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-rw-r--r--color_filters.c482
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+/* color_filters.c
+ * Routines for color filters
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * Updated 1 Dec 10 jjm
+ */
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+#include <ctype.h>
+#include <string.h>
+
+#include <epan/filesystem.h>
+
+#include <epan/packet.h>
+#include "color.h"
+#include "color_filters.h"
+#include "file.h"
+#include <epan/dfilter/dfilter.h>
+#include "simple_dialog.h"
+
+static gboolean read_filters(void);
+static gboolean read_global_filters(void);
+
+GSList *filter_list = NULL;
+GSList *removed_filter_list = NULL;
+
+/* Remove the specified filter from the list of existing color filters,
+ * and add it to the list of removed color filters.
+ * This way, unmarking and marking a packet which matches a now removed
+ * color filter will still be colored correctly as the color filter is
+ * still reachable. */
+void remove_color_filter(color_filter_t *colorf)
+{
+ /* Remove colorf from the list of color filters */
+ filter_list = g_slist_remove(filter_list, colorf);
+ /* Add colorf to the list of removed color filters */
+ removed_filter_list = g_slist_prepend(removed_filter_list, colorf);
+}
+
+/* delete the specified filter */
+static void
+delete_color_filter(color_filter_t *colorf)
+{
+ if (colorf->filter_name != NULL)
+ g_free(colorf->filter_name);
+ if (colorf->filter_text != NULL)
+ g_free(colorf->filter_text);
+ if (colorf->c_colorfilter != NULL)
+ dfilter_free(colorf->c_colorfilter);
+ g_free(colorf);
+}
+
+/* delete the specified filter as an iterator*/
+static void
+delete_color_filter_it(gpointer filter_arg, gpointer unused _U_)
+{
+ color_filter_t *colorf = filter_arg;
+ delete_color_filter(colorf);
+}
+
+/* delete all the filters */
+static void
+delete_all_color_filters (void)
+{
+ g_slist_foreach(filter_list, delete_color_filter_it, NULL);
+ g_slist_free(filter_list);
+ filter_list = NULL;
+ g_slist_foreach(removed_filter_list, delete_color_filter_it, NULL);
+ g_slist_free(removed_filter_list);
+ removed_filter_list = NULL;
+}
+
+/* Initialize the filter structures (reading from file) for general running, including app startup */
+void
+colfilter_init(void)
+{
+ delete_all_color_filters();
+ if (!read_filters())
+ read_global_filters();
+}
+
+/* Create a new filter */
+color_filter_t *
+new_color_filter(gchar *name, /* The name of the filter to create */
+ gchar *filter_string, /* The string representing the filter */
+ color_t *bg_color, /* The background color */
+ color_t *fg_color) /* The foreground color */
+{
+ color_filter_t *colorf;
+
+ colorf = g_malloc(sizeof (color_filter_t));
+ colorf->filter_name = g_strdup(name);
+ colorf->filter_text = g_strdup(filter_string);
+ colorf->bg_color = *bg_color;
+ colorf->fg_color = *fg_color;
+ colorf->c_colorfilter = NULL;
+ colorf->edit_dialog = NULL;
+ colorf->marked = FALSE;
+ filter_list = g_slist_append(filter_list, colorf);
+ return colorf;
+}
+
+static void
+prime_edt(gpointer data, gpointer user_data)
+{
+ color_filter_t *colorf = data;
+ epan_dissect_t *edt = user_data;
+
+ if (colorf->c_colorfilter != NULL)
+ epan_dissect_prime_dfilter(edt, colorf->c_colorfilter);
+}
+
+/* Prime the epan_dissect_t with all the compiler
+ * color filters in 'filter_list'. */
+void
+filter_list_prime_edt(epan_dissect_t *edt)
+{
+ g_slist_foreach(filter_list, prime_edt, edt);
+}
+
+/* read filters from the given file */
+static gboolean
+read_filters_file(FILE *f, gpointer arg)
+{
+#define INIT_BUF_SIZE 128
+ gchar *name = NULL;
+ gchar *filter_exp = NULL;
+ guint32 name_len = INIT_BUF_SIZE;
+ guint32 filter_exp_len = INIT_BUF_SIZE;
+ guint32 i = 0;
+ gint32 c;
+ guint16 fg_r, fg_g, fg_b, bg_r, bg_g, bg_b;
+ gboolean skip_end_of_line = FALSE;
+
+ name = g_malloc(name_len + 1);
+ filter_exp = g_malloc(filter_exp_len + 1);
+
+ while (1) {
+
+ if (skip_end_of_line) {
+ do {
+ c = getc(f);
+ } while (c != EOF && c != '\n');
+ if (c == EOF)
+ break;
+ skip_end_of_line = FALSE;
+ }
+
+ while ((c = getc(f)) != EOF && isspace(c)) {
+ if (c == '\n') {
+ continue;
+ }
+ }
+
+ if (c == EOF)
+ break;
+
+ /* skip # comments and invalid lines */
+ if (c != '@') {
+ skip_end_of_line = TRUE;
+ continue;
+ }
+
+ /* we get the @ delimiter.
+ * Format is:
+ * @name@filter expression@[background r,g,b][foreground r,g,b]
+ */
+
+ /* retrieve name */
+ i = 0;
+ while (1) {
+ c = getc(f);
+ if (c == EOF || c == '@')
+ break;
+ if (i >= name_len) {
+ /* buffer isn't long enough; double its length.*/
+ name_len *= 2;
+ name = g_realloc(name, name_len + 1);
+ }
+ name[i++] = c;
+ }
+ name[i] = '\0';
+
+ if (c == EOF) {
+ break;
+ } else if (i == 0) {
+ skip_end_of_line = TRUE;
+ continue;
+ }
+
+ /* retrieve filter expression */
+ i = 0;
+ while (1) {
+ c = getc(f);
+ if (c == EOF || c == '@')
+ break;
+ if (i >= filter_exp_len) {
+ /* buffer isn't long enough; double its length.*/
+ filter_exp_len *= 2;
+ filter_exp = g_realloc(filter_exp, filter_exp_len + 1);
+ }
+ filter_exp[i++] = c;
+ }
+ filter_exp[i] = '\0';
+
+ if (c == EOF) {
+ break;
+ } else if (i == 0) {
+ skip_end_of_line = TRUE;
+ continue;
+ }
+
+ /* retrieve background and foreground colors */
+ if (fscanf(f,"[%hu,%hu,%hu][%hu,%hu,%hu]",
+ &bg_r, &bg_g, &bg_b, &fg_r, &fg_g, &fg_b) == 6) {
+
+ /* we got a complete color filter */
+
+ color_t bg_color, fg_color;
+ color_filter_t *colorf;
+ dfilter_t *temp_dfilter;
+
+ if (!dfilter_compile(filter_exp, &temp_dfilter)) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not compile color filter %s from saved filters.\n%s",
+ name, dfilter_error_msg);
+ skip_end_of_line = TRUE;
+ continue;
+ }
+
+ if (!create_color(&fg_color, fg_r, fg_g, fg_b)) {
+ /* oops */
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not allocate foreground color "
+ "specified in input file for %s.", name);
+ dfilter_free(temp_dfilter);
+ skip_end_of_line = TRUE;
+ continue;
+ }
+ if (!create_color(&bg_color, bg_r, bg_g, bg_b)) {
+ /* oops */
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not allocate background color "
+ "specified in input file for %s.", name);
+ dfilter_free(temp_dfilter);
+ skip_end_of_line = TRUE;
+ continue;
+ }
+
+ colorf = new_color_filter(name, filter_exp, &bg_color,
+ &fg_color);
+ colorf->c_colorfilter = temp_dfilter;
+
+ if (arg != NULL)
+ color_add_filter_cb (colorf, arg);
+ } /* if sscanf */
+
+ skip_end_of_line = TRUE;
+ }
+
+ g_free(name);
+ g_free(filter_exp);
+ return TRUE;
+}
+
+/* read filters from the user's filter file */
+static gboolean
+read_filters(void)
+{
+ gchar *path;
+ FILE *f;
+ gboolean ret;
+
+ /* decide what file to open (from dfilter code) */
+ path = get_persconffile_path("colorfilters", FALSE);
+ if ((f = fopen(path, "r")) == NULL) {
+ if (errno != ENOENT) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not open filter file\n\"%s\": %s.", path,
+ strerror(errno));
+ }
+ g_free(path);
+ return FALSE;
+ }
+ g_free(path);
+ path = NULL;
+
+ ret = read_filters_file(f, NULL);
+ fclose(f);
+ return ret;
+}
+
+/* read filters from the filter file */
+static gboolean
+read_global_filters(void)
+{
+ gchar *path;
+ FILE *f;
+ gboolean ret;
+
+ /* decide what file to open (from dfilter code) */
+ path = get_datafile_path("colorfilters");
+ if ((f = fopen(path, "r")) == NULL) {
+ if (errno != ENOENT) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not open global filter file\n\"%s\": %s.", path,
+ strerror(errno));
+ }
+ g_free(path);
+ return FALSE;
+ }
+ g_free(path);
+ path = NULL;
+
+ ret = read_filters_file(f, NULL);
+ fclose(f);
+ return ret;
+}
+
+/* save filters in some other filter file */
+
+gboolean
+read_other_filters(gchar *path, gpointer arg)
+{
+ FILE *f;
+ gboolean ret;
+
+ if ((f = fopen(path, "r")) == NULL) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not open\n%s\nfor reading: %s.",
+ path, strerror(errno));
+ return FALSE;
+ }
+
+ ret = read_filters_file(f, arg);
+ fclose(f);
+ return ret;
+}
+
+struct write_filter_data
+{
+ FILE * f;
+ gboolean only_marked;
+};
+
+static void
+write_filter(gpointer filter_arg, gpointer data_arg)
+{
+ struct write_filter_data *data = data_arg;
+ color_filter_t *colorf = filter_arg;
+ FILE *f = data->f;
+
+ if (colorf->marked || !data->only_marked) {
+ fprintf(f,"@%s@%s@[%d,%d,%d][%d,%d,%d]\n",
+ colorf->filter_name,
+ colorf->filter_text,
+ colorf->bg_color.red,
+ colorf->bg_color.green,
+ colorf->bg_color.blue,
+ colorf->fg_color.red,
+ colorf->fg_color.green,
+ colorf->fg_color.blue);
+ }
+}
+
+/* save filters in a filter file */
+gboolean
+write_filters_file(FILE *f, gboolean only_marked)
+{
+ struct write_filter_data data;
+
+ data.f = f;
+ data.only_marked = only_marked;
+
+ fprintf(f,"# DO NOT EDIT THIS FILE! It was created by Ethereal\n");
+ g_slist_foreach(filter_list, write_filter, &data);
+ return TRUE;
+}
+
+/* save filters in users filter file */
+
+gboolean
+write_filters(void)
+{
+ gchar *pf_dir_path;
+ const gchar *path;
+ FILE *f;
+
+ /* Create the directory that holds personal configuration files,
+ if necessary. */
+ if (create_persconffile_dir(&pf_dir_path) == -1) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Can't create directory\n\"%s\"\nfor color files: %s.",
+ pf_dir_path, strerror(errno));
+ g_free(pf_dir_path);
+ return FALSE;
+ }
+
+ path = get_persconffile_path("colorfilters", TRUE);
+ if ((f = fopen(path, "w+")) == NULL) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not open\n%s\nfor writing: %s.",
+ path, strerror(errno));
+ return FALSE;
+ }
+ write_filters_file(f, FALSE);
+ fclose(f);
+ return TRUE;
+}
+
+/* delete users filter file and reload global filters*/
+
+gboolean
+revert_filters(void)
+{
+ gchar *pf_dir_path;
+ const gchar *path;
+
+ /* Create the directory that holds personal configuration files,
+ if necessary. */
+ if (create_persconffile_dir(&pf_dir_path) == -1) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Can't create directory\n\"%s\"\nfor color files: %s.",
+ pf_dir_path, strerror(errno));
+ g_free(pf_dir_path);
+ return FALSE;
+ }
+
+ path = get_persconffile_path("colorfilters", TRUE);
+ if (!deletefile(path)) {
+ g_free((gchar *)path);
+ return FALSE;
+ }
+
+ g_free((gchar *)path);
+
+ /* Reload the (global) filters - Note: this does not update the dialog. */
+ colfilter_init();
+ return TRUE;
+}
+
+
+/* save filters in some other filter file */
+
+gboolean
+write_other_filters(gchar *path, gboolean only_marked)
+{
+ FILE *f;
+
+ if ((f = fopen(path, "w+")) == NULL) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Could not open\n%s\nfor writing: %s.",
+ path, strerror(errno));
+ return FALSE;
+ }
+ write_filters_file(f, only_marked);
+ fclose(f);
+ return TRUE;
+}