Module: IpRanges

Defined in:
lib/ip-ranges.rb,
lib/ip-ranges/ip.rb,
lib/ip-ranges/range.rb

Overview

Manipulate and compare ranges of Ip numbers. In particular, this gem allows you to specify multiple Ip ranges, in a variety of formats, and compare them for overlaps, equivalence and containment (i.e. range1 contains all of range2)

:title: IpRanges Gem

Author

David Salgado ([email protected])

Copyright

Copyright © 2011 David Salgado

License

Distributes under the same terms as Ruby

Defined Under Namespace

Classes: Ip, Range

Instance Method Summary collapse

Instance Method Details

#check_for_overlaps(list) ⇒ Object

Checks multiple ranges of IP numbers for uniqueness (in the sense that a given IP number should only appear once within the set of all supplied ranges).

Arguments:

  • An array of strings that define single IP numbers or ranges (in dotted or CIDR notation)

Returns:

  • An array of strings describing any overlaps, equivalences and containments which occur in the list (see the specs for details)



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# File 'lib/ip-ranges.rb', line 25

def check_for_overlaps(list)
  rtn = []
  while list.any?
    test_range = list.shift
    test = Range.new :range => test_range
    list.each do |range| 
      i = Range.new :range => range
      if test.overlaps_range?(i)
        if test == i
          rtn << "#{test_range} equals range #{range}"
        elsif test.contains_range?(i)
          rtn << "#{test_range} contains range #{range}"
        elsif i.contains_range?(test)
          rtn << "#{test_range} is contained by range #{range}"
        else
          rtn << "#{test_range} overlaps with #{range}"
        end
      end
    end
  end
  rtn
end