o [NSE] Added gps library and the gpsd-info script that collects GPS data

from the gpsd daemon. [Patrik Karlsson]

scripts/gpsd-info.nse

@@ -0,0 +1,99 @@
+description = [[
+Retrieves GPS time, coordinates and speed from the GPSD network daemon.
+]]
+
+---
+-- @usage
+-- nmap -p 2947 <ip> --script gpsd-info
+--
+-- @output
+-- PORT     STATE SERVICE REASON
+-- 2947/tcp open  gpsd-ng syn-ack
+-- | gpsd-info: 
+-- |   Time of fix: Sat Apr 14 15:54:23 2012
+-- |   Coordinates: 59.321685,17.886493
+-- |_  Speed: - knots
+--
+
+
+author = "Patrik Karlsson"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+categories = {"discovery", "safe"}
+
+local shortport = require 'shortport'
+local gps       = require 'gps'
+local json      = require 'json'
+local match     = require 'match'
+
+portrule = shortport.port_or_service(2947, "gpsd-ng", "tcp")
+
+local arg_timeout = tonumber(stdnse.get_script_args(SCRIPT_NAME .. ".timeout")) or 10
+
+local function updateData(gpsinfo, entry)
+	for k, v in pairs(gpsinfo) do
+		if ( entry[k] and 0 < #tostring(entry[k]) ) then
+			gpsinfo[k] = entry[k]
+		end
+	end
+end
+
+local function hasAllData(gpsinfo)
+	for k, v in pairs(gpsinfo) do
+		if ( k ~= "speed" and v == '-' ) then
+			return false
+		end
+	end
+	return true
+end
+
+local function fail(err) return ("\n  ERROR: %s"):format(err or "") end
+
+action = function(host, port)
+	
+	local gpsinfo = {
+		longitude = "-",
+		latitude = "-",
+		speed = "-",
+		time  = "-",
+		date  = "-",
+	}
+
+	local socket = nmap.new_socket()
+	socket:set_timeout(1000)
+	
+	local status = socket:connect(host, port)
+	
+	if ( not(status) ) then
+		return fail("Failed to connect to server")
+	end
+
+	-- get the banner
+	local status, line = socket:receive_lines(1)
+	socket:send('?WATCH={"enable":true,"nmea":true}\r\n')
+	
+	local start_time = os.time()
+	
+	repeat
+		local entry
+		status, line = socket:receive_buf("\r\n")
+		if ( status ) then
+			status, entry = gps.NMEA.parse(line)
+			if ( status ) then
+				updateData(gpsinfo, entry)
+			end
+		end
+	until( os.time() - start_time > arg_timeout or hasAllData(gpsinfo) )
+
+	socket:send('?WATCH={"enable":false}\r\n')
+
+	if ( not(hasAllData(gpsinfo)) ) then
+		return
+	end
+
+	local output = {
+		("Time of fix: %s UTC"):format(os.date("%c", gps.Util.convertTime(gpsinfo.date, gpsinfo.time))),
+		("Coordinates: %.4f,%.4f"):format(tonumber(gpsinfo.latitude), tonumber(gpsinfo.longitude)),
+		("Speed: %s knots"):format(gpsinfo.speed)
+	}	
+	return stdnse.format_output(true, output)
+end

scripts/script.db

@@ -94,6 +94,7 @@ Entry { filename = "ftp-vuln-cve2010-4221.nse", categories = { "intrusive", "vul
 Entry { filename = "ganglia-info.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "giop-info.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "gopher-ls.nse", categories = { "default", "discovery", "safe", } }
+Entry { filename = "gpsd-info.nse", categories = { "discovery", "safe", } }
 Entry { filename = "hadoop-datanode-info.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "hadoop-jobtracker-info.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "hadoop-namenode-info.nse", categories = { "default", "discovery", "safe", } }