1998-09-16 02:39:15 +00:00
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/* packet.c
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* Routines for packet disassembly
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*
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1998-11-17 04:29:13 +00:00
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* $Id: packet.c,v 1.11 1998/11/17 04:29:08 gerald Exp $
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1998-09-16 03:22:19 +00:00
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*
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1998-09-16 02:39:15 +00:00
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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1998-10-10 03:32:20 +00:00
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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1998-09-16 02:39:15 +00:00
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#include <gtk/gtk.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <ctype.h>
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1998-10-12 01:40:57 +00:00
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#include <time.h>
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1998-09-16 02:39:15 +00:00
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1998-10-10 03:32:20 +00:00
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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1998-09-16 02:39:15 +00:00
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include "ethereal.h"
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1998-09-27 22:12:47 +00:00
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#include "packet.h"
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1998-09-16 02:39:15 +00:00
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#include "etypes.h"
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#include "file.h"
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extern GtkWidget *byte_view;
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extern GdkFont *m_r_font, *m_b_font;
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extern capture_file cf;
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gchar *
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ether_to_str(guint8 *ad) {
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static gchar str[3][18];
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static gchar *cur;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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sprintf(cur, "%02x:%02x:%02x:%02x:%02x:%02x", ad[0], ad[1], ad[2],
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ad[3], ad[4], ad[5]);
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return cur;
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}
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gchar *
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ip_to_str(guint8 *ad) {
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static gchar str[3][16];
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static gchar *cur;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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sprintf(cur, "%d.%d.%d.%d", ad[0], ad[1], ad[2], ad[3]);
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return cur;
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}
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void
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packet_hex_print(GtkText *bv, guchar *pd, gint len, gint bstart, gint blen) {
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gint i = 0, j, k, cur;
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gchar line[128], hexchars[] = "0123456789abcdef";
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GdkFont *cur_font, *new_font;
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while (i < len) {
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/* Print the line number */
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sprintf(line, "%04x ", i);
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gtk_text_insert(bv, m_r_font, NULL, NULL, line, -1);
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/* Do we start in bold? */
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cur_font = (i >= bstart && i < (bstart + blen)) ? m_b_font : m_r_font;
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j = i;
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k = i + BYTE_VIEW_WIDTH;
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cur = 0;
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/* Print the hex bit */
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while (i < k) {
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if (i < len) {
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line[cur++] = hexchars[(pd[i] & 0xf0) >> 4];
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line[cur++] = hexchars[pd[i] & 0x0f];
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} else {
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line[cur++] = ' '; line[cur++] = ' ';
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}
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line[cur++] = ' ';
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i++;
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/* Did we cross a bold/plain boundary? */
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new_font = (i >= bstart && i < (bstart + blen)) ? m_b_font : m_r_font;
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if (cur_font != new_font) {
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gtk_text_insert(bv, cur_font, NULL, NULL, line, cur);
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cur_font = new_font;
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cur = 0;
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}
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}
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line[cur++] = ' ';
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gtk_text_insert(bv, cur_font, NULL, NULL, line, cur);
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cur = 0;
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i = j;
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/* Print the ASCII bit */
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cur_font = (i >= bstart && i < (bstart + blen)) ? m_b_font : m_r_font;
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while (i < k) {
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if (i < len) {
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line[cur++] = (isgraph(pd[i])) ? pd[i] : '.';
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} else {
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line[cur++] = ' ';
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}
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i++;
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/* Did we cross a bold/plain boundary? */
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new_font = (i >= bstart && i < (bstart + blen)) ? m_b_font : m_r_font;
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if (cur_font != new_font) {
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gtk_text_insert(bv, cur_font, NULL, NULL, line, cur);
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cur_font = new_font;
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cur = 0;
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}
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}
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line[cur++] = '\n';
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line[cur] = '\0';
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gtk_text_insert(bv, cur_font, NULL, NULL, line, -1);
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}
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}
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GtkWidget *
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add_item_to_tree(GtkWidget *tree, gint start, gint len,
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gchar *format, ...) {
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GtkWidget *ti;
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va_list ap;
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gchar label_str[256];
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va_start(ap, format);
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vsnprintf(label_str, 256, format, ap);
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ti = gtk_tree_item_new_with_label(label_str);
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1998-10-12 01:40:57 +00:00
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gtk_object_set_data(GTK_OBJECT(ti), E_TREEINFO_START_KEY, (gpointer) start);
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gtk_object_set_data(GTK_OBJECT(ti), E_TREEINFO_LEN_KEY, (gpointer) len);
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1998-09-16 02:39:15 +00:00
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gtk_tree_append(GTK_TREE(tree), ti);
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gtk_widget_show(ti);
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return ti;
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}
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void
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add_subtree(GtkWidget *ti, GtkWidget *subtree, gint idx) {
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static gint tree_type[NUM_TREE_TYPES];
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gtk_tree_item_set_subtree(GTK_TREE_ITEM(ti), subtree);
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if (tree_type[idx])
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gtk_tree_item_expand(GTK_TREE_ITEM(ti));
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gtk_signal_connect(GTK_OBJECT(ti), "expand", (GtkSignalFunc) expand_tree,
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(gpointer) &tree_type[idx]);
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gtk_signal_connect(GTK_OBJECT(ti), "collapse", (GtkSignalFunc) collapse_tree,
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(gpointer) &tree_type[idx]);
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}
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void
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expand_tree(GtkWidget *w, gpointer data) {
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gint *val = (gint *) data;
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*val = 1;
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}
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void
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collapse_tree(GtkWidget *w, gpointer data) {
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gint *val = (gint *) data;
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*val = 0;
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}
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1998-10-10 03:32:20 +00:00
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/* Tries to match val against each element in the value_string array vs.
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1998-10-20 05:31:03 +00:00
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Returns the associated string ptr on a match.
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Formats val with fmt, and returns the resulting string, on failure. */
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gchar*
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1998-10-28 01:16:49 +00:00
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val_to_str(guint32 val, const value_string *vs, const char *fmt) {
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1998-10-20 05:31:03 +00:00
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gchar *ret;
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static gchar str[3][64];
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static gchar *cur;
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ret = match_strval(val, vs);
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if (ret != NULL)
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return ret;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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snprintf(cur, 64, fmt, val);
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return cur;
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}
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/* Tries to match val against each element in the value_string array vs.
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Returns the associated string ptr on a match, or NULL on failure. */
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1998-10-10 03:32:20 +00:00
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gchar*
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1998-10-28 01:16:49 +00:00
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match_strval(guint32 val, const value_string *vs) {
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1998-10-16 01:18:35 +00:00
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gint i = 0;
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1998-10-10 03:32:20 +00:00
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1998-10-16 01:18:35 +00:00
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while (vs[i].strptr) {
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1998-10-10 03:32:20 +00:00
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if (vs[i].value == val)
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return(vs[i].strptr);
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1998-10-16 01:18:35 +00:00
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i++;
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1998-10-10 03:32:20 +00:00
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}
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return(NULL);
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}
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1998-11-17 04:29:13 +00:00
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/* Checks to see if a particular packet information element is needed for
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the packet list */
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gint
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check_col(frame_data *fd, gint el) {
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int i;
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if (fd->cinfo) {
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for (i = 0; i < fd->cinfo->num_cols; i++) {
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if (fd->cinfo->fmt_matx[i][el])
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return TRUE;
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}
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}
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return FALSE;
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}
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/* To do: Add check_col checks to the pinfo_add* routines */
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/* Adds a vararg list to a packet info string. */
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void
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col_add_fstr(frame_data *fd, gint el, gchar *format, ...) {
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va_list ap;
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int i;
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va_start(ap, format);
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for (i = 0; i < fd->cinfo->num_cols; i++) {
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if (fd->cinfo->fmt_matx[i][el])
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vsnprintf(fd->cinfo->col_data[i], COL_MAX_LEN, format, ap);
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}
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}
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void
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col_add_str(frame_data *fd, gint el, gchar* str) {
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int i;
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for (i = 0; i < fd->cinfo->num_cols; i++) {
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if (fd->cinfo->fmt_matx[i][el]) {
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strncpy(fd->cinfo->col_data[i], str, COL_MAX_LEN);
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fd->cinfo->col_data[i][COL_MAX_LEN - 1] = 0;
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}
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}
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}
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1998-09-27 22:12:47 +00:00
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static const char *mon_names[12] = {
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"Jan",
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"Feb",
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"Mar",
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"Apr",
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"May",
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"Jun",
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"Jul",
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"Aug",
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"Sep",
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"Oct",
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"Nov",
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"Dec"
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};
|
1998-09-16 02:39:15 +00:00
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/* this routine checks the frame type from the cf structure */
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void
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1998-09-27 22:12:47 +00:00
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dissect_packet(const u_char *pd, guint32 ts_secs, guint32 ts_usecs,
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frame_data *fd, GtkTree *tree)
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{
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GtkWidget *fh_tree, *ti;
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struct tm *tmp;
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time_t then;
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/* Put in frame header information. */
|
1998-11-17 04:29:13 +00:00
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if (check_col(fd, COL_ABS_TIME)) {
|
1998-09-27 22:12:47 +00:00
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if (timestamp_type == ABSOLUTE) {
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then = fd->secs;
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tmp = localtime(&then);
|
1998-11-17 04:29:13 +00:00
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col_add_fstr(fd, COL_ABS_TIME, "%02d:%02d:%02d.%04ld",
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1998-09-27 22:12:47 +00:00
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tmp->tm_hour,
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tmp->tm_min,
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tmp->tm_sec,
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(long)fd->usecs/100);
|
1998-11-17 04:29:13 +00:00
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}
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}
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if (check_col(fd, COL_REL_TIME)) {
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col_add_fstr(fd, COL_REL_TIME, "%d.%06d", ts_secs, ts_usecs);
|
1998-09-27 22:12:47 +00:00
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}
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if (tree) {
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ti = add_item_to_tree(GTK_WIDGET(tree), 0, fd->cap_len,
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|
"Frame (%d on wire, %d captured)",
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fd->pkt_len, fd->cap_len);
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fh_tree = gtk_tree_new();
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add_subtree(ti, fh_tree, ETT_FRAME);
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|
then = fd->secs;
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|
|
tmp = localtime(&then);
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|
add_item_to_tree(fh_tree, 0, 0,
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|
|
"Frame arrived on %s %2d, %d %02d:%02d:%02d.%04ld",
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|
|
mon_names[tmp->tm_mon],
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|
tmp->tm_mday,
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tmp->tm_year + 1900,
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tmp->tm_hour,
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tmp->tm_min,
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tmp->tm_sec,
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|
|
(long)fd->usecs/100);
|
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|
add_item_to_tree(fh_tree, 0, 0, "Total frame length: %d bytes",
|
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|
|
fd->pkt_len);
|
|
|
|
add_item_to_tree(fh_tree, 0, 0, "Capture frame length: %d bytes",
|
|
|
|
fd->cap_len);
|
|
|
|
}
|
1998-09-16 02:39:15 +00:00
|
|
|
|
1998-11-12 00:06:47 +00:00
|
|
|
#ifdef WITH_WIRETAP
|
|
|
|
switch (cf.lnk_t) {
|
|
|
|
case WTAP_ENCAP_ETHERNET :
|
|
|
|
dissect_eth(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case WTAP_ENCAP_FDDI :
|
|
|
|
dissect_fddi(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case WTAP_ENCAP_TR :
|
|
|
|
dissect_tr(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case WTAP_ENCAP_NONE :
|
|
|
|
dissect_null(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case WTAP_ENCAP_PPP :
|
|
|
|
dissect_ppp(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case WTAP_ENCAP_RAW_IP :
|
|
|
|
dissect_raw(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
#else
|
1998-09-16 02:39:15 +00:00
|
|
|
switch (cf.lnk_t) {
|
|
|
|
case DLT_EN10MB :
|
|
|
|
dissect_eth(pd, fd, tree);
|
|
|
|
break;
|
1998-10-10 03:32:20 +00:00
|
|
|
case DLT_FDDI :
|
|
|
|
dissect_fddi(pd, fd, tree);
|
|
|
|
break;
|
1998-09-16 02:39:15 +00:00
|
|
|
case DLT_IEEE802 :
|
|
|
|
dissect_tr(pd, fd, tree);
|
|
|
|
break;
|
1998-09-25 23:24:07 +00:00
|
|
|
case DLT_NULL :
|
|
|
|
dissect_null(pd, fd, tree);
|
|
|
|
break;
|
|
|
|
case DLT_PPP :
|
|
|
|
dissect_ppp(pd, fd, tree);
|
|
|
|
break;
|
1998-09-16 02:39:15 +00:00
|
|
|
case DLT_RAW :
|
1998-09-27 22:12:47 +00:00
|
|
|
dissect_raw(pd, fd, tree);
|
1998-09-16 02:39:15 +00:00
|
|
|
break;
|
|
|
|
}
|
1998-11-12 00:06:47 +00:00
|
|
|
#endif
|
1998-09-16 02:39:15 +00:00
|
|
|
}
|