2 * Routines for X25 over TCP dissection (RFC 1613)
4 * Copyright 2000, Paul Ionescu <paul@acorp.ro>
6 * $Id: packet-xot.c,v 1.9 2002/01/21 07:36:48 guy Exp $
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@ethereal.com>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
37 #include <epan/packet.h>
39 #define TCP_PORT_XOT 1998
41 static gint proto_xot = -1;
42 static gint hf_xot_version = -1;
43 static gint hf_xot_length = -1;
45 static gint ett_xot = -1;
47 static dissector_handle_t x25_handle;
49 static void dissect_xot(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
56 if (check_col(pinfo->cinfo, COL_PROTOCOL))
57 col_set_str(pinfo->cinfo, COL_PROTOCOL, "XOT");
58 if (check_col(pinfo->cinfo, COL_INFO))
59 col_clear(pinfo->cinfo, COL_INFO);
61 version = tvb_get_ntohs(tvb,0);
62 len = tvb_get_ntohs(tvb,2);
64 if (check_col(pinfo->cinfo, COL_INFO))
65 col_add_fstr(pinfo->cinfo, COL_INFO, "XOT Version = %u, size = %u",version,len );
69 ti = proto_tree_add_protocol_format(tree, proto_xot, tvb, 0, 4, "X.25 over TCP");
70 xot_tree = proto_item_add_subtree(ti, ett_xot);
72 proto_tree_add_uint(xot_tree, hf_xot_version, tvb, 0, 2, version);
73 proto_tree_add_uint(xot_tree, hf_xot_length, tvb, 2, 2, len);
76 next_tvb = tvb_new_subset(tvb,4, -1 , -1);
77 call_dissector(x25_handle,next_tvb,pinfo,tree);
80 /* Register the protocol with Ethereal */
82 proto_register_xot(void)
84 static hf_register_info hf[] = {
86 { "Version", "xot.version", FT_UINT16, BASE_DEC,
87 NULL, 0, "Version of X.25 over TCP protocol", HFILL }},
90 { "Length", "xot.length", FT_UINT16, BASE_DEC,
91 NULL, 0, "Length of X.25 over TCP packet", HFILL }}
95 static gint *ett[] = {
99 proto_xot = proto_register_protocol("X.25 over TCP", "XOT", "xot");
100 proto_register_field_array(proto_xot, hf, array_length(hf));
101 proto_register_subtree_array(ett, array_length(ett));
105 proto_reg_handoff_xot(void)
107 dissector_handle_t xot_handle;
110 * Get a handle for the X.25 dissector.
112 x25_handle = find_dissector("x.25");
114 xot_handle = create_dissector_handle(dissect_xot, proto_xot);
115 dissector_add("tcp.port", TCP_PORT_XOT, xot_handle);