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local nmap = require "nmap"
local shortport = require "shortport"
local stun = require "stun"
description = [[
Sends a binding request to the server and attempts to extract version
information from the response, if the server attribute is present.
]]
---
-- @output
-- PORT STATE SERVICE VERSION
-- 3478/udp open stun Vovida.org 0.96
--
author = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"version"}
portrule = shortport.version_port_or_service(3478, "stun", "udp")
local function fail(err) return ("\n ERROR: %s"):format(err or "") end
action = function(host, port)
local helper = stun.Helper:new(host, port)
local status = helper:connect()
if ( not(status) ) then
return fail("Failed to connect to server")
end
local status, result = helper:getVersion()
if ( not(status) ) then
return fail("Failed to retrieve external IP")
end
port.version.name = "stun"
port.version.product = result
nmap.set_port_state(host, port, "open")
nmap.set_port_version(host, port)
end