop condition is true. Entering loop body
→
37
←
Loop condition is true. Entering loop body
→
626
627 if (skip_end_of_line
3.1
'skip_end_of_line' is false
37.1
'skip_end_of_line' is true
) {
38
←
Taking true branch
→
628 do {
41
←
Loop condition is false. Exiting loop
→
629 c = ws_getc_unlockedgetc_unlocked(f);
630 } while (c != EOF(-1) && c != '\n');
39
←
Assuming the condition is true
→
40
←
Assuming the condition is false
→
631 if (c == EOF(-1))
42
←
Taking false branch
→
632 break;
633 disabled = false0;
634 skip_end_of_line = false0;
635 }
636
637 while ((c = ws_getc_unlockedgetc_unlocked(f)) != EOF(-1) && g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)) {
4
←
Assuming the condition is true
→
5
←
Loop condition is false. Execution continues on line 643
→
43
←
Assuming the condition is true
→
44
←
Loop condition is false. Execution continues on line 643
→
638 if (c == '\n') {
639 continue;
640 }
641 }
642
643 if (c == EOF(-1))
6
←
Taking false branch
→
45
←
Taking false branch
→
644 break;
645
646 if (c == '!') {
7
←
Assuming the condition is false
→
8
←
Taking false branch
→
46
←
Assuming the condition is false
→
47
←
Taking false branch
→
647 disabled = true1;
648 continue;
649 }
650
651 /* skip # comments and invalid lines */
652 if (c != '@') {
9
←
Assuming the condition is false
→
10
←
Taking false branch
→
48
←
Assuming the condition is false
→
49
←
Taking false branch
→
653 skip_end_of_line = true1;
654 continue;
655 }
656
657 /* we get the @ delimiter.
658 * Format is:
659 * @name@filter expression@[background r,g,b][foreground r,g,b]
660 */
661
662 /* retrieve name */
663 i = 0;
664 while (1) {
11
←
Loop condition is true. Entering loop body
→
16
←
Loop condition is true. Entering loop body
→
50
←
Loop condition is true. Entering loop body
→
55
←
Loop condition is true. Entering loop body
→
665 c = ws_getc_unlockedgetc_unlocked(f);
666 if (c == EOF(-1) || c == '@')
12
←
Assuming the condition is false
→
13
←
Assuming the condition is false
→
14
←
Taking false branch
→
17
←
Assuming the condition is false
→
18
←
Assuming the condition is true
→
19
←
Taking true branch
→
51
←
Assuming the condition is false
→
52
←
Assuming the condition is false
→
53
←
Taking false branch
→
56
←
Assuming the condition is false
→
57
←
Assuming the condition is true
→
58
←
Taking true branch
→
667 break;
20
←
 Execution continues on line 675
→
59
←
 Execution continues on line 675
→
668 if (i
14.1
'i' is < 'name_len'
53.1
'i' is < 'name_len'
 >= name_len) {
15
←
Taking false branch
→
54
←
Taking false branch
→
669 /* buffer isn't long enough; double its length.*/
670 name_len *= 2;
671 name = (char *)g_realloc(name, name_len + 1);
672 }
673 name[i++] = c;
674 }
675 name[i] = '\0';
676
677 if (c == EOF(-1)) {
21
←
Taking false branch
→
60
←
Taking false branch
→
678 break;
679 } else if (i
21.1
'i' is not equal to 0
60.1
'i' is not equal to 0
 == 0) {
22
←
Taking false branch
→
61
←
Taking false branch
→
680 skip_end_of_line = true1;
681 continue;
682 }
683
684 /* retrieve filter expression */
685 i = 0;
686 while (1) {
23
←
Loop condition is true. Entering loop body
→
28
←
Loop condition is true. Entering loop body
→
62
←
Loop condition is true. Entering loop body
→
67
←
Loop condition is true. Entering loop body
→
687 c = ws_getc_unlockedgetc_unlocked(f);
688 if (c == EOF(-1) || c == '@')
24
←
Assuming the condition is false
→
25
←
Assuming the condition is false
→
26
←
Taking false branch
→
29
←
Assuming the condition is false
→
30
←
Assuming the condition is true
→
31
←
Taking true branch
→
63
←
Assuming the condition is false
→
64
←
Assuming the condition is false
→
65
←
Taking false branch
→
68
←
Assuming the condition is false
→
69
←
Assuming the condition is true
→
70
←
Taking true branch
→
689 break;
32
←
 Execution continues on line 697
→
71
←
 Execution continues on line 697
→
690 if (i
26.1
'i' is < 'filter_exp_len'
65.1
'i' is < 'filter_exp_len'
 >= filter_exp_len) {
27
←
Taking false branch
→
66
←
Taking false branch
→
691 /* buffer isn't long enough; double its length.*/
692 filter_exp_len *= 2;
693 filter_exp = (char *)g_realloc(filter_exp, filter_exp_len + 1);
694 }
695 filter_exp[i++] = c;
696 }
697 filter_exp[i] = '\0';
698
699 if (c == EOF(-1)) {
33
←
Taking false branch
→
72
←
Taking false branch
→
700 break;
701 } else if (i
33.1
'i' is not equal to 0
72.1
'i' is not equal to 0
 == 0) {
34
←
Taking false branch
→
73
←
Taking false branch
→
702 skip_end_of_line = true1;
703 continue;
704 }
705
706 /* retrieve background and foreground colors */
707 if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
35
←
Assuming this stream operation fails
→
36
←
Taking false branch
→
74
←
File position of the stream might be 'indeterminate' after a failed operation. Can cause undefined behavior
708 &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
709
710 /* we got a complete color filter */
711
712 color_t bg_color, fg_color;
713 color_filter_t *colorf;
714 dfilter_t *temp_dfilter = NULL((void*)0);
715 df_error_t *df_err = NULL((void*)0);
716
717 if (!disabled && !dfilter_compile(filter_exp, &temp_dfilter, &df_err)dfilter_compile_full(filter_exp, &temp_dfilter, &df_err
, (1U << 1)|(1U << 2), __func__)) {
718 report_warning("Disabling color filter: Could not compile \"%s\" in colorfilters file \"%s\".\n%s", name, path, df_err->msg);
719 df_error_free(&df_err);
720
721 /* skip_end_of_line = true; */
722 disabled = true1;
723 }
724
725 fg_color.red = fg_r;
726 fg_color.green = fg_g;
727 fg_color.blue = fg_b;
728
729 bg_color.red = bg_r;
730 bg_color.green = bg_g;
731 bg_color.blue = bg_b;
732
733 colorf = color_filter_new(name, filter_exp, &bg_color,
734 &fg_color, disabled);
735 if(user_data == &color_filter_list) {
736 GSList **cfl = (GSList **)user_data;
737
738 /* internal call */
739 colorf->c_colorfilter = temp_dfilter;
740 *cfl = g_slist_append(*cfl, colorf);
741 } else {
742 /* external call */
743 /* just editing, don't need the compiled filter */
744 dfilter_free(temp_dfilter);
745 add_cb(colorf, user_data);
746 }
747 } /* if sscanf */
748
749 skip_end_of_line = true1;
750 }
751
752 if (ferror(f))
753 ret = errno(*__errno_location ());
754
755 g_free(name);
756 g_free(filter_exp);
757 return ret;
758}
759
760/* read filters from the filter file */
761bool_Bool
762color_filters_read_globals(void *user_data, char** err_msg, color_filter_add_cb_func add_cb)
763{
764 char *path;
765 FILE *f;
766 int ret;
767
768 /*
769 * Try to get the global filters.
770 *
771 * Get the path for the file that would have the global filters, and
772 * try to open it.
773 */
774 path = get_datafile_path(COLORFILTERS_FILE_NAME"colorfilters");
775 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
776 if (errno(*__errno_location ()) != ENOENT2) {
777 /* Error trying to open the file; give up. */
778 *err_msg = ws_strdup_printf("Could not open global filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
779 g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
780 g_free(path);
781 return false0;
782 }
783
784 /*
785 * There is no global filter file; treat that as equivalent to
786 * that file existing bug being empty, and say we succeeded.
787 */
788 g_free(path);
789 return true1;
790 }
791
792 ret = read_filters_file(path, f, user_data, add_cb);
793 if (ret != 0) {
794 *err_msg = ws_strdup_printf("Error reading global filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
795 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
796 fclose(f);
797 g_free(path);
798 return false0;
799 }
800
801 fclose(f);
802 g_free(path);
803 return true1;
804}
805
806/* read filters from some other filter file (import) */
807bool_Bool
808color_filters_import(const char *path, void *user_data, char **err_msg, color_filter_add_cb_func add_cb)
809{
810 FILE *f;
811 int ret;
812
813 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
1
Taking false branch
→
814 *err_msg = ws_strdup_printf("Could not open filter file\n%s\nfor reading: %s.",wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s."
, path, g_strerror((*__errno_location ())))
815 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s."
, path, g_strerror((*__errno_location ())));
816 return false0;
817 }
818
819 ret = read_filters_file(path, f, user_data, add_cb);
2
←
Calling 'read_filters_file'
→
820 if (ret != 0) {
821 *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
822 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
823 fclose(f);
824 return false0;
825 }
826
827 fclose(f);
828 return true1;
829}
830
831struct write_filter_data
832{
833 FILE *f;
834 bool_Bool only_selected;
835};
836
837/* save a single filter */
838static void
839write_filter(void *filter_arg, void *data_arg)
840{
841 struct write_filter_data *data = (struct write_filter_data *)data_arg;
842 color_filter_t *colorf = (color_filter_t *)filter_arg;
843 FILE *f = data->f;
844
845 if ( (!data->only_selected) &&
846 (strstr(colorf->filter_name,CONVERSATION_COLOR_PREFIX"___conversation_color_filter___")==NULL((void*)0)) ) {
847 fprintf(f,"%s@%s@%s@[%u,%u,%u][%u,%u,%u]\n",
848 colorf->disabled ? "!" : "",
849 colorf->filter_name,
850 colorf->filter_text,
851 colorf->bg_color.red,
852 colorf->bg_color.green,
853 colorf->bg_color.blue,
854 colorf->fg_color.red,
855 colorf->fg_color.green,
856 colorf->fg_color.blue);
857 }
858}
859
860/* save filters in a filter file */
861static bool_Bool
862write_filters_file(GSList *cfl, FILE *f, bool_Bool only_selected)
863{
864 struct write_filter_data data;
865
866 data.f = f;
867 data.only_selected = only_selected;
868
869 fprintf(f,"# This file was created by %s. Edit with care.\n", application_flavor_name_proper());
870 g_slist_foreach(cfl, write_filter, &data);
871 return true1;
872}
873
874/* save filters in users filter file */
875bool_Bool
876color_filters_write(GSList *cfl, char** err_msg)
877{
878 char *pf_dir_path;
879 char *path;
880 FILE *f;
881
882 /* Create the directory that holds personal configuration files,
883 if necessary. */
884 if (create_persconffile_dir(&pf_dir_path) == -1) {
885 *err_msg = ws_strdup_printf("Can't create directory\n\"%s\"\nfor color files: %s.",wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s."
, pf_dir_path, g_strerror((*__errno_location ())))
886 pf_dir_path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s."
, pf_dir_path, g_strerror((*__errno_location ())));
887 g_free(pf_dir_path);
888 return false0;
889 }
890
891 path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1);
892 if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
893 *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())))
894 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())));
895 g_free(path);
896 return false0;
897 }
898 g_free(path);
899 write_filters_file(cfl, f, false0);
900 fclose(f);
901 return true1;
902}
903
904/* save filters in some other filter file (export) */
905bool_Bool
906color_filters_export(const char *path, GSList *cfl, bool_Bool only_marked, char** err_msg)
907{
908 FILE *f;
909
910 if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
911 *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())))
912 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())));
913 return false0;
914 }
915 write_filters_file(cfl, f, only_marked);
916 fclose(f);
917 return true1;
918}
919
920/*
921 * Editor modelines - https://www.wireshark.org/tools/modelines.html
922 *
923 * Local variables:
924 * c-basic-offset: 4
925 * tab-width: 8
926 * indent-tabs-mode: nil
927 * End:
928 *
929 * vi: set shiftwidth=4 tabstop=8 expandtab:
930 * :indentSize=4:tabSize=8:noTabs=true:
931 */