1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
local nmap = require "nmap"
local shortport = require "shortport"
local ipOps = require "ipOps"
local stdnse = require "stdnse"
local string = require "string"
local knx = require "knx"
description = [[
Identifies a KNX gateway on UDP port 3671 by sending a KNX Description Request.
Further information:
* DIN EN 13321-2
* http://www.knx.org/
]]
author = {"Niklaus Schiess <nschiess@ernw.de>", "Dominik Schneider <dschneider@ernw.de>"}
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
portrule = shortport.port_or_service(3671, "efcp", "udp")
---
--@output
-- 3671/udp open|filtered efcp
-- | knx-gateway-info:
-- | Body:
-- | DIB_DEV_INFO:
-- | KNX address: 15.15.255
-- | Decive serial: 00ef2650065c
-- | Multicast address: 0.0.0.0
-- | Device friendly name: IP-Viewer
-- | DIB_SUPP_SVC_FAMILIES:
-- | KNXnet/IP Core version 1
-- | KNXnet/IP Device Management version 1
-- | KNXnet/IP Tunneling version 1
-- |_ KNXnet/IP Object Server version 1
--
local fam_meta = {
__tostring = function (self)
return ("%s version %d"):format(
knx.knxServiceFamilies[self.service_id] or self.service_id,
self.Version
)
end
}
--- Parse a Description Response
-- @param knxMessage UDP response packet
local knxParseDescriptionResponse = function(knxMessage)
local knx_header_length, knx_protocol_version, knx_service_type, knx_total_length, pos = knx.parseHeader(knxMessage)
if not knx_header_length then
stdnse.debug1("KNX header error: %s", knx_protocol_version)
return
end
local message_format = '>BBB c1 I2 c2 c6 c4 c6 c30 BB'
if #knxMessage - pos + 1 < string.packsize(message_format) then
stdnse.debug1("Message too short for KNX message")
return
end
local knx_dib_structure_length,
knx_dib_description_type,
knx_dib_knx_medium,
knx_dib_device_status,
knx_dib_knx_address,
knx_dib_project_install_ident,
knx_dib_dev_serial,
knx_dib_dev_multicast_addr,
knx_dib_dev_mac,
knx_dib_dev_friendly_name,
knx_supp_svc_families_structure_length,
knx_supp_svc_families_description, pos = string.unpack(message_format, knxMessage, pos)
knx_dib_description_type = knx.knxDibDescriptionTypes[knx_dib_description_type]
knx_dib_knx_medium = knx.knxMediumTypes[knx_dib_knx_medium]
knx_dib_dev_multicast_addr = ipOps.str_to_ip(knx_dib_dev_multicast_addr)
knx_dib_dev_mac = stdnse.format_mac(knx_dib_dev_mac)
local knx_supp_svc_families = {}
knx_supp_svc_families_description = knx.knxDibDescriptionTypes[knx_supp_svc_families_description] or knx_supp_svc_families_description
for i=0,(knx_total_length - pos),2 do
local family = {}
family.service_id, family.Version, pos = string.unpack('BB', knxMessage, pos)
setmetatable(family, fam_meta)
knx_supp_svc_families[#knx_supp_svc_families+1] = family
end
--Build a proper response table
local description_response = stdnse.output_table()
if nmap.debugging() > 0 then
description_response.Header = stdnse.output_table()
description_response.Header["Header length"] = knx_header_length
description_response.Header["Protocol version"] = knx_protocol_version
description_response.Header["Service type"] = "DESCRIPTION_RESPONSE (0x0204)"
description_response.Header["Total length"] = knx_total_length
description_response.Body = stdnse.output_table()
description_response.Body.DIB_DEV_INFO = stdnse.output_table()
description_response.Body.DIB_DEV_INFO["Description type"] = knx_dib_description_type
description_response.Body.DIB_DEV_INFO["KNX medium"] = knx_dib_knx_medium
description_response.Body.DIB_DEV_INFO["Device status"] = stdnse.tohex(knx_dib_device_status)
description_response.Body.DIB_DEV_INFO["KNX address"] = knx.parseKnxAddress(knx_dib_knx_address)
description_response.Body.DIB_DEV_INFO["Project installation identifier"] = stdnse.tohex(knx_dib_project_install_ident)
description_response.Body.DIB_DEV_INFO["Decive serial"] = stdnse.tohex(knx_dib_dev_serial)
description_response.Body.DIB_DEV_INFO["Multicast address"] = knx_dib_dev_multicast_addr
description_response.Body.DIB_DEV_INFO["Device MAC address"] = knx_dib_dev_mac
description_response.Body.DIB_DEV_INFO["Device friendly name"] = knx_dib_dev_friendly_name
description_response.Body.DIB_SUPP_SVC_FAMILIES = knx_supp_svc_families
else
description_response.Body = stdnse.output_table()
description_response.Body.DIB_DEV_INFO = stdnse.output_table()
description_response.Body.DIB_DEV_INFO["KNX address"] = knx.parseKnxAddress(knx_dib_knx_address)
description_response.Body.DIB_DEV_INFO["Decive serial"] = stdnse.tohex(knx_dib_dev_serial)
description_response.Body.DIB_DEV_INFO["Multicast address"] = knx_dib_dev_multicast_addr
description_response.Body.DIB_DEV_INFO["Device friendly name"] = knx_dib_dev_friendly_name
description_response.Body.DIB_SUPP_SVC_FAMILIES = knx_supp_svc_families
end
return description_response
end
action = function(host, port)
local sock = nmap.new_socket()
local status, err = sock:connect(host, port)
if not status then
stdnse.debug1("Connect failed: %s", err)
return
end
local _, lhost, lport, _, _ = sock:get_info()
sock:send(knx.query(0x0203, lhost, lport))
local status, data = sock:receive()
if not status then
stdnse.debug("Receive failed: %s", err)
sock:close()
return
end
sock:close()
return knxParseDescriptionResponse(data)
end
|
