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/* packet-tns.c
* Routines for MSX tns packet dissection
*
* $Id: packet-tns.c,v 1.1 1999/11/29 19:43:26 nneul Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* Copyright 1998 Gerald Combs
*
* Copied from packet-tftp.c
*
* 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>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <string.h>
#include <glib.h>
#include "packet.h"
#include "packet-tns.h"
static int proto_tns = -1;
static int hf_tns_request = -1;
static int hf_tns_response = -1;
static int hf_tns_length = -1;
static int hf_tns_packet_checksum = -1;
static int hf_tns_header_checksum = -1;
static int hf_tns_packet_type = -1;
static int hf_tns_reserved_byte = -1;
static gint ett_tns = -1;
static const value_string tns_type_vals[] = {
{TNS_TYPE_CONNECT, "Connect" },
{TNS_TYPE_ACCEPT, "Accept" },
{TNS_TYPE_DATA, "Data" },
{TNS_TYPE_RESEND, "Resend"},
{0, NULL}
};
/* Handy macro for checking for truncated packet */
#define TRUNC(length) if ( ! BYTES_ARE_IN_FRAME(offset, length)) { \
dissect_data(pd,offset,fd,tree); return; }
void dissect_tns_data(const u_char *pd, int offset, frame_data *fd,
proto_tree *tree)
{
dissect_data(pd,offset,fd,tree);
return;
}
void dissect_tns_connect(const u_char *pd, int offset, frame_data *fd,
proto_tree *tree)
{
dissect_data(pd,offset,fd,tree);
return;
}
void dissect_tns_accept(const u_char *pd, int offset, frame_data *fd,
proto_tree *tree)
{
dissect_data(pd,offset,fd,tree);
return;
}
void
dissect_tns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
{
proto_tree *tns_tree, *ti;
guint16 length;
guint16 type;
if (check_col(fd, COL_PROTOCOL))
col_add_str(fd, COL_PROTOCOL, "TNS");
if (check_col(fd, COL_INFO))
{
col_add_fstr(fd, COL_INFO, "%s",
(pi.match_port == pi.destport) ? "Request" : "Response");
}
if (tree)
{
ti = proto_tree_add_item(tree, proto_tns, offset, END_OF_FRAME, NULL);
tns_tree = proto_item_add_subtree(ti, ett_tns);
if (pi.match_port == pi.destport)
{
proto_tree_add_item_hidden(tns_tree, hf_tns_request,
offset, END_OF_FRAME, TRUE);
proto_tree_add_text(tns_tree, offset,
END_OF_FRAME, "Request: <opaque data>" );
}
else
{
proto_tree_add_item_hidden(tns_tree, hf_tns_response,
offset, END_OF_FRAME, TRUE);
proto_tree_add_text(tns_tree, offset,
END_OF_FRAME, "Response: <opaque data>");
}
}
/* check to make sure length is present */
if ( ! BYTES_ARE_IN_FRAME(offset, 2)) return;
length = pntohs(&pd[offset]);
if (tree)
{
proto_tree_add_item(tns_tree, hf_tns_length,
offset, 2, length);
}
TRUNC(length);
offset += 2;
TRUNC(2);
if ( tree )
{
proto_tree_add_item(tns_tree, hf_tns_packet_checksum,
offset, 2, pntohs(&pd[offset]));
}
offset += 2;
TRUNC(2);
type = pd[offset];
if ( tree )
{
proto_tree_add_item(tns_tree, hf_tns_packet_type,
offset, 1, type);
}
offset += 1;
if ( check_col(fd, COL_INFO))
{
col_append_fstr(fd, COL_INFO, ", %s (%d)",
val_to_str(type, tns_type_vals, "Unknown"), type);
}
TRUNC(1);
if ( tree )
{
proto_tree_add_item(tns_tree, hf_tns_reserved_byte,
offset, 1, &pd[offset]);
}
offset += 1;
TRUNC(2);
if ( tree )
{
proto_tree_add_item(tns_tree, hf_tns_header_checksum,
offset, 2, pntohs(&pd[offset]));
}
offset += 2;
switch (type)
{
case TNS_TYPE_CONNECT:
dissect_tns_connect(pd,offset,fd,tree);
break;
case TNS_TYPE_ACCEPT:
dissect_tns_accept(pd,offset,fd,tree);
break;
case TNS_TYPE_DATA:
dissect_tns_data(pd,offset,fd,tree);
break;
default:
dissect_data(pd,offset,fd,tree);
}
}
void proto_register_tns(void)
{
static hf_register_info hf[] = {
{ &hf_tns_response, {
"Response", "tns.response", FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "TRUE if TNS response" }},
{ &hf_tns_request, {
"Request", "tns.request", FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "TRUE if TNS request" }},
{ &hf_tns_length, {
"Packet Length", "tns.length", FT_UINT32, BASE_NONE,
NULL, 0x0, "Length of TNS packet" }},
{ &hf_tns_packet_checksum, {
"Packet Checksum", "tns.packet_checksum", FT_UINT16, BASE_HEX,
NULL, 0x0, "Checksum of Packet Data" }},
{ &hf_tns_header_checksum, {
"Header Checksum", "tns.header_checksum", FT_UINT16, BASE_HEX,
NULL, 0x0, "Checksum of Header Data" }},
{ &hf_tns_reserved_byte, {
"Reserved Byte", "tns.reserved_byte", FT_BYTES, BASE_HEX,
NULL, 0x0, "Reserved Byte" }},
{ &hf_tns_packet_type, {
"Packet Type", "tns.type", FT_UINT8, BASE_NONE,
VALS(tns_type_vals), 0x0, "Type of TNS packet" }}
};
static gint *ett[] = {
&ett_tns,
};
proto_tns = proto_register_protocol(
"Transparent Network Substrate Protocol", "tns");
proto_register_field_array(proto_tns, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
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