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/* packet-ppp.c
* Routines for ppp packet disassembly
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
*
* This file created and by Mike Hall <mlh@io.com>
* Copyright 1998
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gtk/gtk.h>
#include <stdio.h>
#include <pcap.h>
#include "packet.h"
#include "ethereal.h"
void
dissect_ppp( const u_char *pd, frame_data *fd, GtkTree *tree ) {
e_ppphdr ph;
GtkWidget *ti, *fh_tree;
guchar flag, addr, control;
guint protocol;
ph.ppp_flag = pd[0];
ph.ppp_addr = pd[1];
ph.ppp_ctl = pd[2];
ph.ppp_prot = pntohs(&pd[3]);
/* load the top pane info. This should be overwritten by
the next protocol in the stack */
if(fd->win_info[0]) {
strcpy(fd->win_info[1], "N/A" );
strcpy(fd->win_info[2], "N/A" );
strcpy(fd->win_info[4], "PPP" );
}
/* populate a tree in the second pane with the status of the link
layer (ie none) */
if(tree) {
ti = add_item_to_tree( GTK_WIDGET(tree), 0, 5,
"Point-to-Point Protocol (%d on link, %d captured)", fd->pkt_len,
fd->cap_len );
fh_tree = gtk_tree_new();
add_subtree(ti, fh_tree, ETT_PPP);
add_item_to_tree(fh_tree, 0, 1, "Flag: %02x", ph.ppp_flag);
add_item_to_tree(fh_tree, 1, 1, "Address: %02x", ph.ppp_addr);
add_item_to_tree(fh_tree, 2, 1, "Control: %02x", ph.ppp_ctl);
add_item_to_tree(fh_tree, 3, 2, "Protocol: %04x", ph.ppp_prot);
}
switch (ph.ppp_prot) {
case 0x0021:
dissect_ip(pd, 5, fd, tree);
break;
default:
dissect_data(pd, 5, fd, tree);
break;
}
}
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