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/* packet-nbipx.c
* Routines for NetBIOS over IPX packet disassembly
* Gilbert Ramirez <gram@verdict.uthscsa.edu>
*
* $Id: packet-nbipx.c,v 1.7 1999/05/10 19:01:32 gram Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* 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
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
/*#include <memory.h>*/
#include <glib.h>
#include "packet.h"
#include "packet-ipx.h" /* for ipxnet_to_string() */
enum nbipx_protocol {
NETBIOS_NETWARE,
NETBIOS_NWLINK
};
static void
nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
enum nbipx_protocol nbipx, int max_data);
/* There is no RFC or public specification of Netware or Microsoft
* NetBIOS over IPX packets. I have had to decode the protocol myself,
* so there are holes and perhaps errors in this code. (gram)
*/
static char
*packet_type[] = {
"",
"Name Query"
};
struct nbipx_header {
/* Netware & NT NetBIOS over IPX */
guint32 router[8];
guint8 name_type;
guint8 packet_type;
char name[17];
/* NT NetBIOS over IPX */
guint16 junk;
char node_name[17];
};
/* NetWare */
void
dissect_nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int max_data)
{
nbipx_ns(pd, offset, fd, tree, NETBIOS_NETWARE, max_data);
}
void
dissect_nwlink_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int max_data)
{
nbipx_ns(pd, offset, fd, tree, NETBIOS_NWLINK, max_data);
}
static void
nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
enum nbipx_protocol nbipx, int max_data)
{
proto_tree *nbipx_tree;
proto_item *ti;
struct nbipx_header header;
int i, rtr_offset;
int name_offset;
if (nbipx == NETBIOS_NETWARE) {
name_offset = 34;
}
else {
name_offset = 36;
}
header.name_type = pd[offset+32];
header.packet_type = pd[offset+33];
memcpy(header.name, &pd[offset+name_offset], 16);
header.name[16] = 0; /* null-terminate the string */
if (nbipx == NETBIOS_NWLINK) {
memcpy(header.node_name, &pd[offset+52], 16);
header.node_name[17] = 0; /* null-terminate the string */
}
if (check_col(fd, COL_PROTOCOL)) {
if (nbipx == NETBIOS_NETWARE) {
col_add_str(fd, COL_PROTOCOL, "NetBIOS");
}
else {
col_add_str(fd, COL_PROTOCOL, "NWLink");
}
}
if (check_col(fd, COL_INFO)) {
switch (header.packet_type) {
case 1:
col_add_fstr(fd, COL_INFO, "Name Query for %s", header.name);
break;
case 2:
col_add_fstr(fd, COL_INFO, "SMB over NBIPX");
break;
default:
col_add_str(fd, COL_INFO, "NetBIOS over IPX");
}
}
if (tree) {
ti = proto_tree_add_item(tree, offset, 68,
"NetBIOS over IPX");
nbipx_tree = proto_tree_new();
proto_item_add_subtree(ti, nbipx_tree, ETT_NBIPX);
if (header.packet_type <= 1) {
proto_tree_add_item(nbipx_tree, offset+33, 1,
"Packet Type: %s (%02X)", packet_type[header.packet_type],
header.packet_type);
}
else {
proto_tree_add_item(nbipx_tree, offset+33, 1,
"Packet Type: Unknown (%02X)", header.packet_type);
}
/* Eight routers are listed */
for (i = 0; i < 8; i++) {
rtr_offset = offset + (i << 2);
memcpy(&header.router[i], &pd[rtr_offset], 4);
if (header.router[i] != 0) {
proto_tree_add_item(nbipx_tree, rtr_offset, 4, "IPX Network: %s",
ipxnet_to_string((guint8*)&header.router[i]));
}
}
proto_tree_add_item(nbipx_tree, offset+32, 1, "Name Type: %02X",
header.name_type);
if (nbipx == NETBIOS_NETWARE) {
proto_tree_add_item(nbipx_tree, offset+name_offset, 16,
"Name String: %s", header.name);
}
else {
proto_tree_add_item(nbipx_tree, offset+name_offset, 16,
"Group Name String: %s", header.name);
proto_tree_add_item(nbipx_tree, offset+52, 16,
"Node Name String: %s", header.node_name);
}
}
if (nbipx == NETBIOS_NWLINK) {
switch (header.packet_type) {
case 2:
dissect_smb(pd, offset + 68, fd, tree, max_data - 68);
break;
default:
dissect_data(pd, offset + 68, fd, tree);
break;
}
}
}
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