NSE committed

scripts/echoTest.nse

@@ -0,0 +1,36 @@
+id = "Echo"
+
+description = "Connects to the UDP echo service, sends a string, receives a string and if both\
+strings are equal reports success."
+
+author = "Diman Todorov <diman.todorov@gmail.com>"
+
+license = "See nmaps COPYING for licence"
+
+categories = {"demo"}
+
+portrule = function(host, port)
+	if 	port.number == 7
+		and port.service == "echo"
+		and port.protocol == "udp"
+	then
+		return true
+	else
+		return false
+	end
+end
+
+action = function(host, port)
+	local echostr = "hello there"
+	local socket = nmap.new_socket()
+	socket:connect(host.ip, port.number, "udp")
+	socket:send(echostr)
+	local status, result = socket:receive_lines(1);
+	socket:close()
+
+	if (result == echostr) then
+		return "UDP Echo: correct response"
+	end
+
+	return
+end