131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/* packet-raw.c
|
|
* Routines for raw packet disassembly
|
|
*
|
|
* $Id: packet-raw.c,v 1.17 2000/05/25 07:42:25 gram Exp $
|
|
*
|
|
* 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
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include "packet.h"
|
|
#include "packet-raw.h"
|
|
#include "packet-ip.h"
|
|
#include "packet-ppp.h"
|
|
|
|
static gint ett_raw = -1;
|
|
|
|
void
|
|
capture_raw( const u_char *pd, packet_counts *ld ) {
|
|
|
|
/* So far, the only time we get raw connection types are with Linux and
|
|
* Irix PPP connections. We can't tell what type of data is coming down
|
|
* the line, so our safest bet is IP. - GCC
|
|
*/
|
|
|
|
/* Currently, the Linux 2.1.xxx PPP driver passes back some of the header
|
|
* sometimes. This check should be removed when 2.2 is out.
|
|
*/
|
|
if (BYTES_ARE_IN_FRAME(0,2) && pd[0] == 0xff && pd[1] == 0x03) {
|
|
capture_ppp(pd, 0, ld);
|
|
}
|
|
/* The Linux ISDN driver sends a fake MAC address before the PPP header
|
|
* on its ippp interfaces. */
|
|
else if (BYTES_ARE_IN_FRAME(0,8) && pd[6] == 0xff && pd[7] == 0x03) {
|
|
capture_ppp(pd, 6, ld);
|
|
}
|
|
else {
|
|
capture_ip(pd, 0, ld);
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_raw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *fh_tree;
|
|
proto_item *ti;
|
|
tvbuff_t *next_tvb;
|
|
const guint8 *next_pd;
|
|
int next_offset;
|
|
|
|
/* load the top pane info. This should be overwritten by
|
|
the next protocol in the stack */
|
|
if(check_col(pinfo->fd, COL_RES_DL_SRC))
|
|
col_add_str(pinfo->fd, COL_RES_DL_SRC, "N/A" );
|
|
if(check_col(pinfo->fd, COL_RES_DL_DST))
|
|
col_add_str(pinfo->fd, COL_RES_DL_DST, "N/A" );
|
|
if(check_col(pinfo->fd, COL_PROTOCOL))
|
|
col_add_str(pinfo->fd, COL_PROTOCOL, "N/A" );
|
|
if(check_col(pinfo->fd, COL_INFO))
|
|
col_add_str(pinfo->fd, COL_INFO, "Raw packet data" );
|
|
|
|
/* populate a tree in the second pane with the status of the link
|
|
layer (ie none) */
|
|
if (tree) {
|
|
ti = proto_tree_add_text(tree, tvb, 0, 0, "Raw packet data" );
|
|
fh_tree = proto_item_add_subtree(ti, ett_raw);
|
|
proto_tree_add_text(fh_tree, tvb, 0, 0, "No link information available");
|
|
}
|
|
|
|
/* So far, the only time we get raw connection types are with Linux and
|
|
* Irix PPP connections. We can't tell what type of data is coming down
|
|
* the line, so our safest bet is IP. - GCC
|
|
*/
|
|
|
|
/* Currently, the Linux 2.1.xxx PPP driver passes back some of the header
|
|
* sometimes. This check should be removed when 2.2 is out.
|
|
*/
|
|
if (tvb_get_ntohs(tvb, 0) == 0xff03) {
|
|
dissect_ppp(tvb, pinfo, tree);
|
|
return;
|
|
}
|
|
/* The Linux ISDN driver sends a fake MAC address before the PPP header
|
|
* on its ippp interfaces. */
|
|
else if (tvb_get_ntohs(tvb, 6) == 0xff03) {
|
|
next_tvb = tvb_new_subset(tvb, 6, -1, -1);
|
|
dissect_ppp(next_tvb, pinfo, tree);
|
|
return;
|
|
}
|
|
else {
|
|
tvb_compat(tvb, &next_pd, &next_offset);
|
|
dissect_ip(next_pd, next_offset, pinfo->fd, tree);
|
|
return;
|
|
}
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
void
|
|
proto_register_raw(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_raw,
|
|
};
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|