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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ--- A UPNP library based on code from upnp-info initially written by -- Thomas Buchanan. The code was factored out from upnp-info and partly -- re-written by Patrik Karlsson in order to support -- multicast requests. -- -- The library supports sending UPnP requests and decoding the responses -- -- The library contains the following classes -- * Comm -- ** A class that handles communication with the UPnP service -- * Helper -- ** The helper class wraps the Comm class using functions with a more descriptive name. -- * Util -- ** The Util class contains a number of static functions mainly used to convert and sort data. -- -- The following code snippet queries all UPnP services on the network: -- -- local helper = upnp.Helper:new() -- helper:setMulticast(true) -- return stdnse.format_output(helper:queryServices()) -- -- -- This next snippet queries a specific host for the same information: -- -- local helper = upnp.Helper:new(host, port) -- return stdnse.format_output(helper:queryServices()) -- -- -- -- @author Thomas Buchanan -- @author Patrik Karlsson -- -- Version 0.1 -- local http = require "http" local ipOps = require "ipOps" local nmap = require "nmap" local stdnse = require "stdnse" local string = require "string" local table = require "table" local target = require "target" _ENV = stdnse.module("upnp", stdnse.seeall) Util = { --- Compare function used for sorting IP-addresses -- -- @param a table containing first item -- @param b table containing second item -- @return true if a is less than b ipCompare = function(a, b) return ipOps.compare_ip(a, "lt", b) end, } Comm = { --- Creates a new Comm instance -- -- @param host string containing the host name or ip -- @param port number containing the port to connect to -- @return o a new instance of Comm new = function( self, host, port ) local o = {} setmetatable(o, self) self.__index = self o.host = host o.port = port o.mcast = false return o end, --- Connect to the server -- -- @return status true on success, false on failure connect = function( self ) if ( self.mcast ) then self.socket = nmap.new_socket("udp") self.socket:set_timeout(5000) else self.socket = nmap.new_socket() self.socket:set_timeout(5000) local status, err = self.socket:connect(self.host, self.port, "udp" ) if ( not(status) ) then return false, err end end return true end, --- Send the UPNP discovery request to the server -- -- @return status true on success, false on failure sendRequest = function( self ) -- for details about the UPnP message format, see http://upnp.org/resources/documents.asp local payload = 'M-SEARCH * HTTP/1.1\r\n\z Host:239.255.255.250:1900\r\n\z ST:upnp:rootdevice\r\n\z Man:"ssdp:discover"\r\n\z MX:3\r\n\r\n' local status, err if ( self.mcast ) then status, err = self.socket:sendto( self.host, self.port, payload ) else status, err = self.socket:send( payload ) end if ( not(status) ) then return false, err end return true end, --- Receives one or multiple UPNP responses depending on whether -- setBroadcast was enabled or not. -- -- The function returns the -- status and a response containing: -- * an array (table) of responses if broadcast is used -- * a single response if broadcast is not in use -- * an error message if status was false -- -- @return status true on success, false on failure -- @return result table or string containing results or error message -- on failure. receiveResponse = function( self ) local status, response local result = {} local host_responses = {} repeat status, response = self.socket:receive() if ( not(status) and #response == 0 ) then return false, response elseif( not(status) ) then break end local status, _, _, ip, _ = self.socket:get_info() if ( not(status) ) then return false, "Failed to retrieve socket information" end if target.ALLOW_NEW_TARGETS then target.add(ip) end if ( not(host_responses[ip]) ) then local status, output = self:decodeResponse( response ) if ( not(status) ) then return false, "Failed to decode UPNP response" end output = { output } output.name = ip table.insert( result, output ) host_responses[ip] = true end until ( not( self.mcast ) ) if ( self.mcast ) then table.sort(result, Util.ipCompare) return true, result end if ( status and #result > 0 ) then return true, result[1] else return false, "Received no responses" end end, --- Processes a response from a upnp device -- -- @param response as received over the socket -- @return status boolean true on success, false on failure -- @return response table or string suitable for output or error message if status is false decodeResponse = function( self, response ) local output = {} if response ~= nil then -- We should get a response back that has contains one line for the server, and one line for the xml file location -- these match any combination of upper and lower case responses local server, location server = string.match(response, "[Ss][Ee][Rr][Vv][Ee][Rr]:%s*(.-)\r?\n") if server ~= nil then table.insert(output, "Server: " .. server ) end location = string.match(response, "[Ll][Oo][Cc][Aa][Tt][Ii][Oo][Nn]:%s*(.-)\r?\n") if location ~= nil then table.insert(output, "Location: " .. location ) local v = nmap.verbosity() -- the following check can output quite a lot of information, so we require at least one -v flag if v > 0 then local status, result = self:retrieveXML( location ) if status then table.insert(output, result) end end end if #output > 0 then return true, output else return false, "Could not decode response" end end end, --- Retrieves the XML file that describes the UPNP device -- -- @param location string containing the location of the XML file from the UPNP response -- @return status boolean true on success, false on failure -- @return response table or string suitable for output or error message if status is false retrieveXML = function( self, location ) local response local options = {} options['header'] = {} options['header']['Accept'] = "text/xml, application/xml, text/html" -- if we're in multicast mode, or if the user doesn't want us to override the IP address, -- just use the HTTP library to grab the XML file if ( self.mcast or ( not self.override ) ) then response = http.get_url( location, options ) else -- otherwise, split the location into an IP address, port, and path name for the xml file local xhost, xport, xfile xhost = string.match(location, "http://(.-)/") -- check to see if the host portion of the location specifies a port -- if not, use port 80 as a standard web server port if xhost ~= nil and string.match(xhost, ":") then xport = string.match(xhost, ":(.*)") xhost = string.match(xhost, "(.*):") end -- check to see if the IP address returned matches the IP address we scanned if xhost ~= self.host.ip then stdnse.debug1("IP addresses did not match! Found %s, using %s instead.", xhost, self.host.ip) xhost = self.host.ip end if xport == nil then xport = 80 end -- extract the path name from the location field, but strip off the \r that HTTP servers return xfile = string.match(location, "http://.-(/.-)\013") if xfile ~= nil then response = http.get( xhost, xport, xfile, options ) end end if response ~= nil then local output = {} -- extract information about the webserver that is handling responses for the UPnP system local webserver = response['header']['server'] if webserver ~= nil then table.insert(output, "Webserver: " .. webserver) end -- the schema for UPnP includes a number of entries, which can a number of interesting fields for device in string.gmatch(response['body'], "(.-)") do local fn, mnf, mdl, nm, ver fn = string.match(device, "(.-)") mnf = string.match(device, "(.-)") mdl = string.match(device, "(.-)") nm = string.match(device, "(.-)") ver = string.match(device, "(.-)") if fn ~= nil then table.insert(output, "Name: " .. fn) end if mnf ~= nil then table.insert(output,"Manufacturer: " .. mnf) end if mdl ~= nil then table.insert(output,"Model Descr: " .. mdl) end if nm ~= nil then table.insert(output,"Model Name: " .. nm) end if ver ~= nil then table.insert(output,"Model Version: " .. ver) end end return true, output else return false, "Could not retrieve XML file" end end, --- Enables or disables multicast support -- -- @param mcast boolean true if multicast is to be used, false otherwise setMulticast = function( self, mcast ) assert( type(mcast)=="boolean", "mcast has to be either true or false") self.mcast = mcast local family = nmap.address_family() self.host = (family=="inet6" and "FF02::C" or "239.255.255.250") self.port = 1900 end, --- Closes the socket close = function( self ) self.socket:close() end } Helper = { --- Creates a new helper instance -- -- @param host string containing the host name or ip -- @param port number containing the port to connect to -- @return o a new instance of Helper new = function( self, host, port ) local o = {} setmetatable(o, self) self.__index = self o.comm = Comm:new( host, port ) return o end, --- Enables or disables multicast support -- -- @param mcast boolean true if multicast is to be used, false otherwise setMulticast = function( self, mcast ) self.comm:setMulticast(mcast) end, --- Enables or disables whether the script will override the IP address is the Location URL -- -- @param override boolean true if override is to be enabled, false otherwise setOverride = function( self, override ) assert( type(override)=="boolean", "override has to be either true or false") self.comm.override = override end, --- Sends a UPnP queries and collects a single or multiple responses -- -- @return status true on success, false on failure -- @return result table or string containing results or error message -- on failure. queryServices = function( self ) local status, err = self.comm:connect() local response if ( not(status) ) then return false, err end status, err = self.comm:sendRequest() if ( not(status) ) then return false, err end status, response = self.comm:receiveResponse() self.comm:close() return status, response end, } return _ENV;