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wireshark/packet-nbipx.c

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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 1.16 1999/11/30 07:45:41 guy 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 <glib.h>
#include "packet.h"
#include "packet-ipx.h" /* for ipxnet_to_string() */
#include "packet-netbios.h"
static int proto_nbipx = -1;
static gint ett_nbipx = -1;
static gint ett_nbipx_name_type_flags = -1;
enum nbipx_protocol {
NETBIOS_NETWARE,
NETBIOS_NWLINK
};
static void
dissect_nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int max_data);
static void
dissect_nbipx_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
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)
*
* A list of "NovelNetBIOS" packet types can be found at
*
* http://www.protocols.com/pbook/novel.htm#NetBIOS
*
* and at least some of those packet types appear to match what's in
* some NBIPX packets.
*
* Note, however, that the offset of the packet type in an NBIPX packet
* *DEPENDS ON THE PACKET TYPE*; "Find name" and "Name recognized" have
* it at one offset, "Directed datagram" has it at another. Does the
* NBIPX code base it on the length, or what? Non-broadcast directed
* datagram packets have an IPX type of "IPX", just as "Find name" and
* "Name recognized" do.... For now, we base it on the length.
*/
#define NBIPX_FIND_NAME 1
#define NBIPX_NAME_RECOGNIZED 2
#define NBIPX_CHECK_NAME 3
#define NBIPX_NAME_IN_USE 4
#define NBIPX_DEREGISTER_NAME 5
#define NBIPX_SESSION_DATA 6
#define NBIPX_SESSION_END 7
#define NBIPX_SESSION_END_ACK 8
#define NBIPX_STATUS_QUERY 9
#define NBIPX_STATUS_RESPONSE 10
#define NBIPX_DIRECTED_DATAGRAM 11
static const value_string nbipx_data_stream_type_vals[] = {
{NBIPX_FIND_NAME, "Find name"},
{NBIPX_NAME_RECOGNIZED, "Name recognized"},
{NBIPX_CHECK_NAME, "Check name"},
{NBIPX_NAME_IN_USE, "Name in use"},
{NBIPX_DEREGISTER_NAME, "Deregister name"},
{NBIPX_SESSION_DATA, "Session data"},
{NBIPX_SESSION_END, "Session end"},
{NBIPX_SESSION_END_ACK, "Session end ACK"},
{NBIPX_STATUS_QUERY, "Status query"},
{NBIPX_STATUS_RESPONSE, "Status response"},
{NBIPX_DIRECTED_DATAGRAM, "Directed datagram"},
{0, NULL}
};
#define NWLINK_NAME_QUERY 1
#define NWLINK_SMB 2
#define NWLINK_NETBIOS_DATAGRAM 3
static const value_string nwlink_data_stream_type_vals[] = {
{NWLINK_NAME_QUERY, "Name query"},
{NWLINK_SMB, "SMB"},
{NWLINK_NETBIOS_DATAGRAM, "NetBIOS datagram"},
{0, NULL}
};
/* NetWare */
void
dissect_nbipx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
{
int max_data = pi.captured_len - offset;
if (check_col(fd, COL_PROTOCOL))
col_add_str(fd, COL_PROTOCOL, "NBIPX");
/*
* As said above, we look at the length of the packet to decide
* whether to treat it as a name-service packet or a datagram
* (the packet type would tell us, but it's at a *DIFFERENT
* LOCATION* in different types of packet...).
*/
if (END_OF_FRAME == 50)
dissect_nbipx_ns(pd, offset, fd, tree, max_data);
else
dissect_nbipx_dg(pd, offset, fd, tree, max_data);
}
static void
add_routers(proto_tree *tree, const u_char *pd, int offset)
{
int i;
int rtr_offset;
guint32 router;
/* Eight routers are listed */
for (i = 0; i < 8; i++) {
rtr_offset = offset + (i << 2);
memcpy(&router, &pd[rtr_offset], 4);
if (router != 0) {
proto_tree_add_text(tree, rtr_offset, 4, "IPX Network: %s",
ipxnet_to_string((guint8*)&router));
}
}
}
static void
dissect_nbipx_ns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int max_data)
{
proto_tree *nbipx_tree;
proto_item *ti;
guint8 packet_type;
guint8 name_type_flag;
proto_tree *name_type_flag_tree;
proto_item *tf;
char name[(NETBIOS_NAME_LEN - 1)*4 + 1];
int name_type;
name_type_flag = pd[offset+32];
packet_type = pd[offset+33];
name_type = get_netbios_name(pd, offset+34, name);
if (check_col(fd, COL_INFO)) {
switch (packet_type) {
case NBIPX_FIND_NAME:
case NBIPX_NAME_RECOGNIZED:
case NBIPX_CHECK_NAME:
case NBIPX_NAME_IN_USE:
case NBIPX_DEREGISTER_NAME:
col_add_fstr(fd, COL_INFO, "%s %s<%02x>",
val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"),
name, name_type);
break;
default:
col_add_fstr(fd, COL_INFO, "%s",
val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"));
break;
}
}
if (tree) {
ti = proto_tree_add_item(tree, proto_nbipx, offset, 50, NULL);
nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
add_routers(nbipx_tree, pd, offset);
tf = proto_tree_add_text(nbipx_tree, offset+32, 1,
"Name type flag: 0x%02x", name_type_flag);
name_type_flag_tree = proto_item_add_subtree(tf,
ett_nbipx_name_type_flags);
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x80, 8,
"Group name", "Unique name"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x40, 8,
"Name in use", "Name not used"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x04, 8,
"Name registered", "Name not registered"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x02, 8,
"Name duplicated", "Name not duplicated"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x01, 8,
"Name deregistered", "Name not deregistered"));
proto_tree_add_text(nbipx_tree, offset+33, 1,
"Packet Type: %s (%02X)",
val_to_str(packet_type, nbipx_data_stream_type_vals, "Unknown"),
packet_type);
netbios_add_name("Name", pd, offset + 34,
nbipx_tree);
}
}
static void
dissect_nbipx_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int max_data)
{
proto_tree *nbipx_tree;
proto_item *ti;
if (check_col(fd, COL_INFO))
col_add_fstr(fd, COL_INFO, "NetBIOS datagram over NBIPX");
if (tree) {
ti = proto_tree_add_item(tree, proto_nbipx, offset,
2+NETBIOS_NAME_LEN+NETBIOS_NAME_LEN, NULL);
nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
proto_tree_add_text(nbipx_tree, offset, 1,
"Connection control: 0x%02x", pd[offset]);
offset += 1;
max_data -= 1;
if (!BYTES_ARE_IN_FRAME(offset, 1))
return;
proto_tree_add_text(nbipx_tree, offset, 1,
"Packet Type: %s (%02X)",
val_to_str(pd[offset], nbipx_data_stream_type_vals, "Unknown"),
pd[offset]);
offset += 1;
max_data -= 1;
if (!netbios_add_name("Receiver's Name", pd, offset,
nbipx_tree))
return;
offset += NETBIOS_NAME_LEN;
max_data -= NETBIOS_NAME_LEN;
if (!netbios_add_name("Sender's Name", pd, offset,
nbipx_tree))
return;
offset += NETBIOS_NAME_LEN;
max_data -= NETBIOS_NAME_LEN;
if (max_data != 0)
dissect_smb(pd, offset, fd, tree, max_data);
}
}
void
dissect_nwlink_dg(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
{
int max_data = pi.captured_len - offset;
proto_tree *nbipx_tree;
proto_item *ti;
guint8 packet_type;
guint8 name_type_flag;
proto_tree *name_type_flag_tree;
proto_item *tf;
char name[(NETBIOS_NAME_LEN - 1)*4 + 1];
int name_type;
char node_name[(NETBIOS_NAME_LEN - 1)*4 + 1];
int node_name_type = 0;
name_type_flag = pd[offset+32];
packet_type = pd[offset+33];
name_type = get_netbios_name(pd, offset+36, name);
node_name_type = get_netbios_name(pd, offset+52, node_name);
if (check_col(fd, COL_PROTOCOL))
col_add_str(fd, COL_PROTOCOL, "NWLink");
if (check_col(fd, COL_INFO)) {
/*
* XXX - Microsoft Network Monitor thinks that the octet
* at 32 is a packet type, e.g. "mailslot write" for
* browser announcements, and that the octet at 33 is a
* name type, in the sense of the 16th byte of a
* NetBIOS name.
*
* A name type of 2 shows up in a "host announcement",
* and a name type of 3 shows up in a "local master
* annoumcement", so maybe that field really *is* a
* name type - the fact that it's not associated with
* any of the NetBIOS names in the packet nonwithstanding.
*
* I haven't seen any packets with the name type octet
* being anything other than 2 or 3, so I don't know
* whether those are name service operations; however,
* given that NWLink, unlike socket-0x0455 NBIPX,
* has separate sockets for name queries and datagrams,
* it may be that this really is a name type, and that
* these are all datagrams, not name queries.
*/
switch (packet_type) {
case NWLINK_NAME_QUERY:
col_add_fstr(fd, COL_INFO, "Name Query for %s<%02x>",
name, name_type);
break;
case NWLINK_SMB:
/* Session? */
col_add_fstr(fd, COL_INFO, "SMB over NBIPX");
break;
case NWLINK_NETBIOS_DATAGRAM:
/* Datagram? (Where did we see this?) */
col_add_fstr(fd, COL_INFO, "NetBIOS datagram over NBIPX");
break;
default:
col_add_str(fd, COL_INFO, "NetBIOS over IPX (NWLink)");
break;
}
}
if (tree) {
ti = proto_tree_add_item(tree, proto_nbipx, offset, 68, NULL);
nbipx_tree = proto_item_add_subtree(ti, ett_nbipx);
add_routers(nbipx_tree, pd, offset);
/*
* XXX - is "packet_type" really a packet type? See
* above.
*/
if (packet_type != NWLINK_SMB &&
packet_type != NWLINK_NETBIOS_DATAGRAM) {
tf = proto_tree_add_text(nbipx_tree, offset+32, 1,
"Name type flag: 0x%02x",
name_type_flag);
name_type_flag_tree = proto_item_add_subtree(tf,
ett_nbipx_name_type_flags);
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x80, 8,
"Group name", "Unique name"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x40, 8,
"Name in use", "Name not used"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x04, 8,
"Name registered", "Name not registered"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x02, 8,
"Name duplicated", "Name not duplicated"));
proto_tree_add_text(name_type_flag_tree, offset+32,
1, "%s",
decode_boolean_bitfield(name_type_flag, 0x01, 8,
"Name deregistered", "Name not deregistered"));
if (!netbios_add_name("Group name", pd, offset+36,
nbipx_tree))
return;
if (!netbios_add_name("Node name", pd, offset+52,
nbipx_tree))
return;
proto_tree_add_text(nbipx_tree, offset+33, 1,
"Packet Type: %s (%02X)",
val_to_str(packet_type, nwlink_data_stream_type_vals, "Unknown"),
packet_type);
} else {
proto_tree_add_text(nbipx_tree, offset+32, 1,
"Packet type: 0x%02x", name_type_flag);
proto_tree_add_text(nbipx_tree, offset+33, 1,
"Name Type: %s (0x%02x)",
netbios_name_type_descr(packet_type),
packet_type);
proto_tree_add_text(nbipx_tree, offset+34, 2,
"Message ID: 0x%04x", pletohs(&pd[offset+34]));
if (!netbios_add_name("Requested name", pd, offset+36,
nbipx_tree))
return;
if (!netbios_add_name("Source name", pd, offset+52,
nbipx_tree))
return;
}
}
offset += 68;
max_data -= 68;
if (max_data != 0) {
switch (packet_type) {
case NWLINK_SMB:
case NWLINK_NETBIOS_DATAGRAM:
dissect_smb(pd, offset, fd, tree, max_data);
break;
default:
dissect_data(pd, offset, fd, tree);
break;
}
}
}
void
proto_register_nbipx(void)
{
/* static hf_register_info hf[] = {
{ &variable,
{ "Name", "nbipx.abbreviation", TYPE, VALS_POINTER }},
};*/
static gint *ett[] = {
&ett_nbipx,
&ett_nbipx_name_type_flags,
};
proto_nbipx = proto_register_protocol("NetBIOS over IPX", "nbipx");
/* proto_register_field_array(proto_nbipx, hf, array_length(hf));*/
proto_register_subtree_array(ett, array_length(ett));
}
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