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wireshark/epan/dissectors/packet-netbios.c

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/* packet-netbios.c
* Routines for NetBIOS protocol packet disassembly
* Jeff Foster <jfoste@woodward.com>
* Copyright 1999 Jeffrey C. Foster
*
* derived from the packet-nbns.c
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/capture_dissectors.h>
#include <epan/llcsaps.h>
#include <epan/reassemble.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/capture_dissectors.h>
#include "packet-netbios.h"
void proto_register_netbios(void);
void proto_reg_handoff_netbios(void);
/* Netbios command numbers */
#define NB_ADD_GROUP 0x00
#define NB_ADD_NAME 0x01
#define NB_NAME_IN_CONFLICT 0x02
#define NB_STATUS_QUERY 0x03
#define NB_TERMINATE_TRACE_R 0x07
#define NB_DATAGRAM 0x08
#define NB_DATAGRAM_BCAST 0x09
#define NB_NAME_QUERY 0x0a
#define NB_ADD_NAME_RESP 0x0d
#define NB_NAME_RESP 0x0e
#define NB_STATUS_RESP 0x0f
#define NB_TERMINATE_TRACE_LR 0x13
#define NB_DATA_ACK 0x14
#define NB_DATA_FIRST_MIDDLE 0x15
#define NB_DATA_ONLY_LAST 0x16
#define NB_SESSION_CONFIRM 0x17
#define NB_SESSION_END 0x18
#define NB_SESSION_INIT 0x19
#define NB_NO_RECEIVE 0x1a
#define NB_RECEIVE_OUTSTANDING 0x1b
#define NB_RECEIVE_CONTINUE 0x1c
#define NB_KEEP_ALIVE 0x1f
/* Offsets of fields in the NetBIOS header. */
#define NB_LENGTH 0
#define NB_DELIMITER 2
#define NB_COMMAND 4
#define NB_FLAGS 5
#define NB_DATA1 5
#define NB_RESYNC 6
#define NB_DATA2 6
#define NB_CALL_NAME_TYPE 7
#define NB_XMIT_CORL 8
#define NB_RESP_CORL 10
#define NB_RMT_SES 12
#define NB_LOCAL_SES 13
#define NB_RECVER_NAME 12
#define NB_SENDER_NAME 28
static int proto_netbios = -1;
static int hf_netb_cmd = -1;
static int hf_netb_hdr_len = -1;
static int hf_netb_delimiter = -1;
static int hf_netb_xmit_corrl = -1;
static int hf_netb_resp_corrl = -1;
static int hf_netb_call_name_type = -1;
static int hf_netb_version = -1;
static int hf_netbios_no_receive_flags = -1;
static int hf_netbios_no_receive_flags_send_no_ack = -1;
static int hf_netb_largest_frame = -1;
static int hf_netb_nb_name = -1;
static int hf_netb_nb_name_type = -1;
static int hf_netb_status_buffer_len = -1;
static int hf_netb_status = -1;
static int hf_netb_name_type = -1;
static int hf_netb_max_data_recv_size = -1;
static int hf_netb_termination_indicator = -1;
static int hf_netb_num_data_bytes_accepted = -1;
static int hf_netb_local_ses_no = -1;
static int hf_netb_remote_ses_no = -1;
static int hf_netb_flags = -1;
static int hf_netb_flags_send_no_ack = -1;
static int hf_netb_flags_ack = -1;
static int hf_netb_flags_ack_with_data = -1;
static int hf_netb_flags_ack_expected = -1;
static int hf_netb_flags_recv_cont_req = -1;
static int hf_netb_data2 = -1;
static int hf_netb_data2_frame = -1;
static int hf_netb_data2_user = -1;
static int hf_netb_data2_status = -1;
static int hf_netb_datagram_mac = -1;
static int hf_netb_datagram_bcast_mac = -1;
static int hf_netb_resync_indicator = -1;
static int hf_netb_status_request = -1;
static int hf_netb_local_session_no = -1;
static int hf_netb_state_of_name = -1;
static int hf_netb_status_response = -1;
static int hf_netb_fragments = -1;
static int hf_netb_fragment = -1;
static int hf_netb_fragment_overlap = -1;
static int hf_netb_fragment_overlap_conflict = -1;
static int hf_netb_fragment_multiple_tails = -1;
static int hf_netb_fragment_too_long_fragment = -1;
static int hf_netb_fragment_error = -1;
static int hf_netb_fragment_count = -1;
static int hf_netb_reassembled_length = -1;
static gint ett_netb = -1;
static gint ett_netb_name = -1;
static gint ett_netb_flags = -1;
static gint ett_netb_status = -1;
static gint ett_netb_fragments = -1;
static gint ett_netb_fragment = -1;
static expert_field ei_netb_unknown_command_data = EI_INIT;
static const fragment_items netbios_frag_items = {
&ett_netb_fragment,
&ett_netb_fragments,
&hf_netb_fragments,
&hf_netb_fragment,
&hf_netb_fragment_overlap,
&hf_netb_fragment_overlap_conflict,
&hf_netb_fragment_multiple_tails,
&hf_netb_fragment_too_long_fragment,
&hf_netb_fragment_error,
&hf_netb_fragment_count,
NULL,
&hf_netb_reassembled_length,
/* Reassembled data field */
NULL,
"fragments"
};
/* The strings for the station type, used by get_netbios_name function;
many of them came from the file "NetBIOS.txt" in the Zip archive at
http://www.net3group.com/ftp/browser.zip
*/
static const value_string nb_name_type_vals[] = {
{0x00, "Workstation/Redirector"},
{0x01, "Browser"},
{0x02, "Workstation/Redirector"},
/* not sure what 0x02 is, I'm seeing a lot of them however */
/* I'm seeing them with workstation/redirection host
announcements */
{0x03, "Messenger service/Main name"},
{0x05, "Forwarded name"},
{0x06, "RAS Server service"},
{0x1b, "Domain Master Browser"},
{0x1c, "Domain Controllers"},
{0x1d, "Local Master Browser"},
{0x1e, "Browser Election Service"},
{0x1f, "Net DDE Service"},
{0x20, "Server service"},
{0x21, "RAS client service"},
{0x22, "Exchange Interchange (MSMail Connector)"},
{0x23, "Exchange Store"},
{0x24, "Exchange Directory"},
{0x2b, "Lotus Notes Server service"},
{0x30, "Modem sharing server service"},
{0x31, "Modem sharing client service"},
{0x43, "SMS Clients Remote Control"},
{0x44, "SMS Administrators Remote Control Tool"},
{0x45, "SMS Clients Remote Chat"},
{0x46, "SMS Clients Remote Transfer"},
{0x4c, "DEC Pathworks TCP/IP Service on Windows NT"},
{0x52, "DEC Pathworks TCP/IP Service on Windows NT"},
{0x6a, "Microsoft Exchange IMC"},
{0x87, "Microsoft Exchange MTA"},
{0xbe, "Network Monitor Agent"},
{0xbf, "Network Monitor Analyzer"},
{0x00, NULL}
};
static value_string_ext nb_name_type_vals_ext = VALUE_STRING_EXT_INIT(nb_name_type_vals);
/* Table for reassembly of fragments. */
static reassembly_table netbios_reassembly_table;
/* defragmentation of NetBIOS Frame */
static gboolean netbios_defragment = TRUE;
/* See
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/BK8P7001/CCONTENTS
and
http://ourworld.compuserve.com/homepages/TimothyDEvans/contents.htm
for information about the NetBIOS Frame Protocol (which is what this
module dissects). */
/* the strings for the command types */
static const value_string cmd_vals[] = {
{ NB_ADD_GROUP, "Add Group Name Query" },
{ NB_ADD_NAME, "Add Name Query" },
{ NB_NAME_IN_CONFLICT, "Name In Conflict" },
{ NB_STATUS_QUERY, "Status Query" },
{ NB_TERMINATE_TRACE_R, "Terminate Trace" },
{ NB_DATAGRAM, "Datagram" },
{ NB_DATAGRAM_BCAST, "Broadcast Datagram" },
{ NB_NAME_QUERY, "Name Query" },
{ NB_ADD_NAME_RESP, "Add Name Response" },
{ NB_NAME_RESP, "Name Recognized" },
{ NB_STATUS_RESP, "Status Response" },
{ NB_TERMINATE_TRACE_LR, "Terminate Trace" },
{ NB_DATA_ACK, "Data Ack" },
{ NB_DATA_FIRST_MIDDLE, "Data First Middle" },
{ NB_DATA_ONLY_LAST, "Data Only Last" },
{ NB_SESSION_CONFIRM, "Session Confirm" },
{ NB_SESSION_END, "Session End" },
{ NB_SESSION_INIT, "Session Initialize" },
{ NB_NO_RECEIVE, "No Receive" },
{ NB_RECEIVE_OUTSTANDING, "Receive Outstanding" },
{ NB_RECEIVE_CONTINUE, "Receive Continue" },
{ NB_KEEP_ALIVE, "Session Alive" },
{ 0, NULL }
};
static value_string_ext cmd_vals_ext = VALUE_STRING_EXT_INIT(cmd_vals);
static const value_string name_types[] = {
{ 0, "Unique name" },
{ 1, "Group name" },
{ 0, NULL }
};
static const true_false_string flags_allowed = {
"Allowed",
"Not allowed"
};
static const true_false_string netb_version_str = {
"2.00 or higher",
"1.xx"
};
static const value_string termination_indicator_vals[] = {
{ 0x0000, "Normal session end" },
{ 0x0001, "Abnormal session end" },
{ 0, NULL }
};
static const value_string status_vals[] = {
{ 0, "Add name not in process" },
{ 1, "Add name in process" },
{ 0, NULL }
};
static const value_string max_frame_size_vals[] = {
{ 0, "516" },
{ 1, "1500" },
{ 2, "2052" },
{ 3, "4472" },
{ 4, "8144" },
{ 5, "11407" },
{ 6, "17800" }, /* 17800 in TR spec, 17749 in NBF spec */
{ 7, "65535" },
{ 0, NULL }
};
static gboolean
capture_netbios(const guchar *pd _U_, int offset _U_, int len _U_, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header _U_)
{
capture_dissector_increment_count(cpinfo, proto_netbios);
return TRUE;
}
int
process_netbios_name(const guchar *name_ptr, char *name_ret, int name_ret_len)
{
int i;
int name_type = *(name_ptr + NETBIOS_NAME_LEN - 1);
guchar name_char;
char *name_ret_orig = name_ret;
static const char hex_digits[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
for (i = 0; i < NETBIOS_NAME_LEN - 1; i++) {
name_char = *name_ptr++;
if (name_char >= ' ' && name_char <= '~') {
if (--name_ret_len > 0)
*name_ret++ = name_char;
} else {
/* It's not printable; show it as <XX>, where
XX is the value in hex. */
if (--name_ret_len > 0)
*name_ret++ = '<';
if (--name_ret_len > 0)
*name_ret++ = hex_digits[(name_char >> 4)];
if (--name_ret_len > 0)
*name_ret++ = hex_digits[(name_char & 0x0F)];
if (--name_ret_len > 0)
*name_ret++ = '>';
}
}
*name_ret = '\0';
/* Remove trailing space characters from name. */
name_ret--;
while (name_ret >= name_ret_orig) {
if (*name_ret != ' ') {
*(name_ret + 1) = 0;
break;
}
name_ret--;
}
return name_type;
}
int
get_netbios_name( tvbuff_t *tvb, int offset, char *name_ret, int name_ret_len)
{/* Extract the name string and name type. Return the name string in */
/* name_ret and return the name_type. */
return process_netbios_name( tvb_get_ptr( tvb, offset, NETBIOS_NAME_LEN ), name_ret, name_ret_len);
}
/*
* Get a string describing the type of a NetBIOS name.
*/
const char *
netbios_name_type_descr(int name_type)
{
return val_to_str_ext_const(name_type, &nb_name_type_vals_ext, "Unknown");
}
void
netbios_add_name(const char* label, tvbuff_t *tvb, int offset, proto_tree *tree)
{/* add a name field display tree. Display the name and station type in sub-tree */
proto_tree *field_tree;
char name_str[(NETBIOS_NAME_LEN - 1)*4 + 1];
int name_type;
const char *name_type_str;
/* decode the name field */
name_type = get_netbios_name( tvb, offset, name_str, (NETBIOS_NAME_LEN - 1)*4 + 1);
name_type_str = netbios_name_type_descr(name_type);
field_tree = proto_tree_add_subtree_format( tree, tvb, offset, NETBIOS_NAME_LEN,
ett_netb_name, NULL, "%s: %s<%02x> (%s)", label, name_str, name_type, name_type_str);
proto_tree_add_string_format( field_tree, hf_netb_nb_name, tvb, offset,
15, name_str, "%s", name_str);
proto_tree_add_uint_format( field_tree, hf_netb_nb_name_type, tvb, offset + 15, 1, name_type,
"0x%02x (%s)", name_type, name_type_str);
}
static void
netbios_data_first_middle_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_tree *field_tree;
proto_item *tf;
/* decode the flag field for Data First Middle packet*/
tf = proto_tree_add_item(tree, hf_netb_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
field_tree = proto_item_add_subtree(tf, ett_netb_flags);
proto_tree_add_item( field_tree, hf_netb_flags_ack, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_flags_ack_expected, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_flags_recv_cont_req, tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
static void
netbios_data_only_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_tree *field_tree;
proto_item *tf;
/* decode the flag field for Data Only Last packet*/
tf = proto_tree_add_item(tree, hf_netb_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
field_tree = proto_item_add_subtree(tf, ett_netb_flags);
proto_tree_add_item( field_tree, hf_netb_flags_ack, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_flags_ack_with_data, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_flags_ack_expected, tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
static void
netbios_add_ses_confirm_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_tree *field_tree;
proto_item *tf;
/* decode the flag field for Session Confirm packet */
tf = proto_tree_add_item(tree, hf_netb_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
field_tree = proto_item_add_subtree( tf, ett_netb_flags);
proto_tree_add_item( field_tree, hf_netb_flags_send_no_ack, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_version, tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
static void
netbios_add_session_init_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_tree *field_tree;
proto_item *tf;
/* decode the flag field for Session Init packet */
tf = proto_tree_add_item(tree, hf_netb_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
field_tree = proto_item_add_subtree(tf, ett_netb_flags);
proto_tree_add_item( field_tree, hf_netb_flags_send_no_ack, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_largest_frame, tvb, offset, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item( field_tree, hf_netb_version, tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
static void
netbios_no_receive_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
{
proto_tree *field_tree;
proto_item *tf;
/* decode the flag field for No Receive packet*/
tf = proto_tree_add_item(tree, hf_netbios_no_receive_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
field_tree = proto_item_add_subtree(tf, ett_netb_flags);
proto_tree_add_item(field_tree, hf_netbios_no_receive_flags_send_no_ack, tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
/************************************************************************/
/* */
/* The routines to display the netbios field values in the tree */
/* */
/************************************************************************/
static void
nb_xmit_corrl( tvbuff_t *tvb, int offset, proto_tree *tree)
{/* display the transmit correlator */
proto_tree_add_item( tree, hf_netb_xmit_corrl, tvb, offset + NB_XMIT_CORL,
2, ENC_LITTLE_ENDIAN);
}
static void
nb_resp_corrl( tvbuff_t *tvb, int offset, proto_tree *tree)
{/* display the response correlator */
proto_tree_add_item( tree, hf_netb_resp_corrl, tvb, offset + NB_RESP_CORL,
2, ENC_LITTLE_ENDIAN);
}
static void
nb_call_name_type( tvbuff_t *tvb, int offset, proto_tree *tree)
{/* display the call name type */
proto_tree_add_item( tree, hf_netb_call_name_type, tvb, offset + NB_CALL_NAME_TYPE,
1, ENC_LITTLE_ENDIAN);
}
static guint8
nb_local_session( tvbuff_t *tvb, int offset, proto_tree *tree)
{/* add the local session to tree, and return its value */
guint8 local_session = tvb_get_guint8( tvb, offset + NB_LOCAL_SES);
proto_tree_add_uint( tree, hf_netb_local_ses_no, tvb, offset + NB_LOCAL_SES, 1,
local_session);
return local_session;
}
static guint8
nb_remote_session( tvbuff_t *tvb, int offset, proto_tree *tree)
{/* add the remote session to tree, and return its value */
guint8 remote_session = tvb_get_guint8( tvb, offset + NB_RMT_SES);
proto_tree_add_uint( tree, hf_netb_remote_ses_no, tvb, offset + NB_RMT_SES, 1,
remote_session);
return remote_session;
}
static void
nb_data1(int hf, tvbuff_t *tvb, int offset, proto_tree *tree)
{/* add the DATA1 to tree with specified hf_ value */
proto_tree_add_item( tree, hf, tvb, offset + NB_DATA1, 1, ENC_LITTLE_ENDIAN);
}
static void
nb_data2(int hf, tvbuff_t *tvb, int offset, proto_tree *tree)
{/* add the DATA2 to tree with specified hf_ value */
proto_tree_add_item( tree, hf, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
}
static void
nb_resync_indicator( tvbuff_t *tvb, int offset, proto_tree *tree, const char *cmd_str)
{
guint16 resync_indicator = tvb_get_letohs( tvb, offset + NB_DATA2);
switch (resync_indicator) {
case 0x0000:
proto_tree_add_uint_format_value(tree, hf_netb_resync_indicator, tvb, offset + NB_DATA2, 2,
resync_indicator, "No re-sync");
break;
case 0x0001:
proto_tree_add_uint_format_value(tree, hf_netb_resync_indicator, tvb, offset + NB_DATA2, 2,
resync_indicator, "First '%s' following 'Receive Outstanding'", cmd_str);
break;
default:
proto_tree_add_item(tree, hf_netb_resync_indicator, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
break;
}
}
/************************************************************************/
/* */
/* The routines called by the top level to handle individual commands */
/* */
/************************************************************************/
static guint32
dissect_netb_unknown( tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree)
{/* Handle any unknown commands, do nothing */
proto_tree_add_expert(tree, pinfo, &ei_netb_unknown_command_data, tvb, offset + NB_COMMAND + 1, -1);
return 0;
}
static guint32
dissect_netb_add_group_name( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the ADD GROUP NAME QUERY command */
nb_resp_corrl( tvb, offset, tree);
netbios_add_name("Group name to add", tvb, offset + NB_SENDER_NAME,
tree);
return 0;
}
static guint32
dissect_netb_add_name( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the ADD NAME QUERY command */
nb_resp_corrl( tvb, offset, tree);
netbios_add_name("Name to add", tvb, offset + NB_SENDER_NAME, tree);
return 0;
}
static guint32
dissect_netb_name_in_conflict( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the NAME IN CONFLICT command */
netbios_add_name("Name In Conflict", tvb, offset + NB_RECVER_NAME,
tree);
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME, tree);
return 0;
}
static guint32
dissect_netb_status_query( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the STATUS QUERY command */
guint8 status_request = tvb_get_guint8( tvb, offset + NB_DATA1);
switch (status_request) {
case 0:
proto_tree_add_uint_format_value(tree, hf_netb_status_request, tvb, offset + NB_DATA1, 1,
status_request, "NetBIOS 1.x or 2.0");
break;
case 1:
proto_tree_add_uint_format_value(tree, hf_netb_status_request, tvb, offset + NB_DATA1, 1,
status_request, "NetBIOS 2.1, initial status request");
break;
default:
proto_tree_add_uint_format_value(tree, hf_netb_status_request, tvb, offset + NB_DATA1, 1,
status_request, "NetBIOS 2.1, %u names received so far",
status_request);
break;
}
nb_data2( hf_netb_status_buffer_len, tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
netbios_add_name("Receiver's Name", tvb, offset + NB_RECVER_NAME, tree);
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME, tree);
return 0;
}
static guint32
dissect_netb_terminate_trace( tvbuff_t *tvb _U_, packet_info *pinfo _U_, int offset _U_, proto_tree *tree _U_)
{/* Handle the TERMINATE TRACE command */
/*
* XXX - are any of the fields in this message significant?
* The IBM NetBIOS document shows them as "Reserved".
*/
return 0;
}
static const guchar zeroes[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
static guint32
dissect_netb_datagram( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the DATAGRAM command */
netbios_add_name("Receiver's Name", tvb, offset + NB_RECVER_NAME, tree);
/* Weird. In some datagrams, this is 10 octets of 0, followed
by a MAC address.... */
if (tvb_memeql(tvb, offset + NB_SENDER_NAME, zeroes, 10) == 0) {
proto_tree_add_item(tree, hf_netb_datagram_mac,
tvb, offset + NB_SENDER_NAME + 10, 6, ENC_NA );
} else {
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
tree);
}
return 0;
}
static guint32
dissect_netb_datagram_bcast( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the DATAGRAM BROADCAST command */
/* We assume the same weirdness can happen here.... */
if (tvb_memeql(tvb, offset + NB_SENDER_NAME, zeroes, 10) == 0) {
proto_tree_add_item(tree, hf_netb_datagram_bcast_mac,
tvb, offset + NB_SENDER_NAME + 10, 6, ENC_NA );
} else {
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
tree);
}
return 0;
}
static guint32
dissect_netb_name_query( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the NAME QUERY command */
guint8 local_session_number = tvb_get_guint8( tvb, offset + NB_DATA2);
if (local_session_number == 0) {
proto_tree_add_uint_format_value( tree, hf_netb_local_session_no, tvb, offset + NB_DATA2, 1,
local_session_number, "0 (FIND.NAME request)");
} else {
proto_tree_add_item( tree, hf_netb_local_session_no, tvb, offset + NB_DATA2, 1, ENC_LITTLE_ENDIAN);
}
nb_call_name_type( tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
netbios_add_name("Query Name", tvb, offset + NB_RECVER_NAME, tree);
if (local_session_number != 0) {
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
tree);
}
return 0;
}
static guint32
dissect_netb_add_name_resp( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the ADD NAME RESPONSE command */
nb_data1( hf_netb_status, tvb, offset, tree);
nb_data2( hf_netb_name_type, tvb, offset, tree);
nb_xmit_corrl( tvb, offset, tree);
netbios_add_name("Name to be added", tvb, offset + NB_RECVER_NAME,
tree);
netbios_add_name("Name to be added", tvb, offset + NB_SENDER_NAME,
tree);
return 0;
}
static guint32
dissect_netb_name_resp( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the NAME RECOGNIZED command */
guint8 local_session_number = tvb_get_guint8( tvb, offset + NB_DATA2);
switch (local_session_number) {
case 0x00:
proto_tree_add_uint_format_value( tree, hf_netb_state_of_name, tvb, offset + NB_DATA2, 1,
local_session_number, "No LISTEN pending, or FIND.NAME response");
break;
case 0xFF:
proto_tree_add_uint_format_value( tree, hf_netb_state_of_name, tvb, offset + NB_DATA2, 1,
local_session_number, "LISTEN pending, but insufficient resources to establish session");
break;
default:
proto_tree_add_item( tree, hf_netb_local_session_no, tvb, offset + NB_DATA2, 1, ENC_LITTLE_ENDIAN);
break;
}
nb_call_name_type( tvb, offset, tree);
nb_xmit_corrl( tvb, offset, tree);
if (local_session_number != 0x00 && local_session_number != 0xFF)
nb_resp_corrl(tvb, offset, tree);
netbios_add_name("Receiver's Name", tvb, offset + NB_RECVER_NAME, tree);
if (local_session_number != 0x00 && local_session_number != 0xFF) {
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
tree);
}
return 0;
}
static guint32
dissect_netb_status_resp( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the STATUS RESPONSE command */
guint8 status_response = tvb_get_guint8( tvb, offset + NB_DATA1);
proto_item *td2;
proto_tree *data2_tree;
nb_call_name_type( tvb, offset, tree);
if (status_response == 0) {
proto_tree_add_uint_format_value(tree, hf_netb_status_response, tvb, offset + NB_DATA1, 1,
status_response, "NetBIOS 1.x or 2.0");
} else {
proto_tree_add_uint_format_value(tree, hf_netb_status_response, tvb, offset + NB_DATA1, 1,
status_response, "NetBIOS 2.1, %u names sent so far",
status_response);
}
td2 = proto_tree_add_item(tree, hf_netb_data2, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
data2_tree = proto_item_add_subtree(td2, ett_netb_status);
proto_tree_add_item(data2_tree, hf_netb_data2_frame, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(data2_tree, hf_netb_data2_user, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(data2_tree, hf_netb_data2_status, tvb, offset + NB_DATA2, 2, ENC_LITTLE_ENDIAN);
nb_xmit_corrl( tvb, offset, tree);
netbios_add_name("Receiver's Name", tvb, offset + NB_RECVER_NAME, tree);
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
tree);
return 0;
}
static guint32
dissect_netb_data_ack( tvbuff_t* tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the DATA ACK command */
nb_xmit_corrl( tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_data_first_middle( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the DATA FIRST MIDDLE command */
guint8 remote_session, local_session;
/*
* This is the first frame, or the middle frame, of a fragmented
* packet.
*
* XXX - there are no sequence numbers, so we have to assume
* that fragments arrive in order with no duplicates.
* In fact, 802.2 LLC is supposed to handle that, so we
* might have to have the LLC dissector do so (but the TCP
* dissector doesn't currently handle out-of-order or duplicate
* data, either).
*/
netbios_data_first_middle_flags( tvb, tree, offset + NB_FLAGS);
nb_resync_indicator( tvb, offset, tree, "DATA FIRST MIDDLE");
nb_xmit_corrl( tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
remote_session = nb_remote_session( tvb, offset, tree);
local_session = nb_local_session( tvb, offset, tree);
/*
* Return a combination of the remote and local session numbers,
* for use when reassembling.
*/
return (remote_session << 8) + local_session;
}
static guint32
dissect_netb_data_only_last( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the DATA ONLY LAST command */
guint8 remote_session, local_session;
/*
* This is a complete packet, or the last frame of a fragmented
* packet.
*/
netbios_data_only_flags( tvb, tree, offset + NB_FLAGS);
nb_resync_indicator( tvb, offset, tree, "DATA ONLY LAST");
nb_xmit_corrl( tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
remote_session = nb_remote_session( tvb, offset, tree);
local_session = nb_local_session( tvb, offset, tree);
/*
* Return a combination of the remote and local session numbers,
* for use when reassembling.
*/
return (remote_session << 8) + local_session;
}
static guint32
dissect_netb_session_confirm( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the SESSION CONFIRM command */
netbios_add_ses_confirm_flags( tvb, tree, offset + NB_FLAGS);
nb_data2( hf_netb_max_data_recv_size, tvb, offset, tree);
nb_xmit_corrl( tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_session_end( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the SESSION END command */
nb_data2( hf_netb_termination_indicator, tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_session_init( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the SESSION INITIALIZE command */
netbios_add_session_init_flags( tvb, tree, offset + NB_FLAGS);
nb_data2( hf_netb_max_data_recv_size, tvb, offset, tree);
nb_resp_corrl( tvb, offset, tree);
nb_xmit_corrl( tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_no_receive( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the NO RECEIVE command */
netbios_no_receive_flags( tvb, tree, offset + NB_FLAGS);
nb_data2( hf_netb_num_data_bytes_accepted, tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_receive_outstanding( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the RECEIVE OUTSTANDING command */
nb_data2( hf_netb_num_data_bytes_accepted, tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_receive_continue( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the RECEIVE CONTINUE command */
nb_xmit_corrl( tvb, offset, tree);
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
static guint32
dissect_netb_session_alive( tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree)
{/* Handle the SESSION ALIVE command */
/*
* XXX - all the fields are claimed to be "Reserved", but
* the session numbers appear to be non-zero in at least
* one capture, and they do appear to match session numbers
* in other messages, and I'd expect that you had to identify
* sessions in this message in any case.
*
* We show only those fields.
*/
nb_remote_session( tvb, offset, tree);
nb_local_session( tvb, offset, tree);
return 0;
}
/************************************************************************/
/* */
/* The table routines called by the top level to handle commands */
/* */
/************************************************************************/
static guint32 (*const dissect_netb[])(tvbuff_t *, packet_info *, int, proto_tree *) = {
dissect_netb_add_group_name, /* Add Group Name 0x00 */
dissect_netb_add_name, /* Add Name 0x01 */
dissect_netb_name_in_conflict, /* Name In Conflict 0x02 */
dissect_netb_status_query, /* Status Query 0x03 */
dissect_netb_unknown, /* unknown 0x04 */
dissect_netb_unknown, /* unknown 0x05 */
dissect_netb_unknown, /* unknown 0x06 */
dissect_netb_terminate_trace, /* Terminate Trace 0x07 */
dissect_netb_datagram, /* Datagram 0x08 */
dissect_netb_datagram_bcast, /* Datagram Broadcast 0x09 */
dissect_netb_name_query, /* Name Query 0x0A */
dissect_netb_unknown, /* unknown 0x0B */
dissect_netb_unknown, /* unknown 0x0C */
dissect_netb_add_name_resp, /* Add Name Response 0x0D */
dissect_netb_name_resp, /* Name Recognized 0x0E */
dissect_netb_status_resp, /* Status Response 0x0F */
dissect_netb_unknown, /* unknown 0x10 */
dissect_netb_unknown, /* unknown 0x11 */
dissect_netb_unknown, /* unknown 0x12 */
dissect_netb_terminate_trace, /* Terminate Trace 0x13 */
dissect_netb_data_ack, /* Data Ack 0x14 */
dissect_netb_data_first_middle, /* Data First Middle 0x15 */
dissect_netb_data_only_last, /* Data Only Last 0x16 */
dissect_netb_session_confirm, /* Session Confirm 0x17 */
dissect_netb_session_end, /* Session End 0x18 */
dissect_netb_session_init, /* Session Initialize 0x19 */
dissect_netb_no_receive, /* No Receive 0x1A */
dissect_netb_receive_outstanding, /* Receive Outstanding 0x1B */
dissect_netb_receive_continue, /* Receive Continue 0x1C */
dissect_netb_unknown, /* unknown 0x1D */
dissect_netb_unknown, /* unknown 0x1E */
dissect_netb_session_alive, /* Session Alive 0x1f */
dissect_netb_unknown,
};
static heur_dissector_list_t netbios_heur_subdissector_list;
static void
dissect_netbios_payload(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
heur_dtbl_entry_t *hdtbl_entry;
/*
* Try the heuristic dissectors for NetBIOS; if none of them
* accept the packet, dissect it as data.
*/
if (!dissector_try_heuristic(netbios_heur_subdissector_list,
tvb, pinfo, tree, &hdtbl_entry, NULL))
call_data_dissector(tvb, pinfo, tree);
}
static int
dissect_netbios(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *netb_tree = NULL;
proto_item *ti;
guint16 hdr_len, command;
const char *command_name;
char name[(NETBIOS_NAME_LEN - 1)*4 + 1];
int name_type;
guint16 session_id;
gboolean save_fragmented;
int len;
fragment_head *fd_head;
tvbuff_t *next_tvb;
int offset = 0;
/* load the display labels */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "NetBIOS");
/* Find NetBIOS marker EFFF, this is done because I have seen an extra LLC */
/* byte on our network. This only checks for one extra LLC byte. */
if ( 0xefff != tvb_get_letohs(tvb, 2)){
++offset;
if ( 0xefff != tvb_get_letohs(tvb, 3)){
/* print bad packet */
col_set_str( pinfo->cinfo, COL_INFO, "Bad packet, no 0xEFFF marker");
return 3; /* this is an unknown packet, no marker */
}
}
hdr_len = tvb_get_letohs(tvb, offset + NB_LENGTH);
command = tvb_get_guint8( tvb, offset + NB_COMMAND);
/* limit command so no table overflows */
command = MIN( command, sizeof( dissect_netb)/ sizeof(void *));
/* print command name */
command_name = val_to_str_ext(command, &cmd_vals_ext, "Unknown (0x%02x)");
switch ( command ) {
case NB_NAME_QUERY:
name_type = get_netbios_name( tvb, offset + 12, name, (NETBIOS_NAME_LEN - 1)*4 + 1);
col_add_fstr( pinfo->cinfo, COL_INFO, "%s for %s<%02x>", command_name, name, name_type);
break;
case NB_NAME_RESP:
case NB_ADD_NAME:
case NB_ADD_GROUP:
name_type = get_netbios_name( tvb, offset + 28, name, (NETBIOS_NAME_LEN - 1)*4 + 1);
col_add_fstr( pinfo->cinfo, COL_INFO, "%s - %s<%02x>", command_name, name, name_type);
break;
default:
col_add_str( pinfo->cinfo, COL_INFO, command_name);
break;
}
if ( tree) {
ti = proto_tree_add_item(tree, proto_netbios, tvb, 0, hdr_len, ENC_NA);
netb_tree = proto_item_add_subtree(ti, ett_netb);
proto_tree_add_uint_format_value(netb_tree, hf_netb_hdr_len, tvb, offset, 2, hdr_len,
"%d bytes", hdr_len);
proto_tree_add_uint_format_value(netb_tree, hf_netb_delimiter, tvb, offset + 2, 2,
tvb_get_letohs(tvb, offset + 2), "EFFF (NetBIOS)");
proto_tree_add_uint(netb_tree, hf_netb_cmd, tvb, offset + NB_COMMAND, 1, command);
}
/* if command in table range */
if ( command < sizeof( dissect_netb)/ sizeof(void *)) {
/* branch to handle commands */
session_id = (dissect_netb[ command])( tvb, pinfo, offset, netb_tree);
offset += hdr_len; /* move past header */
save_fragmented = pinfo->fragmented;
/*
* Process user data in frames that have it.
*/
switch (command) {
case NB_DATAGRAM:
case NB_DATAGRAM_BCAST:
/*
* No fragmentation here.
*/
next_tvb = tvb_new_subset_remaining(tvb, offset);
dissect_netbios_payload(next_tvb, pinfo, tree);
break;
case NB_DATA_FIRST_MIDDLE:
case NB_DATA_ONLY_LAST:
/*
* Possibly fragmented.
*/
len = tvb_reported_length_remaining(tvb, offset);
if (netbios_defragment &&
tvb_bytes_exist(tvb, offset, len)) {
fd_head = fragment_add_seq_next(&netbios_reassembly_table,
tvb, offset,
pinfo, session_id, NULL,
len, command == NB_DATA_FIRST_MIDDLE);
if (fd_head != NULL) {
if (fd_head->next != NULL) {
next_tvb = tvb_new_chain(tvb, fd_head->tvb_data);
add_new_data_source(pinfo,
next_tvb,
"Reassembled NetBIOS");
/* Show all fragments. */
if (tree) {
proto_item *frag_tree_item;
show_fragment_seq_tree(fd_head,
&netbios_frag_items,
netb_tree, pinfo,
next_tvb, &frag_tree_item);
}
} else {
next_tvb = tvb_new_subset_remaining(tvb,
offset);
}
} else {
next_tvb = NULL;
}
} else {
/*
* Dissect this, regardless of whether
* it's NB_DATA_FIRST_MIDDLE or
* NB_DATA_ONLY_LAST.
*
* XXX - it'd be nice to show
* NB_DATA_FIRST_MIDDLE as a fragment
* if it's not the first fragment (i.e.,
* MIDDLE rather than FIRST), and show
* NB_DATA_ONLY_LAST as a fragment if
* it's part of a fragmented datagram
* (i.e, LAST rather than ONLY), but
* we'd have to do reassembly to
* be able to determine that.
*/
next_tvb = tvb_new_subset_remaining(tvb, offset);
}
if (next_tvb != NULL)
dissect_netbios_payload(next_tvb, pinfo, tree);
else {
next_tvb = tvb_new_subset_remaining (tvb, offset);
call_data_dissector(next_tvb, pinfo, tree);
}
break;
}
pinfo->fragmented = save_fragmented;
}
return tvb_captured_length(tvb);
}
void
proto_register_netbios(void)
{
static gint *ett[] = {
&ett_netb,
&ett_netb_name,
&ett_netb_flags,
&ett_netb_status,
&ett_netb_fragments,
&ett_netb_fragment,
};
static hf_register_info hf_netb[] = {
{ &hf_netb_cmd,
{ "Command", "netbios.command", FT_UINT8, BASE_HEX | BASE_EXT_STRING,
&cmd_vals_ext, 0x0, NULL, HFILL }},
{ &hf_netb_hdr_len,
{ "Length", "netbios.hdr_len", FT_UINT16, BASE_DEC,
NULL, 0x0, "Header Length", HFILL }},
{ &hf_netb_delimiter,
{ "Delimiter", "netbios.delimiter", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_xmit_corrl,
{ "Transmit Correlator", "netbios.xmit_corrl", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_resp_corrl,
{ "Response Correlator", "netbios.resp_corrl", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_call_name_type,
{ "Caller's Name Type", "netbios.call_name_type", FT_UINT8, BASE_HEX,
VALS(name_types), 0x0, NULL, HFILL }},
{ &hf_netb_nb_name_type,
{ "NetBIOS Name Type", "netbios.nb_name_type", FT_UINT8, BASE_HEX |BASE_EXT_STRING,
&nb_name_type_vals_ext, 0x0, NULL, HFILL }},
{ &hf_netb_nb_name,
{ "NetBIOS Name", "netbios.nb_name", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_version,
{ "NetBIOS Version", "netbios.version", FT_BOOLEAN, 8,
TFS( &netb_version_str), 0x01, NULL, HFILL }},
{ &hf_netbios_no_receive_flags,
{ "Flags", "netbios.no_receive_flags", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_netbios_no_receive_flags_send_no_ack,
{ "SEND.NO.ACK data received", "netbios.no_receive_flags.send_no_ack", FT_BOOLEAN, 8,
TFS( &tfs_no_yes), 0x02, NULL, HFILL }},
{ &hf_netb_largest_frame,
{ "Largest Frame", "netbios.largest_frame", FT_UINT8, BASE_DEC,
VALS(max_frame_size_vals), 0x0E, NULL, HFILL }},
{ &hf_netb_status_buffer_len,
{ "Length of status buffer", "netbios.status_buffer_len", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_status,
{ "Status", "netbios.status", FT_UINT8, BASE_DEC,
VALS(status_vals), 0x0, NULL, HFILL }},
{ &hf_netb_name_type,
{ "Name type", "netbios.name_type", FT_UINT16, BASE_DEC,
VALS(name_types), 0x0, NULL, HFILL }},
{ &hf_netb_max_data_recv_size,
{ "Maximum data receive size", "netbios.max_data_recv_size", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_termination_indicator,
{ "Termination indicator", "netbios.termination_indicator", FT_UINT16, BASE_HEX,
VALS(termination_indicator_vals), 0x0, NULL, HFILL }},
{ &hf_netb_num_data_bytes_accepted,
{ "Number of data bytes accepted", "netbios.num_data_bytes_accepted", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_local_ses_no,
{ "Local Session No.", "netbios.local_session", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_remote_ses_no,
{ "Remote Session No.", "netbios.remote_session", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_flags,
{ "Flags", "netbios.flags", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_flags_send_no_ack,
{ "Handle SEND.NO.ACK", "netbios.flags.send_no_ack", FT_BOOLEAN, 8,
TFS( &tfs_yes_no), 0x80, NULL, HFILL }},
{ &hf_netb_flags_ack,
{ "Acknowledge", "netbios.flags.ack", FT_BOOLEAN, 8,
TFS( &tfs_set_notset), 0x08, NULL, HFILL }},
{ &hf_netb_flags_ack_with_data,
{ "Acknowledge with data", "netbios.flags.ack_with_data", FT_BOOLEAN, 8,
TFS( &flags_allowed), 0x04, NULL, HFILL }},
{ &hf_netb_flags_ack_expected,
{ "Acknowledge expected", "netbios.flags.ack_expected", FT_BOOLEAN, 8,
TFS( &tfs_yes_no), 0x02, NULL, HFILL }},
{ &hf_netb_flags_recv_cont_req,
{ "RECEIVE_CONTINUE requested", "netbios.flags.recv_cont_req", FT_BOOLEAN, 8,
TFS( &tfs_yes_no), 0x01, NULL, HFILL }},
{ &hf_netb_data2,
{ "DATA2 value", "netbios.data2", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_data2_frame,
{ "Data length exceeds maximum frame size", "netbios.data2.frame", FT_BOOLEAN, 16,
TFS(&tfs_yes_no), 0x8000, NULL, HFILL }},
{ &hf_netb_data2_user,
{ "Data length exceeds user's buffer", "netbios.data2.user", FT_BOOLEAN, 16,
TFS(&tfs_yes_no), 0x4000, NULL, HFILL }},
{ &hf_netb_data2_status,
{ "Status data length", "netbios.data2.status", FT_UINT16, BASE_DEC,
NULL, 0x3FFF, NULL, HFILL }},
{ &hf_netb_datagram_mac,
{ "Sender's MAC Address", "netbios.datagram_mac", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_datagram_bcast_mac,
{ "Sender's Node Address", "netbios.datagram_bcast_mac", FT_ETHER, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_resync_indicator,
{ "Re-sync indicator", "netbios.resync_indicator", FT_UINT16, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_status_request,
{ "Status request", "netbios.status_request", FT_UINT8, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_local_session_no,
{ "Local Session No.", "netbios.local_session_no", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_state_of_name,
{ "State of name", "netbios.state_of_name", FT_UINT8, BASE_HEX,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_status_response,
{ "Status response", "netbios.status_response", FT_UINT8, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_fragment_overlap,
{ "Fragment overlap", "netbios.fragment.overlap", FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "Fragment overlaps with other fragments", HFILL }},
{ &hf_netb_fragment_overlap_conflict,
{ "Conflicting data in fragment overlap", "netbios.fragment.overlap.conflict",
FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "Overlapping fragments contained conflicting data", HFILL }},
{ &hf_netb_fragment_multiple_tails,
{ "Multiple tail fragments found", "netbios.fragment.multipletails",
FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "Several tails were found when defragmenting the packet", HFILL }},
{ &hf_netb_fragment_too_long_fragment,
{ "Fragment too long", "netbios.fragment.toolongfragment", FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "Fragment contained data past end of packet", HFILL }},
{ &hf_netb_fragment_error,
{ "Defragmentation error", "netbios.fragment.error", FT_FRAMENUM, BASE_NONE,
NULL, 0x0, "Defragmentation error due to illegal fragments", HFILL }},
{ &hf_netb_fragment_count,
{ "Fragment count", "netbios.fragment.count", FT_UINT32, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_fragment,
{ "NetBIOS Fragment", "netbios.fragment", FT_FRAMENUM, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_fragments,
{ "NetBIOS Fragments", "netbios.fragments", FT_NONE, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_netb_reassembled_length,
{"Reassembled NetBIOS length", "netbios.reassembled.length", FT_UINT32, BASE_DEC,
NULL, 0x0, "The total length of the reassembled payload", HFILL }},
};
static ei_register_info ei[] = {
{ &ei_netb_unknown_command_data, { "netbios.unknown_command_data", PI_UNDECODED, PI_WARN, "Unknown NetBIOS command data", EXPFILL }},
};
module_t *netbios_module;
expert_module_t* expert_netbios;
proto_netbios = proto_register_protocol("NetBIOS", "NetBIOS", "netbios");
proto_register_subtree_array(ett, array_length(ett));
proto_register_field_array(proto_netbios, hf_netb, array_length(hf_netb));
expert_netbios = expert_register_protocol(proto_netbios);
expert_register_field_array(expert_netbios, ei, array_length(ei));
netbios_heur_subdissector_list = register_heur_dissector_list("netbios", proto_netbios);
netbios_module = prefs_register_protocol(proto_netbios, NULL);
prefs_register_bool_preference(netbios_module, "defragment",
"Reassemble fragmented NetBIOS messages spanning multiple frames",
"Whether the NetBIOS dissector should defragment messages spanning multiple frames",
&netbios_defragment);
reassembly_table_register(&netbios_reassembly_table,
&addresses_reassembly_table_functions);
}
void
proto_reg_handoff_netbios(void)
{
dissector_handle_t netbios_handle;
capture_dissector_handle_t netbios_cap_handle;
netbios_handle = create_dissector_handle(dissect_netbios, proto_netbios);
dissector_add_uint("llc.dsap", SAP_NETBIOS, netbios_handle);
netbios_cap_handle = create_capture_dissector_handle(capture_netbios, proto_netbios);
capture_dissector_add_uint("llc.dsap", SAP_NETBIOS, netbios_cap_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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