check_vncport_set.rb

#!/usr/bin/env ruby
#
## -------------------------------------------------------------------------- #
## Copyright 2002-2016, OpenNebula Project, OpenNebula Systems                #
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## Licensed under the Apache License, Version 2.0 (the "License"); you may    #
## not use this file except in compliance with the License. You may obtain    #
## a copy of the License at                                                   #
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## http://www.apache.org/licenses/LICENSE-2.0                                 #
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## Unless required by applicable law or agreed to in writing, software        #
## distributed under the License is distributed on an "AS IS" BASIS,          #
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## limitations under the License.                                             #
##--------------------------------------------------------------------------- #

require 'bitset'
require 'base64'
require 'zlib'

txt = 'eJztziEBAAAIA8FK0L8cC4AGcydeTK0KAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA6HWM5PoLAAAAAAB8GbhQAtg='

#Decode base64
decoded = Base64.strict_decode64(txt)

#Inflate string
zstream = Zlib::Inflate.new
buf = zstream.inflate(decoded)
zstream.finish
zstream.close

#Create bitset
bs = Bitset.from_s(buf)

(0..65534).each{ |index|
   puts "VNC port set in bitmap: #{65535-index}" if bs[index]
}