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