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/* packet-mbtcp.h
*
* Routines for Modbus/TCP dissection
* By Riaan Swart <rswart@cs.sun.ac.za>
* Copyright 2001, Institute for Applied Computer Science
* University of Stellenbosch
*
* See http://www.modbus.org/ for information on Modbus/TCP.
*
* 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.
*/
#define PORT_MBTCP 502 /* Modbus/TCP located on port 502, with IANA registration */
#define PORT_MBRTU 0 /* Modbus RTU over TCP does not have a standard port, default to zero */
/* Modbus protocol function codes */
#define READ_COILS 1
#define READ_DISCRETE_INPUTS 2
#define READ_HOLDING_REGS 3
#define READ_INPUT_REGS 4
#define WRITE_SINGLE_COIL 5
#define WRITE_SINGLE_REG 6
#define READ_EXCEPT_STAT 7
#define DIAGNOSTICS 8
#define GET_COMM_EVENT_CTRS 11
#define GET_COMM_EVENT_LOG 12
#define WRITE_MULT_COILS 15
#define WRITE_MULT_REGS 16
#define REPORT_SLAVE_ID 17
#define READ_FILE_RECORD 20
#define WRITE_FILE_RECORD 21
#define MASK_WRITE_REG 22
#define READ_WRITE_REG 23
#define READ_FIFO_QUEUE 24
#define ENCAP_INTERFACE_TRANSP 43
/* Modbus protocol exception codes */
#define ILLEGAL_FUNCTION 0x01
#define ILLEGAL_ADDRESS 0x02
#define ILLEGAL_VALUE 0x03
#define SLAVE_FAILURE 0x04
#define ACKNOWLEDGE 0x05
#define SLAVE_BUSY 0x06
#define MEMORY_ERR 0x08
#define GATEWAY_UNAVAILABLE 0x0a
#define GATEWAY_TRGT_FAIL 0x0b
/* Modbus diagnostic subfunction codes */
#define RETURN_QUERY_DATA 0x00
#define RESTART_COMMUNICATION_OPTION 0x01
#define RETURN_DIAGNOSTIC_REGISTER 0x02
#define CHANGE_ASCII_INPUT_DELIMITER 0x03
#define FORCE_LISTEN_ONLY_MODE 0x04
#define CLEAR_COUNTERS_AND_DIAG_REG 0x0A
#define RETURN_BUS_MESSAGE_COUNT 0x0B
#define RETURN_BUS_COMM_ERROR_COUNT 0x0C
#define RETURN_BUS_EXCEPTION_ERROR_COUNT 0x0D
#define RETURN_SLAVE_MESSAGE_COUNT 0x0E
#define RETURN_SLAVE_NO_RESPONSE_COUNT 0x0F
#define RETURN_SLAVE_NAK_COUNT 0x10
#define RETURN_SLAVE_BUSY_COUNT 0x11
#define RETURN_BUS_CHAR_OVERRUN_COUNT 0x12
#define CLEAR_OVERRUN_COUNTER_AND_FLAG 0x14
/* Encapsulation Interface codes */
#define CANOPEN_REQ_RESP 0x0D
#define READ_DEVICE_ID 0x0E
/* Event byte codes */
#define REMOTE_DEVICE_RECV_EVENT_MASK 0x80
#define REMOTE_DEVICE_SEND_EVENT_MASK 0xc0
#define REMOTE_DEVICE_SEND_EVENT_VALUE 0x40
/* return codes of function classifying packets as query/response */
#define QUERY_PACKET 0
#define RESPONSE_PACKET 1
#define CANNOT_CLASSIFY 2
#define MODBUS_PROTOCOL_ID 0
/* Preferences for Modbus/TCP Dissector */
#define MBTCP_PREF_REGISTER_FORMAT_UINT16 0
#define MBTCP_PREF_REGISTER_FORMAT_UINT32 1
#define MBTCP_PREF_REGISTER_FORMAT_IEEE_FLOAT 2
#define MBTCP_PREF_REGISTER_FORMAT_MODICON_FLOAT 3
#define MBTCP_PREF_REGISTER_ADDR_RAW 0
#define MBTCP_PREF_REGISTER_ADDR_MOD5 1
#define MBTCP_PREF_REGISTER_ADDR_MOD6 2
typedef struct {
guint8 register_format;
guint8 register_addr_type;
guint8 packet_type;
} modbus_request_info_t;
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