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local dnssd = require "dnssd"
local stdnse = require "stdnse"
description=[[
Attempts to discover hosts' services using the DNS Service Discovery protocol. It sends a multicast DNS-SD query and collects all the responses.
The script first sends a query for _services._dns-sd._udp.local to get a
list of services. It then sends a followup query for each one to try to
get more information.
]]
---
-- @usage
-- nmap --script=broadcast-dns-service-discovery
--
-- @output
-- | broadcast-dns-service-discovery:
-- | 1.2.3.1
-- | _ssh._tcp.local
-- | _http._tcp.local
-- | 1.2.3.50
-- | 22/tcp ssh
-- | org.freedesktop.Avahi.cookie=2292090182
-- | Address=1.2.3.50
-- | 80/tcp http
-- | path=/admin
-- | org.freedesktop.Avahi.cookie=2292090182
-- | path=/
-- | org.freedesktop.Avahi.cookie=2292090182
-- | path=/pim
-- | org.freedesktop.Avahi.cookie=2292090182
-- | Address=1.2.3.50
-- | 1.2.3.116
-- | 80/tcp http
-- |_ Address=1.2.3.116
-- Version 0.1
-- Created 10/29/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"broadcast", "safe"}
prerule = function() return true end
action = function()
local helper = dnssd.Helper:new( )
helper:setMulticast(true)
local status, result = helper:queryServices()
if ( status ) then
return stdnse.format_output(true, result)
end
end
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