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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
local coroutine = require "coroutine"
local ipOps = require "ipOps"
local nmap = require "nmap"
local packet = require "packet"
local stdnse = require "stdnse"
local tab = require "tab"
local table = require "table"
local target = require "target"
description = [[
Sends an ICMPv6 echo request packet to the all-nodes link-local
multicast address (<code>ff02::1</code>) to discover responsive hosts
on a LAN without needing to individually ping each IPv6 address.
]]
---
-- @usage
-- ./nmap -6 --script=targets-ipv6-multicast-echo.nse --script-args 'newtargets,interface=eth0' -sL
-- @output
-- Pre-scan script results:
-- | targets-ipv6-multicast-echo:
-- | IP: 2001:0db8:0000:0000:0000:0000:0000:0001 MAC: 11:22:33:44:55:66 IFACE: eth0
-- |_ Use --script-args=newtargets to add the results as targets
-- @args newtargets If true, add discovered targets to the scan queue.
-- @args targets-ipv6-multicast-echo.interface The interface to use for host discovery.
author = {"David Fifield", "Xu Weilin"}
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery","broadcast"}
prerule = function()
return nmap.is_privileged()
end
local function get_interfaces()
local interface_name = stdnse.get_script_args(SCRIPT_NAME .. ".interface")
or nmap.get_interface()
-- interfaces list (decide which interfaces to broadcast on)
local interfaces = {}
if interface_name then
-- single interface defined
local if_table = nmap.get_interface_info(interface_name)
if if_table and ipOps.ip_to_str(if_table.address) and if_table.link == "ethernet" then
interfaces[#interfaces + 1] = if_table
else
stdnse.debug1("Interface not supported or not properly configured.")
end
else
for _, if_table in ipairs(nmap.list_interfaces()) do
if ipOps.ip_to_str(if_table.address) and if_table.link == "ethernet" then
table.insert(interfaces, if_table)
end
end
end
return interfaces
end
local function single_interface_broadcast(if_nfo, results)
stdnse.debug1("Starting " .. SCRIPT_NAME .. " on " .. if_nfo.device)
local condvar = nmap.condvar(results)
local src_mac = if_nfo.mac
local src_ip6 = ipOps.ip_to_str(if_nfo.address)
local dst_mac = packet.mactobin("33:33:00:00:00:01")
local dst_ip6 = ipOps.ip_to_str("ff02::1")
----------------------------------------------------------------------------
--Multicast echo ping probe
local dnet = nmap.new_dnet()
local pcap = nmap.new_socket()
local function catch ()
dnet:ethernet_close()
pcap:pcap_close()
end
local try = nmap.new_try(catch)
try(dnet:ethernet_open(if_nfo.device))
pcap:pcap_open(if_nfo.device, 128, false, "icmp6 and ip6[6:1] = 58 and ip6[40:1] = 129")
local probe = packet.Frame:new()
probe.mac_src = src_mac
probe.mac_dst = dst_mac
probe.ip_bin_src = src_ip6
probe.ip_bin_dst = dst_ip6
probe.echo_id = 5
probe.echo_seq = 6
probe.echo_data = "Nmap host discovery."
probe:build_icmpv6_echo_request()
probe:build_icmpv6_header()
probe:build_ipv6_packet()
probe:build_ether_frame()
try(dnet:ethernet_send(probe.frame_buf))
pcap:set_timeout(1000)
local pcap_timeout_count = 0
local nse_timeout = 5
local start_time = nmap:clock()
local cur_time = nmap:clock()
repeat
local status, length, layer2, layer3 = pcap:pcap_receive()
cur_time = nmap:clock()
if not status then
pcap_timeout_count = pcap_timeout_count + 1
else
local reply = packet.Frame:new(layer2..layer3)
if reply.mac_dst == src_mac then
local target_str = reply.ip_src
if not results[target_str] then
if target.ALLOW_NEW_TARGETS then
target.add(target_str)
end
results[#results + 1] = { address = target_str, mac = stdnse.format_mac(reply.mac_src), iface = if_nfo.device }
results[target_str] = true
end
end
end
until pcap_timeout_count >= 2 or cur_time - start_time >= nse_timeout
dnet:ethernet_close()
pcap:pcap_close()
condvar("signal")
end
local function format_output(results)
local output = tab.new()
for _, record in ipairs(results) do
tab.addrow(output, "IP: " .. record.address, "MAC: " .. record.mac, "IFACE: " .. record.iface)
end
if #results > 0 then
output = { tab.dump(output) }
if not target.ALLOW_NEW_TARGETS then
output[#output + 1] = "Use --script-args=newtargets to add the results as targets"
end
return stdnse.format_output(true, output)
end
end
action = function()
local threads = {}
local results = {}
local condvar = nmap.condvar(results)
for _, if_nfo in ipairs(get_interfaces()) do
-- create a thread for each interface
local co = stdnse.new_thread(single_interface_broadcast, if_nfo, results)
threads[co] = true
end
repeat
for thread in pairs(threads) do
if coroutine.status(thread) == "dead" then threads[thread] = nil end
end
if ( next(threads) ) then
condvar "wait"
end
until next(threads) == nil
return format_output(results)
end
|
