forked from osmocom/wireshark
1151 lines
33 KiB
C
1151 lines
33 KiB
C
/* packet-netbios.c
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* Routines for NetBIOS protocol packet disassembly
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* Jeff Foster <jfoste@woodward.com>
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* Copyright 1999 Jeffrey C. Foster
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*
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* derived from the packet-nbns.c
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*
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* $Id: packet-netbios.c,v 1.42 2001/12/03 03:59:37 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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#include "llcsaps.h"
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#include "packet-netbios.h"
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/* Netbios command numbers */
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#define NB_ADD_GROUP 0x00
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#define NB_ADD_NAME 0x01
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#define NB_NAME_IN_CONFLICT 0x02
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#define NB_STATUS_QUERY 0x03
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#define NB_TERMINATE_TRACE_R 0x07
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#define NB_DATAGRAM 0x08
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#define NB_DATAGRAM_BCAST 0x09
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#define NB_NAME_QUERY 0x0a
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#define NB_ADD_NAME_RESP 0x0d
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#define NB_NAME_RESP 0x0e
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#define NB_STATUS_RESP 0x0f
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#define NB_TERMINATE_TRACE_LR 0x13
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#define NB_DATA_ACK 0x14
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#define NB_DATA_FIRST_MIDDLE 0x15
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#define NB_DATA_ONLY_LAST 0x16
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#define NB_SESSION_CONFIRM 0x17
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#define NB_SESSION_END 0x18
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#define NB_SESSION_INIT 0x19
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#define NB_NO_RECEIVE 0x1a
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#define NB_RECEIVE_OUTSTANDING 0x1b
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#define NB_RECEIVE_CONTINUE 0x1c
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#define NB_KEEP_ALIVE 0x1f
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/* Offsets of fields in the NetBIOS header. */
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#define NB_LENGTH 0
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#define NB_DELIMITER 2
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#define NB_COMMAND 4
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#define NB_FLAGS 5
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#define NB_DATA1 5
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#define NB_RESYNC 6
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#define NB_DATA2 6
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#define NB_CALL_NAME_TYPE 7
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#define NB_XMIT_CORL 8
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#define NB_RESP_CORL 10
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#define NB_RMT_SES 12
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#define NB_LOCAL_SES 13
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#define NB_RECVER_NAME 12
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#define NB_SENDER_NAME 28
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static int proto_netbios = -1;
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static int hf_netb_cmd = -1;
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static int hf_netb_hdr_len = -1;
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static int hf_netb_xmit_corrl = -1;
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static int hf_netb_resp_corrl = -1;
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static int hf_netb_call_name_type = -1;
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static int hf_netb_ack = -1;
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static int hf_netb_ack_with_data = -1;
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static int hf_netb_ack_expected = -1;
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static int hf_netb_recv_cont_req = -1;
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static int hf_netb_send_no_ack = -1;
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static int hf_netb_version = -1;
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static int hf_netb_largest_frame = -1;
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static int hf_netb_name = -1;
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static int hf_netb_name_type = -1;
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static int hf_netb_local_ses_no = -1;
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static int hf_netb_remote_ses_no = -1;
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static int hf_netb_data2 = -1;
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static gint ett_netb = -1;
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static gint ett_netb_name = -1;
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static gint ett_netb_flags = -1;
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static gint ett_netb_status = -1;
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static dissector_handle_t data_handle;
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/* The strings for the station type, used by get_netbios_name function;
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many of them came from the file "NetBIOS.txt" in the Zip archive at
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http://www.net3group.com/ftp/browser.zip
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*/
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static const value_string name_type_vals[] = {
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{0x00, "Workstation/Redirector"},
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{0x01, "Browser"},
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{0x02, "Workstation/Redirector"},
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/* not sure what 0x02 is, I'm seeing alot of them however */
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/* i'm seeing them with workstation/redirection host
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announcements */
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{0x03, "Messenger service/Main name"},
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{0x05, "Forwarded name"},
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{0x06, "RAS Server service"},
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{0x1b, "Domain Master Browser"},
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{0x1c, "Domain Controllers"},
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{0x1d, "Local Master Browser"},
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{0x1e, "Browser Election Service"},
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{0x1f, "Net DDE Service"},
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{0x20, "Server service"},
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{0x21, "RAS client service"},
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{0x22, "Exchange Interchange (MSMail Connector)"},
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{0x23, "Exchange Store"},
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{0x24, "Exchange Directory"},
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{0x2b, "Lotus Notes Server service"},
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{0x30, "Modem sharing server service"},
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{0x31, "Modem sharing client service"},
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{0x43, "SMS Clients Remote Control"},
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{0x44, "SMS Administrators Remote Control Tool"},
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{0x45, "SMS Clients Remote Chat"},
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{0x46, "SMS Clients Remote Transfer"},
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{0x4c, "DEC Pathworks TCP/IP Service on Windows NT"},
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{0x52, "DEC Pathworks TCP/IP Service on Windows NT"},
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{0x6a, "Microsoft Exchange IMC"},
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{0x87, "Microsoft Exchange MTA"},
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{0xbe, "Network Monitor Agent"},
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{0xbf, "Network Monitor Analyzer"},
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{0x00, NULL}
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};
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/* See
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http://www.s390.ibm.com/bookmgr-cgi/bookmgr.cmd/BOOKS/BK8P7001/CCONTENTS
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and
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http://ourworld.compuserve.com/homepages/TimothyDEvans/contents.htm
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for information about the NetBIOS Frame Protocol (which is what this
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module dissects). */
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/* the strings for the command types */
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static char *CommandName[] = {
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"Add Group Name Query", /* 0x00 */
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"Add Name Query", /* 0x01 */
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"Name In Conflict", /* 0x02 */
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"Status Query", /* 0x03 */
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"Unknown",
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"Unknown",
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"Unknown",
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"Terminate Trace", /* 0x07 */
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"Datagram", /* 0x08 */
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"Broadcast Datagram", /* 0x09 */
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"Name Query", /* 0x0A */
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"Unknown",
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"Unknown",
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"Add Name Response", /* 0x0D */
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"Name Recognized", /* 0x0E */
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"Status Response", /* 0x0F */
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"Unknown",
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"Unknown",
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"Unknown",
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"Terminate Trace", /* 0x13 */
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"Data Ack", /* 0x14 */
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"Data First Middle", /* 0x15 */
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"Data Only Last", /* 0x16 */
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"Session Confirm", /* 0x17 */
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"Session End", /* 0x18 */
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"Session Initialize", /* 0x19 */
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"No Receive", /* 0x1a */
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"Receive Outstanding", /* 0x1b */
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"Receive Continue", /* 0x1c */
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"Unknown",
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"Unknown",
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"Session Alive", /* 0x1f */
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"Unknown",
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};
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static const true_false_string flags_set = {
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"Set",
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"Not set"
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};
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static const true_false_string flags_allowed = {
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"Allowed",
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"Not allowrd"
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};
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static const true_false_string flags_yes_no = {
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"Yes",
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"No"
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};
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static const true_false_string netb_version_str = {
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"2.00 or higher",
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"1.xx"
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};
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void capture_netbios(const u_char *pd, int offset, int len, packet_counts *ld)
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{
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ld->netbios++;
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}
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int
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process_netbios_name(const u_char *name_ptr, char *name_ret)
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{
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int i;
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int name_type = *(name_ptr + NETBIOS_NAME_LEN - 1);
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u_char name_char;
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static const char hex_digits[16] = "0123456789abcdef";
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for (i = 0; i < NETBIOS_NAME_LEN - 1; i++) {
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name_char = *name_ptr++;
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if (name_char >= ' ' && name_char <= '~')
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*name_ret++ = name_char;
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else {
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/* It's not printable; show it as <XX>, where
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XX is the value in hex. */
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*name_ret++ = '<';
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*name_ret++ = hex_digits[(name_char >> 4)];
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*name_ret++ = hex_digits[(name_char & 0x0F)];
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*name_ret++ = '>';
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}
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}
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*name_ret = '\0';
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return name_type;
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}
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int get_netbios_name( tvbuff_t *tvb, int offset, char *name_ret)
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{/* Extract the name string and name type. Return the name string in */
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/* name_ret and return the name_type. */
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return process_netbios_name( tvb_get_ptr( tvb, offset, NETBIOS_NAME_LEN ), name_ret);
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}
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/*
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* Get a string describing the type of a NetBIOS name.
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*/
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char *
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netbios_name_type_descr(int name_type)
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{
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return val_to_str(name_type, name_type_vals, "Unknown");
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}
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void netbios_add_name(char* label, tvbuff_t *tvb, int offset,
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proto_tree *tree)
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{/* add a name field display tree. Display the name and station type in sub-tree */
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proto_tree *field_tree;
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proto_item *tf;
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char name_str[(NETBIOS_NAME_LEN - 1)*4 + 1];
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int name_type;
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char *name_type_str;
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/* decode the name field */
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name_type = get_netbios_name( tvb, offset, name_str);
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name_type_str = netbios_name_type_descr(name_type);
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tf = proto_tree_add_text( tree, tvb, offset, NETBIOS_NAME_LEN,
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"%s: %s<%02x> (%s)", label, name_str, name_type, name_type_str);
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field_tree = proto_item_add_subtree( tf, ett_netb_name);
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proto_tree_add_string_format( field_tree, hf_netb_name, tvb, offset,
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15, name_str, "%s", name_str);
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proto_tree_add_uint_format( field_tree, hf_netb_name_type, tvb, offset + 15, 1, name_type,
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"0x%02x (%s)", name_type, name_type_str);
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}
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static void netbios_data_first_middle_flags( tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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proto_tree *field_tree;
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proto_item *tf;
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guint flags = tvb_get_guint8( tvb, offset);
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/* decode the flag field for Data First Middle packet*/
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tf = proto_tree_add_text(tree, tvb, offset, 1,
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"Flags: 0x%02x", flags);
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field_tree = proto_item_add_subtree(tf, ett_netb_flags);
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proto_tree_add_boolean( field_tree, hf_netb_ack, tvb, offset, 1, flags);
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proto_tree_add_boolean( field_tree, hf_netb_ack_expected, tvb, offset, 1, flags);
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proto_tree_add_boolean( field_tree, hf_netb_recv_cont_req, tvb, offset, 1, flags);
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}
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static void netbios_data_only_flags( tvbuff_t *tvb, proto_tree *tree,
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int offset)
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{
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proto_tree *field_tree;
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proto_item *tf;
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guint flags = tvb_get_guint8( tvb, offset);
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/* decode the flag field for Data Only Last packet*/
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tf = proto_tree_add_text(tree, tvb, offset, 1,
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"Flags: 0x%02x", flags);
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field_tree = proto_item_add_subtree(tf, ett_netb_flags);
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proto_tree_add_boolean( field_tree, hf_netb_ack, tvb, offset, 1, flags);
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proto_tree_add_boolean( field_tree, hf_netb_ack_with_data, tvb, offset, 1, flags);
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proto_tree_add_boolean( field_tree, hf_netb_ack_expected, tvb, offset, 1, flags);
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}
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static void netbios_add_ses_confirm_flags( tvbuff_t *tvb, proto_tree *tree,
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int offset)
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{
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proto_tree *field_tree;
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proto_item *tf;
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guint flags = tvb_get_guint8( tvb, offset);
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/* decode the flag field for Session Confirm packet */
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tf = proto_tree_add_text(tree, tvb, offset, 1,
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"Flags: 0x%02x", flags);
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field_tree = proto_item_add_subtree( tf, ett_netb_flags);
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proto_tree_add_boolean( field_tree, hf_netb_send_no_ack, tvb, offset, 1, flags);
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proto_tree_add_boolean( field_tree, hf_netb_version, tvb, offset, 1, flags);
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}
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static void netbios_add_session_init_flags( tvbuff_t *tvb, proto_tree *tree,
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int offset)
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{
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proto_tree *field_tree;
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proto_item *tf;
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guint flags = tvb_get_guint8( tvb, offset);
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/* decode the flag field for Session Init packet */
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tf = proto_tree_add_text(tree, tvb, offset, 1,
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"Flags: 0x%02x", flags);
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field_tree = proto_item_add_subtree(tf, ett_netb_flags);
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proto_tree_add_boolean( field_tree, hf_netb_send_no_ack, tvb, offset, 1, flags);
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proto_tree_add_uint( field_tree, hf_netb_largest_frame, tvb, offset, 1,
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flags);
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proto_tree_add_boolean( field_tree, hf_netb_version, tvb, offset, 1, flags);
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}
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static void netbios_no_receive_flags( tvbuff_t *tvb, proto_tree *tree,
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int offset)
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{
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proto_tree *field_tree;
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proto_item *tf;
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guint flags = tvb_get_guint8( tvb, offset);
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/* decode the flag field for No Receive packet*/
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tf = proto_tree_add_text(tree, tvb, offset, 1,
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"Flags: 0x%02x", flags);
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if (flags & 0x02) {
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field_tree = proto_item_add_subtree(tf, ett_netb_flags);
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proto_tree_add_text(field_tree, tvb, offset, 1, "%s",
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decode_boolean_bitfield(flags, 0x02, 8,
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"SEND.NO.ACK data not received", NULL));
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}
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}
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/************************************************************************/
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/* */
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/* The routines to display the netbios field values in the tree */
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/* */
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/************************************************************************/
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static void nb_xmit_corrl( tvbuff_t *tvb, int offset, proto_tree *tree)
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{/* display the transmit correlator */
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proto_tree_add_int( tree, hf_netb_xmit_corrl, tvb, offset + NB_XMIT_CORL,
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2, tvb_get_letohs( tvb, offset + NB_XMIT_CORL));
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}
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static void nb_resp_corrl( tvbuff_t *tvb, int offset, proto_tree *tree)
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{/* display the response correlator */
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proto_tree_add_int( tree, hf_netb_resp_corrl, tvb, offset + NB_RESP_CORL,
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2, tvb_get_letohs( tvb, offset + NB_RESP_CORL));
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}
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static void nb_call_name_type( tvbuff_t *tvb, int offset, proto_tree *tree)
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{/* display the call name type */
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int name_type_value = tvb_get_guint8( tvb, offset + NB_CALL_NAME_TYPE);
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switch (name_type_value) {
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case 0x00:
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proto_tree_add_int_format( tree, hf_netb_call_name_type, tvb, offset + NB_CALL_NAME_TYPE,
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2, tvb_get_letohs( tvb, offset + NB_CALL_NAME_TYPE), "Caller's Name Type: Unique name");
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break;
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case 0x01:
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proto_tree_add_int_format( tree, hf_netb_call_name_type, tvb, offset + NB_CALL_NAME_TYPE,
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2, tvb_get_letohs( tvb, offset + NB_CALL_NAME_TYPE), "Caller's Name Type: Group name");
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break;
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default:
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proto_tree_add_int_format( tree, hf_netb_call_name_type, tvb, offset + NB_CALL_NAME_TYPE,
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2, tvb_get_letohs( tvb, offset + NB_CALL_NAME_TYPE),
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"Caller's Name Type: 0x%02x (should be 0 or 1)", name_type_value);
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break;
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}
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}
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static void nb_local_session( tvbuff_t *tvb, int offset, proto_tree *tree)
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{/* add the local session to tree */
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proto_tree_add_uint( tree, hf_netb_local_ses_no, tvb, offset + NB_LOCAL_SES, 1,
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tvb_get_guint8( tvb, offset + NB_LOCAL_SES));
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}
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static void nb_remote_session( tvbuff_t *tvb, int offset, proto_tree *tree)
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{/* add the remote session to tree */
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proto_tree_add_uint( tree, hf_netb_remote_ses_no, tvb, offset + NB_RMT_SES, 1,
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tvb_get_guint8( tvb, offset + NB_RMT_SES));
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}
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static void nb_data2(char *label, int len, tvbuff_t *tvb, int offset,
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proto_tree *tree)
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{/* add the DATA2 to tree with format string = label and length of len */
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|
|
int value = (len == 1 ? tvb_get_guint8( tvb, offset + NB_DATA2)
|
|
: tvb_get_letohs( tvb, offset + NB_DATA2));
|
|
|
|
proto_tree_add_uint( tree, hf_netb_data2, tvb, offset + NB_DATA2, 2, value);
|
|
|
|
}
|
|
|
|
|
|
static void nb_resync_indicator( tvbuff_t *tvb, int offset, proto_tree *tree, char *cmd_str)
|
|
{
|
|
guint16 resync_indicator = tvb_get_letohs( tvb, offset + NB_DATA2);
|
|
|
|
|
|
switch (resync_indicator) {
|
|
|
|
case 0x0000:
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA2, 2,
|
|
"Re-sync indicator: No re-sync");
|
|
break;
|
|
|
|
case 0x0001:
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA2, 2,
|
|
"Re-sync indicator: First '%s' following 'Receive Outstanding'", cmd_str);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA2, 2,
|
|
"Re-sync indicator: 0x%04x", resync_indicator);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* */
|
|
/* The routines called by the top level to handle individual commands */
|
|
/* */
|
|
/************************************************************************/
|
|
|
|
static void dissect_netb_unknown( tvbuff_t *tvb, int offset, proto_tree *tree)
|
|
|
|
{/* Handle any unknow commands, do nothing */
|
|
|
|
/* call_dissector(data_handle, tvb_new_subset(tvb, offset + NB_COMMAND + 1,-1,tvb_reported_length_remaining(tvb,offset_NB_COMMAND + 1)), pinfo, tree); */
|
|
}
|
|
|
|
|
|
static void dissect_netb_add_group_name( tvbuff_t *tvb, 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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_add_name( tvbuff_t *tvb, 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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_name_in_conflict( tvbuff_t *tvb, 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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_status_query( tvbuff_t *tvb, 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_text(tree, tvb, offset + NB_DATA1, 1,
|
|
"Status request: NetBIOS 1.x or 2.0");
|
|
break;
|
|
|
|
case 1:
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA1, 1,
|
|
"Status request: NetBIOS 2.1, initial status request");
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA1, 1,
|
|
"Status request: NetBIOS 2.1, %u names received so far",
|
|
status_request);
|
|
break;
|
|
}
|
|
nb_data2("Length of status buffer: %u", 2, 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);
|
|
}
|
|
|
|
|
|
static u_char zeroes[10];
|
|
|
|
static void dissect_netb_datagram( tvbuff_t *tvb, 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 (memcmp( tvb_get_ptr( tvb,offset + NB_SENDER_NAME, 10), zeroes, 10) == 0) {
|
|
proto_tree_add_text( tree, tvb, offset + NB_SENDER_NAME + 10, 6,
|
|
"Sender's MAC Address: %s",
|
|
ether_to_str( tvb_get_ptr( tvb,offset + NB_SENDER_NAME + 10, 6)));
|
|
} else {
|
|
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
|
|
tree);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_netb_datagram_bcast( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the DATAGRAM BROADCAST command */
|
|
|
|
/* We assume the same weirdness can happen here.... */
|
|
if ( memcmp( tvb_get_ptr( tvb,offset + NB_SENDER_NAME + 10, 6), zeroes, 10) == 0) {
|
|
proto_tree_add_text( tree, tvb, offset + NB_SENDER_NAME + 10, 6,
|
|
"Sender's Node Address: %s",
|
|
ether_to_str( tvb_get_ptr( tvb,offset + NB_SENDER_NAME + 10, 6)));
|
|
} else {
|
|
netbios_add_name("Sender's Name", tvb, offset + NB_SENDER_NAME,
|
|
tree);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_netb_name_query( tvbuff_t *tvb, 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_text( tree, tvb, offset + NB_DATA2, 1,
|
|
"Local Session No.: 0 (FIND.NAME request)");
|
|
} else {
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 1,
|
|
"Local Session No.: 0x%02x", local_session_number);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_netb_add_name_resp( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the ADD NAME RESPONSE command */
|
|
guint8 status = tvb_get_guint8( tvb, offset + NB_DATA1);
|
|
guint16 name_type = tvb_get_letohs( tvb, offset + NB_DATA2);
|
|
|
|
switch (status) {
|
|
|
|
case 0:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA1, 1,
|
|
"Status: Add name not in process");
|
|
break;
|
|
|
|
case 1:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA1, 1,
|
|
"Status: Add name in process");
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA1, 1,
|
|
"Status: 0x%02x (should be 0 or 1)", status);
|
|
break;
|
|
}
|
|
|
|
switch (name_type) {
|
|
|
|
case 0:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Name type: Unique name");
|
|
break;
|
|
|
|
case 1:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Name type: Group name");
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Name type: 0x%04x (should be 0 or 1)", name_type);
|
|
break;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_name_resp( tvbuff_t *tvb, 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_text( tree, tvb, offset + NB_DATA2, 1,
|
|
"State of name: No LISTEN pending, or FIND.NAME response");
|
|
break;
|
|
|
|
case 0xFF:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 1,
|
|
"State of name: LISTEN pending, but insufficient resources to establish session");
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 1,
|
|
"Local Session No.: 0x%02x", local_session_number);
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_netb_status_resp( tvbuff_t *tvb, 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;
|
|
guint16 data2;
|
|
|
|
nb_call_name_type( tvb, offset, tree);
|
|
if (status_response == 0) {
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA1, 1,
|
|
"Status response: NetBIOS 1.x or 2.0");
|
|
} else {
|
|
proto_tree_add_text(tree, tvb, offset + NB_DATA1, 1,
|
|
"Status response: NetBIOS 2.1, %u names sent so far",
|
|
status_response);
|
|
}
|
|
data2 = tvb_get_letohs( tvb, offset + NB_DATA2);
|
|
|
|
td2 = proto_tree_add_text(tree, tvb, offset + NB_DATA2, 2, "Status: 0x%04x",
|
|
data2);
|
|
data2_tree = proto_item_add_subtree(td2, ett_netb_status);
|
|
if (data2 & 0x8000) {
|
|
proto_tree_add_text(data2_tree, tvb, offset, 2, "%s",
|
|
decode_boolean_bitfield(data2, 0x8000, 8*2,
|
|
"Data length exceeds maximum frame size", NULL));
|
|
}
|
|
if (data2 & 0x4000) {
|
|
proto_tree_add_text(data2_tree, tvb, offset, 2, "%s",
|
|
decode_boolean_bitfield(data2, 0x4000, 8*2,
|
|
"Data length exceeds user's buffer", NULL));
|
|
}
|
|
proto_tree_add_text(data2_tree, tvb, offset, 2, "%s",
|
|
decode_numeric_bitfield(data2, 0x3FFF, 2*8,
|
|
"Status data length = %u"));
|
|
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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_data_ack( tvbuff_t* tvb, 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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_data_first_middle( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the DATA FIRST MIDDLE command */
|
|
|
|
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);
|
|
nb_remote_session( tvb, offset, tree);
|
|
nb_local_session( tvb, offset, tree);
|
|
}
|
|
|
|
|
|
static void dissect_netb_data_only_last( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the DATA ONLY LAST command */
|
|
|
|
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);
|
|
nb_remote_session( tvb, offset, tree);
|
|
nb_local_session( tvb, offset, tree);
|
|
}
|
|
|
|
|
|
static void dissect_netb_session_confirm( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the SESSION CONFIRM command */
|
|
|
|
netbios_add_ses_confirm_flags( tvb, tree, offset + NB_FLAGS);
|
|
|
|
nb_data2("Max data recv size: %u", 2, 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);
|
|
}
|
|
|
|
|
|
static void dissect_netb_session_end( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the SESSION END command */
|
|
guint16 termination_indicator = tvb_get_letohs( tvb, offset + NB_DATA2);
|
|
|
|
switch (termination_indicator) {
|
|
|
|
case 0x0000:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Termination indicator: Normal session end");
|
|
break;
|
|
|
|
case 0x0001:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Termination indicator: Abormal session end");
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text( tree, tvb, offset + NB_DATA2, 2,
|
|
"Termination indicator: 0x%04x (should be 0x0000 or 0x0001)",
|
|
termination_indicator);
|
|
break;
|
|
}
|
|
|
|
nb_remote_session( tvb, offset, tree);
|
|
nb_local_session( tvb, offset, tree);
|
|
}
|
|
|
|
|
|
static void dissect_netb_session_init( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the SESSION INITIALIZE command */
|
|
|
|
netbios_add_session_init_flags( tvb, tree, offset + NB_FLAGS);
|
|
|
|
nb_data2("Max data recv size: %u", 2, 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);
|
|
}
|
|
|
|
static void dissect_netb_no_receive( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the NO RECEIVE command */
|
|
|
|
netbios_no_receive_flags( tvb, tree, offset + NB_FLAGS);
|
|
|
|
nb_data2("Number of data bytes accepted: %u", 2, tvb, offset, tree);
|
|
nb_remote_session( tvb, offset, tree);
|
|
nb_local_session( tvb, offset, tree);
|
|
}
|
|
|
|
|
|
static void dissect_netb_receive_outstanding( tvbuff_t *tvb, int offset,
|
|
proto_tree *tree)
|
|
|
|
{/* Handle the RECEIVE OUTSTANDING command */
|
|
|
|
nb_data2("Number of data bytes accepted: %u", 2, tvb, offset, tree);
|
|
nb_remote_session( tvb, offset, tree);
|
|
nb_local_session( tvb, offset, tree);
|
|
}
|
|
|
|
|
|
static void dissect_netb_receive_continue( tvbuff_t *tvb, 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);
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* */
|
|
/* The table routines called by the top level to handle commands */
|
|
/* */
|
|
/************************************************************************/
|
|
|
|
|
|
void (*dissect_netb[])(tvbuff_t *, 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_unknown, /* 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_unknown, /* 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_unknown, /* Session Alive 0x1f (nothing to do) */
|
|
dissect_netb_unknown,
|
|
};
|
|
|
|
static heur_dissector_list_t netbios_heur_subdissector_list;
|
|
|
|
void
|
|
dissect_netbios_payload(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/*
|
|
* 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))
|
|
call_dissector(data_handle,tvb, pinfo, tree);
|
|
}
|
|
|
|
static void
|
|
dissect_netbios(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
proto_tree *netb_tree;
|
|
proto_item *ti;
|
|
guint16 hdr_len, command;
|
|
char name[(NETBIOS_NAME_LEN - 1)*4 + 1];
|
|
int name_type;
|
|
tvbuff_t *next_tvb;
|
|
|
|
int offset = 0;
|
|
|
|
/* load the display labels */
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
col_set_str(pinfo->fd, 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)){
|
|
|
|
if (check_col( pinfo->fd, COL_INFO)) /* print bad packet */
|
|
col_set_str( pinfo->fd, COL_INFO, "Bad packet, no 0xEFFF marker");
|
|
|
|
return; /* this is an unknow 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 *));
|
|
|
|
if (check_col( pinfo->fd, COL_INFO)) { /* print command name */
|
|
switch ( command ) {
|
|
case NB_NAME_QUERY:
|
|
name_type = get_netbios_name( tvb, offset + 12, name);
|
|
col_add_fstr( pinfo->fd, COL_INFO, "%s for %s<%02x>",
|
|
CommandName[ command], 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);
|
|
col_add_fstr( pinfo->fd, COL_INFO, "%s - %s<%02x>",
|
|
CommandName[ command], name, name_type);
|
|
break;
|
|
|
|
default:
|
|
col_add_fstr( pinfo->fd, COL_INFO, "%s", CommandName[ command]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ( tree) {
|
|
ti = proto_tree_add_item(tree, proto_netbios, tvb, 0, hdr_len, FALSE);
|
|
netb_tree = proto_item_add_subtree(ti, ett_netb);
|
|
|
|
proto_tree_add_uint_format(netb_tree, hf_netb_hdr_len, tvb, offset, 2, hdr_len,
|
|
"Length: %d bytes", hdr_len);
|
|
|
|
proto_tree_add_text(netb_tree, tvb, offset + 2, 2,
|
|
"Delimiter: EFFF (NetBIOS)");
|
|
|
|
proto_tree_add_uint_format(netb_tree, hf_netb_cmd, tvb, offset + NB_COMMAND, 1, command,
|
|
"Command: 0x%02x (%s)", command, CommandName[ command]);
|
|
|
|
/* if command in table range */
|
|
if ( command < sizeof( dissect_netb)/ sizeof(void *))
|
|
|
|
/* branch to handle commands */
|
|
(dissect_netb[ command])( tvb, offset, netb_tree);
|
|
}
|
|
|
|
offset += hdr_len; /* move past header */
|
|
|
|
next_tvb = tvb_new_subset(tvb, offset, -1, -1);
|
|
dissect_netbios_payload(next_tvb, pinfo, tree);
|
|
}
|
|
|
|
|
|
void proto_register_netbios(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_netb,
|
|
&ett_netb_name,
|
|
&ett_netb_flags,
|
|
&ett_netb_status,
|
|
};
|
|
|
|
static hf_register_info hf_netb[] = {
|
|
{ &hf_netb_cmd,
|
|
{ "Command", "netbios.command", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_netb_hdr_len,
|
|
{ "Header Length", "netbios.hdr_len", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_xmit_corrl,
|
|
{ "Transmit Correlator", "netbios.xmit_corrl", FT_INT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_resp_corrl,
|
|
{ "Response Correlator", "netbios.resp_corrl", FT_INT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_netb_call_name_type,
|
|
{ "Call Name Type", "netbios.call_name_type", FT_INT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_netb_name_type,
|
|
{ "Netbios Name Type", "netbios.name_type", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_netb_name,
|
|
{ "Netbios Name", "netbios.name", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_ack,
|
|
{ "Acknowledge", "netbios.ack", FT_BOOLEAN, 8, TFS( &flags_set), 0x08,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_ack_with_data,
|
|
{ "Acknowledge with data", "netbios.ack_with_data", FT_BOOLEAN, 8, TFS( &flags_allowed), 0x04,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_ack_expected,
|
|
{ "Acknowledge expected", "netbios.ack_expected", FT_BOOLEAN, 8,
|
|
TFS( &flags_yes_no), 0x02, "", HFILL }},
|
|
|
|
{ &hf_netb_recv_cont_req,
|
|
{ "RECEIVE_CONTINUE requested", "netbios.recv_cont_req", FT_BOOLEAN, 8,
|
|
TFS( &flags_yes_no), 0x01, "", HFILL }},
|
|
|
|
{ &hf_netb_send_no_ack,
|
|
{ "Handle SEND.NO.ACK", "netbios.send_no_ack", FT_BOOLEAN, 8,
|
|
TFS( &flags_yes_no), 0x80, "", HFILL }},
|
|
|
|
{ &hf_netb_version,
|
|
{ "NetBIOS Version", "netbios.version", FT_BOOLEAN, 8,
|
|
TFS( &netb_version_str), 0x01, "", HFILL }},
|
|
|
|
{ &hf_netb_largest_frame,
|
|
{ "Largest Frame", "netbios.largest_frame", FT_UINT8, BASE_HEX, NULL, 0x0E,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_local_ses_no,
|
|
{ "Local Session No. ", "netbios.local_session", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_remote_ses_no,
|
|
{ "Remote Session No. ", "netbios.remote_session", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_netb_data2,
|
|
{ "DATA2 value ", "netbios.data2", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
};
|
|
|
|
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));
|
|
|
|
register_heur_dissector_list("netbios", &netbios_heur_subdissector_list);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_netbios(void)
|
|
{
|
|
dissector_handle_t netbios_handle;
|
|
|
|
netbios_handle = create_dissector_handle(dissect_netbios,
|
|
proto_netbios);
|
|
dissector_add("llc.dsap", SAP_NETBIOS, netbios_handle);
|
|
data_handle = find_dissector("data");
|
|
}
|