219 lines
5.6 KiB
C
219 lines
5.6 KiB
C
/* packet.c
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* Routines for packet disassembly
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*
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* $Id: packet.c,v 1.2 1998/09/16 03:22:13 gerald Exp $
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*
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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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#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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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include "packet.h"
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#include "ethereal.h"
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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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guint32 t_info;
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/* This limits us to a max packet size of 65535 bytes. */
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/* Are there any systems out there with < 32-bit pointers? */
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/* To do: use gtk_object_set_data instead, now that I know it exists. */
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t_info = ((start & 0xffff) << 16) | (len & 0xffff);
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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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gtk_object_set_user_data(GTK_OBJECT(ti), (gpointer) t_info);
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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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/* decodes the protocol start and length thare are encoded into
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the t_info field in add_item_to_tree. */
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void
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decode_start_len(GtkTreeItem *ti, gint *pstart, gint *plen)
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{
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guint32 t_info;
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int start, len;
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t_info = (guint32) gtk_object_get_user_data(GTK_OBJECT(ti));
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*pstart = t_info >> 16;
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*plen = t_info & 0xffff;
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}
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/* this routine checks the frame type from the cf structure */
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void
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dissect_packet(const u_char *pd, frame_data *fd, GtkTree *tree) {
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switch (cf.lnk_t) {
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case DLT_EN10MB :
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dissect_eth(pd, fd, tree);
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break;
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case DLT_IEEE802 :
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dissect_tr(pd, fd, tree);
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break;
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case DLT_RAW :
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dissect_raw(pd, fd, tree);
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break;
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}
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}
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