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/* packet-xot.c
* Routines for X25 over TCP dissection (RFC 1613)
*
* Copyright 2000, Paul Ionescu <paul@acorp.ro>
*
* $Id: packet-xot.c,v 1.8 2001/12/10 00:25:41 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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 <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <glib.h>
#include "packet.h"
#define TCP_PORT_XOT 1998
static gint proto_xot = -1;
static gint hf_xot_version = -1;
static gint hf_xot_length = -1;
static gint ett_xot = -1;
static dissector_handle_t x25_handle;
static void dissect_xot(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *xot_tree;
guint16 version,len;
tvbuff_t *next_tvb;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "XOT");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
version = tvb_get_ntohs(tvb,0);
len = tvb_get_ntohs(tvb,2);
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "XOT Version = %u, size = %u",version,len );
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_xot, tvb, 0, 4, "X.25 over TCP");
xot_tree = proto_item_add_subtree(ti, ett_xot);
proto_tree_add_uint(xot_tree, hf_xot_version, tvb, 0, 2, version);
proto_tree_add_uint(xot_tree, hf_xot_length, tvb, 2, 2, len);
}
next_tvb = tvb_new_subset(tvb,4, -1 , -1);
call_dissector(x25_handle,next_tvb,pinfo,tree);
}
/* Register the protocol with Ethereal */
void
proto_register_xot(void)
{
static hf_register_info hf[] = {
{ &hf_xot_version,
{ "Version", "xot.version", FT_UINT16, BASE_DEC,
NULL, 0, "Version of X.25 over TCP protocol", HFILL }},
{ &hf_xot_length,
{ "Length", "xot.length", FT_UINT16, BASE_DEC,
NULL, 0, "Length of X.25 over TCP packet", HFILL }}
};
static gint *ett[] = {
&ett_xot,
};
proto_xot = proto_register_protocol("X.25 over TCP", "XOT", "xot");
proto_register_field_array(proto_xot, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
};
void
proto_reg_handoff_xot(void)
{
dissector_handle_t xot_handle;
/*
* Get a handle for the X.25 dissector.
*/
x25_handle = find_dissector("x.25");
xot_handle = create_dissector_handle(dissect_xot, proto_xot);
dissector_add("tcp.port", TCP_PORT_XOT, xot_handle);
}
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