122 Zeilen
4.0 KiB
Lua
122 Zeilen
4.0 KiB
Lua
--[[
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Z21 protocol dissector for WireShark
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Copyright (c) 2019 Reinder Feenstra
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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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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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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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local default_settings =
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{
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port = 21105
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}
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local LAN_GET_SERIAL_NUMBER = 0x10
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local LAN_GET_CODE = 0x18
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local LAN_GET_HWINFO = 0x1a
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local LAN_LOGOFF = 0x30
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local LAN_X = 0x40
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local LAN_SET_BROADCASTFLAGS = 0x50
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local LAN_GET_BROADCASTFLAGS = 0x51
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local LAN_GET_LOCOMODE = 0x60
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local LAN_SET_LOCOMODE = 0x61
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local LAN_GET_TURNOUTMODE = 0x70
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local LAN_SET_TURNOUTMODE = 0x71
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local LAN_RMBUS_GETDATA = 0x81
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local LAN_RMBUS_PROGRAMMODULE = 0x82
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local LAN_SYSTEMSTATE_GETDATA = 0x85
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local LAN_RAILCOM_GETDATA = 0x89
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local LAN_LOCONET_FROM_LAN = 0xa2
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local LAN_LOCONET_DISPATCH_ADDR = 0xa3
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local LAN_LOCONET_DETECTOR = 0xa4
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local LAN_CAN_DETECTOR = 0xc4
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local header_values =
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{
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[LAN_GET_SERIAL_NUMBER] = "LAN_GET_SERIAL_NUMBER",
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[LAN_GET_CODE] = "LAN_GET_CODE",
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[LAN_GET_HWINFO] = "LAN_GET_HWINFO",
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[LAN_LOGOFF] = "LAN_LOGOFF",
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[LAN_X] = "LAN_X",
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[LAN_SET_BROADCASTFLAGS] = "LAN_SET_BROADCASTFLAGS",
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[LAN_GET_BROADCASTFLAGS] = "LAN_GET_BROADCASTFLAGS",
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[LAN_GET_LOCOMODE] = "LAN_GET_LOCOMODE",
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[LAN_SET_LOCOMODE] = "LAN_SET_LOCOMODE",
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[LAN_GET_TURNOUTMODE] = "LAN_GET_TURNOUTMODE",
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[LAN_SET_TURNOUTMODE] = "LAN_SET_TURNOUTMODE",
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[LAN_RMBUS_GETDATA] = "LAN_RMBUS_GETDATA",
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[LAN_RMBUS_PROGRAMMODULE] = "LAN_RMBUS_PROGRAMMODULE",
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[LAN_SYSTEMSTATE_GETDATA] = "LAN_SYSTEMSTATE_GETDATA",
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[LAN_RAILCOM_GETDATA] = "LAN_RAILCOM_GETDATA",
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[LAN_LOCONET_FROM_LAN] = "LAN_LOCONET_FROM_LAN",
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[LAN_LOCONET_DISPATCH_ADDR] = "LAN_LOCONET_DISPATCH_ADDR",
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[LAN_LOCONET_DETECTOR] = "LAN_LOCONET_DETECTOR",
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[LAN_CAN_DETECTOR] = "LAN_CAN_DETECTOR",
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}
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local z21 = Proto("z21", "Z21 protocol")
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local pf_data_len = ProtoField.uint16("z21.data_len", "DataLen", base.HEX)
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local pf_header = ProtoField.uint16("z21.data_len", "Header", base.HEX, header_values)
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local pf_data = ProtoField.bytes("z21.data", "Data")
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--[[
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local pf_type = ProtoField.uint8("z21.flags.type", "Type", base.DEC, flag_types, 0xc0)
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local pf_errorcode = ProtoField.uint8("z21.error_code", "Error code", base.DEC, nil, 0x3f)
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local pf_requestid = ProtoField.uint16("z21.request_id", "Request id")
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local pf_datasize = ProtoField.uint32("z21.data_size", "Data size")
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local pf_data = ProtoField.bytes("z21.data", "Data")
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]]
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z21.fields = {
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pf_data_len,
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pf_header,
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pf_data,
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}
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z21.prefs.port = Pref.uint("Port number", default_settings.port, "The UDP port number for Z21 protocol")
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function z21.prefs_changed()
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if default_settings.port ~= z21.prefs.port then
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if default_settings.port ~= 0 then
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DissectorTable.get("udp.port"):remove(default_settings.port, z21)
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end
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default_settings.port = z21.prefs.port
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if default_settings.port ~= 0 then
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DissectorTable.get("udp.port"):add(default_settings.port, z21)
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end
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end
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end
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function z21.dissector(tvbuf, pktinfo, root)
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pktinfo.cols.protocol:set("Z21")
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while tvbuf:reported_length_remaining() >= 4 do
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local data_len = tvbuf:range(0, 2)
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local tree = root:add(z21, tvbuf:range(0, data_len:le_uint()))
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tree:add_le(pf_data_len, data_len)
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tree:add_le(pf_header, tvbuf:range(2, 2))
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if data_len:le_uint() > 4 then
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tree:add(pf_data, tvbuf:range(4, data_len:le_uint() - 4))
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end
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tvbuf = tvbuf:range(data_len:le_uint()):tvb()
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end
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end
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DissectorTable.get("udp.port"):add(default_settings.port, z21)
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