132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
/* packet-mbtcp.h
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*
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* Routines for Modbus/TCP dissection
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* By Riaan Swart <rswart@cs.sun.ac.za>
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* Copyright 2001, Institute for Applied Computer Science
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* University of Stellenbosch
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*
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* See http://www.modbus.org/ for information on Modbus/TCP.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define PORT_MBTCP 502 /* Modbus/TCP located on port 502, with IANA registration */
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#define PORT_MBRTU 0 /* Modbus RTU over TCP does not have a standard port, default to zero */
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/* Modbus protocol function codes */
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#define READ_COILS 1
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#define READ_DISCRETE_INPUTS 2
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#define READ_HOLDING_REGS 3
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#define READ_INPUT_REGS 4
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#define WRITE_SINGLE_COIL 5
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#define WRITE_SINGLE_REG 6
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#define READ_EXCEPT_STAT 7
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#define DIAGNOSTICS 8
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#define GET_COMM_EVENT_CTRS 11
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#define GET_COMM_EVENT_LOG 12
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#define WRITE_MULT_COILS 15
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#define WRITE_MULT_REGS 16
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#define REPORT_SLAVE_ID 17
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#define READ_FILE_RECORD 20
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#define WRITE_FILE_RECORD 21
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#define MASK_WRITE_REG 22
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#define READ_WRITE_REG 23
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#define READ_FIFO_QUEUE 24
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#define ENCAP_INTERFACE_TRANSP 43
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#define UNITY_SCHNEIDER 90
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/* Modbus protocol exception codes */
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#define ILLEGAL_FUNCTION 0x01
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#define ILLEGAL_ADDRESS 0x02
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#define ILLEGAL_VALUE 0x03
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#define SLAVE_FAILURE 0x04
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#define ACKNOWLEDGE 0x05
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#define SLAVE_BUSY 0x06
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#define MEMORY_ERR 0x08
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#define GATEWAY_UNAVAILABLE 0x0a
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#define GATEWAY_TRGT_FAIL 0x0b
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/* Modbus diagnostic subfunction codes */
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#define RETURN_QUERY_DATA 0x00
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#define RESTART_COMMUNICATION_OPTION 0x01
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#define RETURN_DIAGNOSTIC_REGISTER 0x02
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#define CHANGE_ASCII_INPUT_DELIMITER 0x03
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#define FORCE_LISTEN_ONLY_MODE 0x04
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#define CLEAR_COUNTERS_AND_DIAG_REG 0x0A
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#define RETURN_BUS_MESSAGE_COUNT 0x0B
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#define RETURN_BUS_COMM_ERROR_COUNT 0x0C
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#define RETURN_BUS_EXCEPTION_ERROR_COUNT 0x0D
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#define RETURN_SLAVE_MESSAGE_COUNT 0x0E
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#define RETURN_SLAVE_NO_RESPONSE_COUNT 0x0F
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#define RETURN_SLAVE_NAK_COUNT 0x10
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#define RETURN_SLAVE_BUSY_COUNT 0x11
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#define RETURN_BUS_CHAR_OVERRUN_COUNT 0x12
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#define CLEAR_OVERRUN_COUNTER_AND_FLAG 0x14
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/* Encapsulation Interface codes */
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#define CANOPEN_REQ_RESP 0x0D
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#define READ_DEVICE_ID 0x0E
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/* Event byte codes */
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#define REMOTE_DEVICE_RECV_EVENT_MASK 0x80
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#define REMOTE_DEVICE_SEND_EVENT_MASK 0xc0
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#define REMOTE_DEVICE_SEND_EVENT_VALUE 0x40
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/* return codes of function classifying packets as query/response */
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#define QUERY_PACKET 0
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#define RESPONSE_PACKET 1
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#define CANNOT_CLASSIFY 2
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#define MODBUS_PROTOCOL_ID 0
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/* Preferences for Modbus/TCP Dissector */
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#define MODBUS_PREF_REGISTER_FORMAT_UINT16 0
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#define MODBUS_PREF_REGISTER_FORMAT_UINT32 1
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#define MODBUS_PREF_REGISTER_FORMAT_IEEE_FLOAT 2
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#define MODBUS_PREF_REGISTER_FORMAT_MODICON_FLOAT 3
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#define MODBUS_PREF_REGISTER_FORMAT_INT16 4
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#define MODBUS_PREF_REGISTER_FORMAT_INT32 5
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typedef struct {
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guint32 fnum;
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guint8 function_code;
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guint16 base_address;
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guint16 num_reg;
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} modbus_request_info_t;
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/* List contains request data */
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typedef struct {
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wmem_list_t *modbus_request_frame_data;
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gint register_format;
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} modbus_conversation;
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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