local http = require "http"
local ipOps = require "ipOps"
local json = require "json"
local stdnse = require "stdnse"
local table = require "table"

description = [[
Tries to identify the physical location of an IP address using the
Geoplugin geolocation web service (http://www.geoplugin.com/). There
is no limit on lookups using this service.
]]

---
-- @usage
-- nmap --script ip-geolocation-geoplugin <target>
--
-- @output
-- | ip-geolocation-geoplugin:
-- | 74.207.244.221 (scanme.nmap.org)
-- |   coordinates (lat,lon): 39.4208984375,-74.497703552246
-- |_  state: New Jersey, United States
--

author = "Gorjan Petrovski"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"discovery","external","safe"}


hostrule = function(host)
	local is_private, err = ipOps.isPrivate( host.ip )
    if is_private == nil then
      stdnse.print_debug( "%s Error in Hostrule: %s.", SCRIPT_NAME, err )
      return false
    end
    return not is_private
end

-- No limit on requests
local geoplugin = function(ip)
	local response = http.get("www.geoplugin.net", 80, "/json.gp?ip="..ip, nil)
	local stat, loc = json.parse(response.body)
	if not stat then return nil end
	
	local output = {}
	table.insert(output, "coordinates (lat,lon): "..loc.geoplugin_latitude..","..loc.geoplugin_longitude)
	local regionName = (loc.geoplugin_regionName == json.NULL) and "Unknown" or loc.geoplugin_regionName
	table.insert(output,"state: ".. regionName ..", ".. loc.geoplugin_countryName)
	
	return output
end
	
action = function(host,port)
	local output = geoplugin(host.ip)

	if(#output~=0) then 
		output.name = host.ip 
		if host.targetname then
			output.name = output.name.." ("..host.targetname..")" 
		end
	end
	
	return stdnse.format_output(true,output)
end