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local bin = require "bin"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
description = [[
Connects to Erlang Port Mapper Daemon (epmd) and retrieves a list of nodes with their respective port numbers.
]]
---
-- @usage
-- nmap -p 4369 --script epmd-info <target>
--
-- @output
-- PORT STATE SERVICE
-- 4369/tcp open epmd
-- | epmd-info.nse:
-- | epmd running on port 4369
-- | name rabbit at port 36804
-- |_ name ejabberd at port 46540
author = "Toni Ruottu"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
portrule = shortport.port_or_service (4369, "epmd")
local NAMESREQ = 110
action = function(host, port)
local socket = nmap.new_socket()
local status, err = socket:connect(host.ip, port.number)
if not status then
return {}
end
local payload = bin.pack("C", NAMESREQ)
local probe = bin.pack(">SA", #payload, payload)
socket:send(probe)
local status = true
local data = ""
local tmp = ""
while status do
data = data .. tmp
status, tmp = socket:receive()
end
local pos, realport = bin.unpack(">I", data)
local nodestring = string.sub(data, pos, -2)
local nodes = stdnse.strsplit("\n", nodestring)
local response = {}
table.insert(response, 'epmd running on port ' .. realport)
for _, node in ipairs(nodes) do
table.insert(response, node)
end
return stdnse.format_output(true, response)
end