Bug Summary

File:epan/color_filters.c
Warning:line 706, column 13
Read function called when stream is in EOF state. Function has no effect

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-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/2025-11-07-100324-3624-1 -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 <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
7 *
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
10/*
11 * Updated 1 Dec 10 jjm
12 */
13
14#include <config.h>
15#define WS_LOG_DOMAIN"Epan" LOG_DOMAIN_EPAN"Epan"
16
17#include <glib.h>
18
19#include <errno(*__errno_location ()).h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23
24#include <wsutil/filesystem.h>
25#include <wsutil/file_util.h>
26#include <wsutil/report_message.h>
27#include <wsutil/wslog.h>
28#include <wsutil/ws_assert.h>
29
30#include <epan/packet.h>
31#include "color_filters.h"
32#include "file.h"
33#include <epan/dfilter/dfilter.h>
34#include <epan/prefs.h>
35#include <epan/epan_dissect.h>
36
37/*
38 * Each line in the colorfilters file has the following format:
39 *
40 * @<filter name>@<filter string>@[<background>][<foreground>]
41 * Background and foreground colors are 16-bit comma-separated RGB
42 * triplets. Colors are 16 bits because that's what GdkColor used.
43 * We might want to use a more standard, copy+paste-able color scheme
44 * such as #RRGGBB instead.
45 */
46
47#define RED_COMPONENT(x)(uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 16) & 0xff) * 65535 / 255))
48#define GREEN_COMPONENT(x)(uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255)) (uint16_t) (((((x) >> 8) & 0xff) * 65535 / 255))
49#define BLUE_COMPONENT(x)(uint16_t) ( (((x) & 0xff) * 65535 / 255)) (uint16_t) ( (((x) & 0xff) * 65535 / 255))
50
51static int read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb);
52
53/* the currently active filters */
54static GSList *color_filter_list;
55
56/* keep "old" deleted filters in this list until
57 * the dissection no longer needs them (e.g. file is closed) */
58static GSList *color_filter_deleted_list;
59static GSList *color_filter_valid_list;
60
61/* Color Filters can en-/disabled. */
62static bool_Bool filters_enabled = true1;
63
64/* Remember if there are temporary coloring filters set to
65 * add sensitivity to the "Reset Coloring 1-10" menu item
66 */
67static bool_Bool tmp_colors_set;
68
69/* Create a new filter */
70color_filter_t *
71color_filter_new(const char *name, /* The name of the filter to create */
72 const char *filter_string, /* The string representing the filter */
73 color_t *bg_color, /* The background color */
74 color_t *fg_color, /* The foreground color */
75 bool_Bool disabled) /* Is the filter disabled? */
76{
77 color_filter_t *colorf;
78
79 colorf = g_new0(color_filter_t, 1)((color_filter_t *) g_malloc0_n ((1), sizeof (color_filter_t)
));
80 colorf->filter_name = g_strdup(name)g_strdup_inline (name);
81 colorf->filter_text = g_strdup(filter_string)g_strdup_inline (filter_string);
82 colorf->bg_color = *bg_color;
83 colorf->fg_color = *fg_color;
84 colorf->disabled = disabled;
85 return colorf;
86}
87
88/* Add ten empty (temporary) colorfilters for easy coloring */
89static void
90color_filters_add_tmp(GSList **cfl)
91{
92 char *name = NULL((void*)0);
93 uint32_t i;
94 char** bg_colors;
95 char** fg_colors;
96 unsigned long cval;
97 color_t bg_color, fg_color;
98 color_filter_t *colorf;
99
100 ws_assert(strlen(prefs.gui_colorized_fg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_fg)==69)
) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 100, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_fg)==69"
); } while (0);
101 ws_assert(strlen(prefs.gui_colorized_bg)==69)do { if ((1) && !(strlen(prefs.gui_colorized_bg)==69)
) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 101, __func__, "assertion failed: %s", "strlen(prefs.gui_colorized_bg)==69"
); } while (0);
102 fg_colors = g_strsplit(prefs.gui_colorized_fg, ",", -1);
103 bg_colors = g_strsplit(prefs.gui_colorized_bg, ",", -1);
104
105 for ( i=1 ; i<=10 ; i++ ) {
106 name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___"
,i);
107
108 /* retrieve background and foreground colors */
109 cval = strtoul(fg_colors[i-1], NULL((void*)0), 16);
110 fg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255)
);
111 fg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
112 fg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
113 cval = strtoul(bg_colors[i-1], NULL((void*)0), 16);
114 bg_color.red = RED_COMPONENT(cval)(uint16_t) (((((cval) >> 16) & 0xff) * 65535 / 255)
);
115 bg_color.green = GREEN_COMPONENT(cval)(uint16_t) (((((cval) >> 8) & 0xff) * 65535 / 255));
116 bg_color.blue = BLUE_COMPONENT(cval)(uint16_t) ( (((cval) & 0xff) * 65535 / 255));
117 colorf = color_filter_new(name, NULL((void*)0), &bg_color, &fg_color, true1);
118 colorf->filter_text = g_strdup("frame")g_strdup_inline ("frame");
119 *cfl = g_slist_append(*cfl, colorf);
120
121 g_free(name);
122 }
123
124 g_strfreev(fg_colors);
125 g_strfreev(bg_colors);
126}
127
128static int
129color_filters_find_by_name_cb(const void *arg1, const void *arg2)
130{
131 const color_filter_t *colorf = (const color_filter_t *)arg1;
132 const char *name = (const char *)arg2;
133
134 return strcmp(colorf->filter_name, name);
135}
136
137/* Get the filter of a temporary color filter */
138char*
139color_filters_get_tmp(uint8_t filt_nr)
140{
141 char* name = NULL((void*)0);
142 char* filter = NULL((void*)0);
143 GSList* cfl;
144 color_filter_t* colorf;
145 /* Only perform a lookup if the supplied filter number is in the expected range */
146 if (filt_nr < 1 || filt_nr > 10)
147 return NULL((void*)0);
148
149 name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filt_nr)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___"
, filt_nr);
150 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
151 colorf = (color_filter_t*)cfl->data;
152
153 if (!colorf->disabled)
154 filter = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
155
156 g_free(name);
157
158 return filter;
159}
160
161/* Set the filter off a temporary colorfilters and enable it */
162bool_Bool
163color_filters_set_tmp(uint8_t filt_nr, const char *filter, bool_Bool disabled, char **err_msg)
164{
165 char *name = NULL((void*)0);
166 const char *tmpfilter = NULL((void*)0);
167 GSList *cfl;
168 color_filter_t *colorf;
169 dfilter_t *compiled_filter;
170 uint8_t i;
171 df_error_t *df_err = NULL((void*)0);
172 /* Go through the temporary filters and look for the same filter string.
173 * If found, clear it so that a filter can be "moved" up and down the list
174 */
175 for ( i=1 ; i<=10 ; i++ ) {
176 /* If we need to reset the temporary filter (filter==NULL), don't look
177 * for other rules with the same filter string
178 */
179 if( i!=filt_nr && filter==NULL((void*)0) )
180 continue;
181
182 name = ws_strdup_printf("%s%02d",CONVERSATION_COLOR_PREFIX,i)wmem_strdup_printf(((void*)0), "%s%02d","___conversation_color_filter___"
,i);
183 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
184 colorf = (color_filter_t *)cfl->data;
185
186 /* Only change the filter rule if this is the rule to change or if
187 * a matching filter string has been found
188 */
189 if(colorf && ( i == filt_nr || filter == NULL((void*)0) || !strcmp(filter, colorf->filter_text) ) ) {
190 /* set filter string to "frame" if we are resetting the rules
191 * or if we found a matching filter string which need to be cleared
192 */
193 tmpfilter = ( (filter==NULL((void*)0)) || (i!=filt_nr) ) ? "frame" : filter;
194 if (!dfilter_compile(tmpfilter, &compiled_filter, &df_err)dfilter_compile_full(tmpfilter, &compiled_filter, &df_err
, (1U << 1)|(1U << 2), __func__)) {
195 *err_msg = ws_strdup_printf( "Could not compile color filter name: \"%s\" text: \"%s\".\n%s", name, filter, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, name, filter, df_err->msg);
196 df_error_free(&df_err);
197 g_free(name);
198 return false0;
199 } else {
200 g_free(colorf->filter_text);
201 dfilter_free(colorf->c_colorfilter);
202 colorf->filter_text = g_strdup(tmpfilter)g_strdup_inline (tmpfilter);
203 colorf->c_colorfilter = compiled_filter;
204 colorf->disabled = ((i!=filt_nr) ? true1 : disabled);
205 /* Remember that there are now temporary coloring filters set */
206 if( filter )
207 tmp_colors_set = true1;
208 }
209 }
210 g_free(name);
211 }
212 return true1;
213}
214
215const color_filter_t *
216color_filters_tmp_color(uint8_t filter_num) {
217 char *name;
218 color_filter_t *colorf = NULL((void*)0);
219 GSList *cfl;
220
221 name = ws_strdup_printf("%s%02d", CONVERSATION_COLOR_PREFIX, filter_num)wmem_strdup_printf(((void*)0), "%s%02d", "___conversation_color_filter___"
, filter_num);
222 cfl = g_slist_find_custom(color_filter_list, name, color_filters_find_by_name_cb);
223 if (cfl) {
224 colorf = (color_filter_t *)cfl->data;
225 }
226 g_free(name);
227
228 return colorf;
229}
230
231/* Reset the temporary colorfilters */
232bool_Bool
233color_filters_reset_tmp(char **err_msg)
234{
235 uint8_t i;
236
237 for ( i=1 ; i<=10 ; i++ ) {
238 if (!color_filters_set_tmp(i, NULL((void*)0), true1, err_msg))
239 return false0;
240 }
241 /* Remember that there are now *no* temporary coloring filters set */
242 tmp_colors_set = false0;
243 return true1;
244}
245
246/* delete the specified filter */
247void
248color_filter_delete(color_filter_t *colorf)
249{
250 g_free(colorf->filter_name);
251 g_free(colorf->filter_text);
252 dfilter_free(colorf->c_colorfilter);
253 g_free(colorf);
254}
255
256/* delete the specified filter (called from g_slist_foreach) */
257static void
258color_filter_delete_cb(void *filter_arg)
259{
260 color_filter_t *colorf = (color_filter_t *)filter_arg;
261
262 color_filter_delete(colorf);
263}
264
265/* delete the specified list */
266void
267color_filter_list_delete(GSList **cfl)
268{
269 g_slist_free_full(*cfl, color_filter_delete_cb);
270 *cfl = NULL((void*)0);
271}
272
273/* clone a single list entries from normal to edit list */
274static color_filter_t *
275color_filter_clone(color_filter_t *colorf)
276{
277 color_filter_t *new_colorf;
278
279 new_colorf = g_new(color_filter_t, 1)((color_filter_t *) g_malloc_n ((1), sizeof (color_filter_t))
);
280 new_colorf->filter_name = g_strdup(colorf->filter_name)g_strdup_inline (colorf->filter_name);
281 new_colorf->filter_text = g_strdup(colorf->filter_text)g_strdup_inline (colorf->filter_text);
282 new_colorf->bg_color = colorf->bg_color;
283 new_colorf->fg_color = colorf->fg_color;
284 new_colorf->disabled = colorf->disabled;
285 new_colorf->c_colorfilter = NULL((void*)0);
286
287 return new_colorf;
288}
289
290static void
291color_filter_list_clone_cb(void *filter_arg, void *cfl_arg)
292{
293 GSList **cfl = (GSList **)cfl_arg;
294 color_filter_t *new_colorf;
295
296 new_colorf = color_filter_clone((color_filter_t *)filter_arg);
297 *cfl = g_slist_append(*cfl, new_colorf);
298}
299
300/* clone the specified list */
301static GSList *
302color_filter_list_clone(GSList *cfl)
303{
304 GSList *new_list = NULL((void*)0);
305
306 g_slist_foreach(cfl, color_filter_list_clone_cb, &new_list);
307
308 return new_list;
309}
310
311static bool_Bool
312color_filters_get(char** err_msg, color_filter_add_cb_func add_cb, const char* app_env_var_prefix)
313{
314 char *path;
315 FILE *f;
316 int ret;
317
318 /* start the list with the temporary colorizing rules */
319 color_filters_add_tmp(&color_filter_list);
320
321 /*
322 * Try to get the user's filters.
323 *
324 * Get the path for the file that would have their filters, and
325 * try to open it.
326 */
327 path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1, app_env_var_prefix);
328 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
329 if (errno(*__errno_location ()) != ENOENT2) {
330 /* Error trying to open the file; give up. */
331 *err_msg = ws_strdup_printf("Could not open filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
332 g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
333 g_free(path);
334 return false0;
335 }
336 /* They don't have any filters; try to read the global filters */
337 g_free(path);
338 return color_filters_read_globals(&color_filter_list, err_msg, add_cb, app_env_var_prefix);
339 }
340
341 /*
342 * We've opened it; try to read it.
343 */
344 ret = read_filters_file(path, f, &color_filter_list, add_cb);
345 if (ret != 0) {
346 *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
347 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
348 fclose(f);
349 g_free(path);
350 return false0;
351 }
352
353 /* Success. */
354 fclose(f);
355 g_free(path);
356 return true1;
357}
358
359/* Initialize the filter structures (reading from file) for general running, including app startup */
360bool_Bool
361color_filters_init(char** err_msg, color_filter_add_cb_func add_cb, const char* app_env_var_prefix)
362{
363 /* delete all currently existing filters */
364 color_filter_list_delete(&color_filter_list);
365
366 /* now try to construct the filters list */
367 return color_filters_get(err_msg, add_cb, app_env_var_prefix);
368}
369
370bool_Bool
371color_filters_reload(char** err_msg, color_filter_add_cb_func add_cb, const char* app_env_var_prefix)
372{
373 /* "move" old entries to the deleted list
374 * we must keep them until the dissection no longer needs them */
375 color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
376 color_filter_list = NULL((void*)0);
377
378 /* now try to construct the filters list */
379 return color_filters_get(err_msg, add_cb, app_env_var_prefix);
380}
381
382void
383color_filters_cleanup(void)
384{
385 /* delete the previously deleted filters */
386 color_filter_list_delete(&color_filter_deleted_list);
387}
388
389typedef struct _color_clone
390{
391 void *user_data;
392 color_filter_add_cb_func add_cb;
393} color_clone_t;
394
395static void
396color_filters_clone_cb(void *filter_arg, void *user_data)
397{
398 color_clone_t* clone_data = (color_clone_t*)user_data;
399 color_filter_t * new_colorf = color_filter_clone((color_filter_t *)filter_arg);
400
401 clone_data->add_cb (new_colorf, clone_data->user_data);
402}
403
404void
405color_filters_clone(void *user_data, color_filter_add_cb_func add_cb)
406{
407 color_clone_t clone_data;
408
409 clone_data.user_data = user_data;
410 clone_data.add_cb = add_cb;
411 g_slist_foreach(color_filter_list, color_filters_clone_cb, &clone_data);
412}
413
414
415static void
416color_filter_compile_cb(void *filter_arg, void *err)
417{
418 color_filter_t *colorf = (color_filter_t *)filter_arg;
419 char **err_msg = (char**)err;
420 df_error_t *df_err = NULL((void*)0);
421
422 ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void*
)0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 422, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)"
); } while (0);
423
424 /* If the filter is disabled it doesn't matter if it compiles or not. */
425 if (colorf->disabled) return;
426
427 if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf->
c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__
)) {
428 *err_msg = ws_strdup_printf("Could not compile color filter name: \"%s\" text: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg)
429 colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Could not compile color filter name: \"%s\" text: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg);
430 df_error_free(&df_err);
431 /* this filter was compilable before, so this should never happen */
432 /* except if the OK button of the parent window has been clicked */
433 /* so don't use ws_assert_not_reached() but check the filters again */
434 }
435}
436
437static void
438color_filter_validate_cb(void *filter_arg, void *err)
439{
440 color_filter_t *colorf = (color_filter_t *)filter_arg;
441 char **err_msg = (char**)err;
442 df_error_t *df_err = NULL((void*)0);
443
444 ws_assert(colorf->c_colorfilter == NULL)do { if ((1) && !(colorf->c_colorfilter == ((void*
)0))) ws_log_fatal_full("Epan", LOG_LEVEL_ERROR, "epan/color_filters.c"
, 444, __func__, "assertion failed: %s", "colorf->c_colorfilter == ((void*)0)"
); } while (0);
445
446 /* If the filter is disabled it doesn't matter if it compiles or not. */
447 if (colorf->disabled) return;
448
449 if (!dfilter_compile(colorf->filter_text, &colorf->c_colorfilter, &df_err)dfilter_compile_full(colorf->filter_text, &colorf->
c_colorfilter, &df_err, (1U << 1)|(1U << 2), __func__
)) {
450 *err_msg = ws_strdup_printf("Disabling color filter name: \"%s\" filter: \"%s\".\n%s",wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg)
451 colorf->filter_name, colorf->filter_text, df_err->msg)wmem_strdup_printf(((void*)0), "Disabling color filter name: \"%s\" filter: \"%s\".\n%s"
, colorf->filter_name, colorf->filter_text, df_err->
msg);
452 df_error_free(&df_err);
453
454 /* Disable the color filter in the list of color filters. */
455 colorf->disabled = true1;
456 }
457
458 /* XXX: What if the color filter tests "frame.coloring_rule.name" or
459 * "frame.coloring_rule.string"?
460 */
461}
462
463/* apply changes from the edit list */
464bool_Bool
465color_filters_apply(GSList *tmp_cfl, GSList *edit_cfl, char** err_msg)
466{
467 bool_Bool ret = true1;
468
469 *err_msg = NULL((void*)0);
470
471 /* "move" old entries to the deleted list
472 * we must keep them until the dissection no longer needs them */
473 color_filter_deleted_list = g_slist_concat(color_filter_deleted_list, color_filter_list);
474 color_filter_list = NULL((void*)0);
475
476 /* clone all list entries from tmp/edit to normal list */
477 color_filter_list_delete(&color_filter_valid_list);
478 color_filter_valid_list = color_filter_list_clone(tmp_cfl);
479 color_filter_valid_list = g_slist_concat(color_filter_valid_list,
480 color_filter_list_clone(edit_cfl) );
481
482 /* compile all filter */
483 g_slist_foreach(color_filter_valid_list, color_filter_validate_cb, err_msg);
484 if (*err_msg != NULL((void*)0)) {
485 ret = false0;
486 }
487
488 /* clone all list entries from tmp/edit to normal list */
489 color_filter_list = color_filter_list_clone(color_filter_valid_list);
490
491 /* compile all filter */
492 g_slist_foreach(color_filter_list, color_filter_compile_cb, err_msg);
493 if (*err_msg != NULL((void*)0)) {
494 ret = false0;
495 }
496
497 return ret;
498}
499
500bool_Bool
501color_filters_used(void)
502{
503 return color_filter_list != NULL((void*)0) && filters_enabled;
504}
505
506bool_Bool
507tmp_color_filters_used(void)
508{
509 return tmp_colors_set;
510}
511
512/* prepare the epan_dissect_t for the filter */
513static void
514prime_edt(void *data, void *user_data)
515{
516 color_filter_t *colorf = (color_filter_t *)data;
517 epan_dissect_t *edt = (epan_dissect_t *)user_data;
518
519 if (colorf->c_colorfilter != NULL((void*)0))
520 epan_dissect_prime_with_dfilter(edt, colorf->c_colorfilter);
521}
522
523/* Prime the epan_dissect_t with all the compiler
524 * color filters in 'color_filter_list'. */
525void
526color_filters_prime_edt(epan_dissect_t *edt)
527{
528 if (color_filters_used())
529 g_slist_foreach(color_filter_list, prime_edt, edt);
530}
531
532static int
533find_hfid(const void *data, const void *user_data)
534{
535 color_filter_t *colorf = (color_filter_t *)data;
536 int hfid = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
537
538 if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
539 if (dfilter_interested_in_field(colorf->c_colorfilter, hfid)) {
540 return 0;
541 }
542 }
543 return -1;
544}
545
546bool_Bool
547color_filters_use_hfid(int hfid)
548{
549 GSList *item = NULL((void*)0);
550 if (color_filters_used())
551 item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(hfid)((gpointer) (glong) (hfid)), find_hfid);
552 return (item != NULL((void*)0));
553}
554
555static int
556find_proto(const void *data, const void *user_data)
557{
558 color_filter_t *colorf = (color_filter_t *)data;
559 int proto_id = GPOINTER_TO_INT(user_data)((gint) (glong) (user_data));
560
561 if ((!colorf->disabled) && colorf->c_colorfilter != NULL((void*)0)) {
562 if (dfilter_interested_in_proto(colorf->c_colorfilter, proto_id)) {
563 return 0;
564 }
565 }
566 return -1;
567}
568
569bool_Bool
570color_filters_use_proto(int proto_id)
571{
572 GSList *item = NULL((void*)0);
573 if (color_filters_used())
574 item = g_slist_find_custom(color_filter_list, GINT_TO_POINTER(proto_id)((gpointer) (glong) (proto_id)), find_proto);
575 return (item != NULL((void*)0));
576}
577
578/* * Return the color_t for later use */
579const color_filter_t *
580color_filters_colorize_packet(epan_dissect_t *edt)
581{
582 GSList *curr;
583 color_filter_t *colorf;
584
585 /* If we have color filters, "search" for the matching one. */
586 if ((edt->tree != NULL((void*)0)) && (color_filters_used())) {
587 curr = color_filter_list;
588
589 while(curr != NULL((void*)0)) {
590 colorf = (color_filter_t *)curr->data;
591 if ( (!colorf->disabled) &&
592 (colorf->c_colorfilter != NULL((void*)0)) &&
593 dfilter_apply_edt(colorf->c_colorfilter, edt)) {
594 return colorf;
595 }
596 curr = g_slist_next(curr)((curr) ? (((GSList *)(curr))->next) : ((void*)0));
597 }
598 }
599
600 return NULL((void*)0);
601}
602
603/* read filters from the given file */
604/* XXX - Would it make more sense to use GStrings here instead of reallocing
605 our buffers? */
606static int
607read_filters_file(const char *path, FILE *f, void *user_data, color_filter_add_cb_func add_cb)
608{
609#define INIT_BUF_SIZE128 128
610 char *name;
611 char *filter_exp;
612 uint32_t name_len = INIT_BUF_SIZE128;
613 uint32_t filter_exp_len = INIT_BUF_SIZE128;
614 uint32_t i = 0;
615 int c;
616 uint16_t fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
617 bool_Bool disabled = false0;
618 bool_Bool skip_end_of_line = false0;
619 int ret = 0;
620
621 name = (char *)g_malloc(name_len + 1);
622 filter_exp = (char *)g_malloc(filter_exp_len + 1);
623
624 while (1) {
3
←
Loop condition is true. Entering loop body
→
37
←
Loop condition is true. Entering loop body
→
625
626 if (skip_end_of_line
3.1
'skip_end_of_line' is false
37.1
'skip_end_of_line' is true
) {
38
←
Taking true branch
→
627 do {
41
←
Loop condition is false. Exiting loop
→
628 c = ws_getc_unlockedgetc_unlocked(f);
629 } while (c != EOF(-1) && c != '\n');
39
←
Assuming the condition is true
→
40
←
Assuming the condition is false
→
630 if (c == EOF(-1))
42
←
Taking false branch
→
631 break;
632 disabled = false0;
633 skip_end_of_line = false0;
634 }
635
636 while ((c = ws_getc_unlockedgetc_unlocked(f)) != EOF(-1) && g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)) {
4
←
Assuming the condition is true
→
5
←
Loop condition is false. Execution continues on line 642
→
43
←
Assuming the condition is true
→
44
←
Loop condition is false. Execution continues on line 642
→
637 if (c == '\n') {
638 continue;
639 }
640 }
641
642 if (c == EOF(-1))
6
←
Taking false branch
→
45
←
Taking false branch
→
643 break;
644
645 if (c == '!') {
7
←
Assuming the condition is false
→
8
←
Taking false branch
→
46
←
Assuming the condition is false
→
47
←
Taking false branch
→
646 disabled = true1;
647 continue;
648 }
649
650 /* skip # comments and invalid lines */
651 if (c != '@') {
9
←
Assuming the condition is false
→
10
←
Taking false branch
→
48
←
Assuming the condition is false
→
49
←
Taking false branch
→
652 skip_end_of_line = true1;
653 continue;
654 }
655
656 /* we get the @ delimiter.
657 * Format is:
658 * @name@filter expression@[background r,g,b][foreground r,g,b]
659 */
660
661 /* retrieve name */
662 i = 0;
663 while (1) {
11
←
Loop condition is true. Entering loop body
→
16
←
Loop condition is true. Entering loop body
→
50
←
Loop condition is true. Entering loop body
→
55
←
Loop condition is true. Entering loop body
→
664 c = ws_getc_unlockedgetc_unlocked(f);
665 if (c == EOF(-1) || c == '@')
12
←
Assuming the condition is false
→
13
←
Assuming the condition is false
→
14
←
Taking false branch
→
17
←
Assuming the condition is false
→
18
←
Assuming the condition is true
→
19
←
Taking true branch
→
51
←
Assuming the condition is false
→
52
←
Assuming the condition is false
→
53
←
Taking false branch
→
56
←
Assuming the condition is false
→
57
←
Assuming the condition is true
→
58
←
Taking true branch
→
666 break;
20
←
 Execution continues on line 674
→
59
←
 Execution continues on line 674
→
667 if (i
14.1
'i' is < 'name_len'
53.1
'i' is < 'name_len'
 >= name_len) {
15
←
Taking false branch
→
54
←
Taking false branch
→
668 /* buffer isn't long enough; double its length.*/
669 name_len *= 2;
670 name = (char *)g_realloc(name, name_len + 1);
671 }
672 name[i++] = c;
673 }
674 name[i] = '\0';
675
676 if (c == EOF(-1)) {
21
←
Taking false branch
→
60
←
Taking false branch
→
677 break;
678 } else if (i
21.1
'i' is not equal to 0
60.1
'i' is not equal to 0
 == 0) {
22
←
Taking false branch
→
61
←
Taking false branch
→
679 skip_end_of_line = true1;
680 continue;
681 }
682
683 /* retrieve filter expression */
684 i = 0;
685 while (1) {
23
←
Loop condition is true. Entering loop body
→
28
←
Loop condition is true. Entering loop body
→
62
←
Loop condition is true. Entering loop body
→
67
←
Loop condition is true. Entering loop body
→
686 c = ws_getc_unlockedgetc_unlocked(f);
687 if (c == EOF(-1) || c == '@')
24
←
Assuming the condition is false
→
25
←
Assuming the condition is false
→
26
←
Taking false branch
→
29
←
Assuming the condition is false
→
30
←
Assuming the condition is true
→
31
←
Taking true branch
→
63
←
Assuming the condition is false
→
64
←
Assuming the condition is false
→
65
←
Taking false branch
→
68
←
Assuming the condition is false
→
69
←
Assuming the condition is true
→
70
←
Taking true branch
→
688 break;
32
←
 Execution continues on line 696
→
71
←
 Execution continues on line 696
→
689 if (i
26.1
'i' is < 'filter_exp_len'
65.1
'i' is < 'filter_exp_len'
 >= filter_exp_len) {
27
←
Taking false branch
→
66
←
Taking false branch
→
690 /* buffer isn't long enough; double its length.*/
691 filter_exp_len *= 2;
692 filter_exp = (char *)g_realloc(filter_exp, filter_exp_len + 1);
693 }
694 filter_exp[i++] = c;
695 }
696 filter_exp[i] = '\0';
697
698 if (c == EOF(-1)) {
33
←
Taking false branch
→
72
←
Taking false branch
→
699 break;
700 } else if (i
33.1
'i' is not equal to 0
72.1
'i' is not equal to 0
 == 0) {
34
←
Taking false branch
→
73
←
Taking false branch
→
701 skip_end_of_line = true1;
702 continue;
703 }
704
705 /* retrieve background and foreground colors */
706 if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
35
←
Assuming stream reaches end-of-file here
→
36
←
Taking false branch
→
74
←
Read function called when stream is in EOF state. Function has no effect
707 &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
708
709 /* we got a complete color filter */
710
711 color_t bg_color, fg_color;
712 color_filter_t *colorf;
713 dfilter_t *temp_dfilter = NULL((void*)0);
714 df_error_t *df_err = NULL((void*)0);
715
716 if (!disabled && !dfilter_compile(filter_exp, &temp_dfilter, &df_err)dfilter_compile_full(filter_exp, &temp_dfilter, &df_err
, (1U << 1)|(1U << 2), __func__)) {
717 report_warning("Disabling color filter: Could not compile \"%s\" in colorfilters file \"%s\".\n%s", name, path, df_err->msg);
718 df_error_free(&df_err);
719
720 /* skip_end_of_line = true; */
721 disabled = true1;
722 }
723
724 fg_color.red = fg_r;
725 fg_color.green = fg_g;
726 fg_color.blue = fg_b;
727
728 bg_color.red = bg_r;
729 bg_color.green = bg_g;
730 bg_color.blue = bg_b;
731
732 colorf = color_filter_new(name, filter_exp, &bg_color,
733 &fg_color, disabled);
734 if(user_data == &color_filter_list) {
735 GSList **cfl = (GSList **)user_data;
736
737 /* internal call */
738 colorf->c_colorfilter = temp_dfilter;
739 *cfl = g_slist_append(*cfl, colorf);
740 } else {
741 /* external call */
742 /* just editing, don't need the compiled filter */
743 dfilter_free(temp_dfilter);
744 add_cb(colorf, user_data);
745 }
746 } /* if sscanf */
747
748 skip_end_of_line = true1;
749 }
750
751 if (ferror(f))
752 ret = errno(*__errno_location ());
753
754 g_free(name);
755 g_free(filter_exp);
756 return ret;
757}
758
759/* read filters from the filter file */
760bool_Bool
761color_filters_read_globals(void *user_data, char** err_msg, color_filter_add_cb_func add_cb, const char* app_env_var_prefix)
762{
763 char *path;
764 FILE *f;
765 int ret;
766
767 /*
768 * Try to get the global filters.
769 *
770 * Get the path for the file that would have the global filters, and
771 * try to open it.
772 */
773 path = get_datafile_path(COLORFILTERS_FILE_NAME"colorfilters", app_env_var_prefix);
774 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
775 if (errno(*__errno_location ()) != ENOENT2) {
776 /* Error trying to open the file; give up. */
777 *err_msg = ws_strdup_printf("Could not open global filter file\n\"%s\": %s.", path,wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
778 g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
779 g_free(path);
780 return false0;
781 }
782
783 /*
784 * There is no global filter file; treat that as equivalent to
785 * that file existing bug being empty, and say we succeeded.
786 */
787 g_free(path);
788 return true1;
789 }
790
791 ret = read_filters_file(path, f, user_data, add_cb);
792 if (ret != 0) {
793 *err_msg = ws_strdup_printf("Error reading global filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
794 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading global filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
795 fclose(f);
796 g_free(path);
797 return false0;
798 }
799
800 fclose(f);
801 g_free(path);
802 return true1;
803}
804
805/* read filters from some other filter file (import) */
806bool_Bool
807color_filters_import(const char *path, void *user_data, char **err_msg, color_filter_add_cb_func add_cb)
808{
809 FILE *f;
810 int ret;
811
812 if ((f = ws_fopenfopen(path, "r")) == NULL((void*)0)) {
1
Taking false branch
→
813 *err_msg = ws_strdup_printf("Could not open filter file\n%s\nfor reading: %s.",wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s."
, path, g_strerror((*__errno_location ())))
814 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open filter file\n%s\nfor reading: %s."
, path, g_strerror((*__errno_location ())));
815 return false0;
816 }
817
818 ret = read_filters_file(path, f, user_data, add_cb);
2
←
Calling 'read_filters_file'
→
819 if (ret != 0) {
820 *err_msg = ws_strdup_printf("Error reading filter file\n\"%s\": %s.",wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())))
821 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Error reading filter file\n\"%s\": %s."
, path, g_strerror((*__errno_location ())));
822 fclose(f);
823 return false0;
824 }
825
826 fclose(f);
827 return true1;
828}
829
830struct write_filter_data
831{
832 FILE *f;
833 bool_Bool only_selected;
834};
835
836/* save a single filter */
837static void
838write_filter(void *filter_arg, void *data_arg)
839{
840 struct write_filter_data *data = (struct write_filter_data *)data_arg;
841 color_filter_t *colorf = (color_filter_t *)filter_arg;
842 FILE *f = data->f;
843
844 if ( (!data->only_selected) &&
845 (strstr(colorf->filter_name,CONVERSATION_COLOR_PREFIX"___conversation_color_filter___")==NULL((void*)0)) ) {
846 fprintf(f,"%s@%s@%s@[%u,%u,%u][%u,%u,%u]\n",
847 colorf->disabled ? "!" : "",
848 colorf->filter_name,
849 colorf->filter_text,
850 colorf->bg_color.red,
851 colorf->bg_color.green,
852 colorf->bg_color.blue,
853 colorf->fg_color.red,
854 colorf->fg_color.green,
855 colorf->fg_color.blue);
856 }
857}
858
859/* save filters in a filter file */
860static bool_Bool
861write_filters_file(GSList *cfl, FILE *f, bool_Bool only_selected, const char* app_name)
862{
863 struct write_filter_data data;
864
865 data.f = f;
866 data.only_selected = only_selected;
867
868 fprintf(f,"# This file was created by %s. Edit with care.\n", app_name);
869 g_slist_foreach(cfl, write_filter, &data);
870 return true1;
871}
872
873/* save filters in users filter file */
874bool_Bool
875color_filters_write(GSList *cfl, const char* app_name, const char* app_env_var_prefix, char** err_msg)
876{
877 char *pf_dir_path;
878 char *path;
879 FILE *f;
880
881 /* Create the directory that holds personal configuration files,
882 if necessary. */
883 if (create_persconffile_dir(app_env_var_prefix, &pf_dir_path) == -1) {
884 *err_msg = ws_strdup_printf("Can't create directory\n\"%s\"\nfor color files: %s.",wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s."
, pf_dir_path, g_strerror((*__errno_location ())))
885 pf_dir_path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Can't create directory\n\"%s\"\nfor color files: %s."
, pf_dir_path, g_strerror((*__errno_location ())));
886 g_free(pf_dir_path);
887 return false0;
888 }
889
890 path = get_persconffile_path(COLORFILTERS_FILE_NAME"colorfilters", true1, app_env_var_prefix);
891 if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
892 *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())))
893 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())));
894 g_free(path);
895 return false0;
896 }
897 g_free(path);
898 write_filters_file(cfl, f, false0, app_name);
899 fclose(f);
900 return true1;
901}
902
903/* save filters in some other filter file (export) */
904bool_Bool
905color_filters_export(const char *path, GSList *cfl, bool_Bool only_marked, const char* app_name, char** err_msg)
906{
907 FILE *f;
908
909 if ((f = ws_fopenfopen(path, "w+")) == NULL((void*)0)) {
910 *err_msg = ws_strdup_printf("Could not open\n%s\nfor writing: %s.",wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())))
911 path, g_strerror(errno))wmem_strdup_printf(((void*)0), "Could not open\n%s\nfor writing: %s."
, path, g_strerror((*__errno_location ())));
912 return false0;
913 }
914 write_filters_file(cfl, f, only_marked, app_name);
915 fclose(f);
916 return true1;
917}
918
919/*
920 * Editor modelines - https://www.wireshark.org/tools/modelines.html
921 *
922 * Local variables:
923 * c-basic-offset: 4
924 * tab-width: 8
925 * indent-tabs-mode: nil
926 * End:
927 *
928 * vi: set shiftwidth=4 tabstop=8 expandtab:
929 * :indentSize=4:tabSize=8:noTabs=true:
930 */