Module: NetSpace

Defined in:
lib/netspace.rb,
lib/netspace/subnet.rb

Defined Under Namespace

Classes: Subnet

Class Method Summary collapse

Class Method Details

.ip2num(ip) ⇒ Object

Utility for converting a string IP (e.g. “127.0.0.1”) to it’s 32-bit integer equivalent (e.g., 2130706433).



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# File 'lib/netspace.rb', line 36

def self.ip2num(ip)
  return ip.split(/\./).map {|i| i.to_i}.pack("C*").unpack("N")[0]
end

.load(file) ⇒ Object

Load a file containing CIDR subnet definitions, one per line. The result will be an array of Subnet objects.



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# File 'lib/netspace.rb', line 9

def self.load(file)
  NetSpace::parse(File.read(file))
end

.num2ip(num) ⇒ Object

Utility for converting a 32-bit integer IP (e.g. 2130706433) to it’s string equivalent (e.g., “127.0.0.1”).



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# File 'lib/netspace.rb', line 45

def self.num2ip(num)
  return [num].pack("N").unpack("C*").join(".")
end

.parse(string) ⇒ Object

Parse a string containing CIDR subnet definitions, one per line. The result will be an array of Subnet objects.



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# File 'lib/netspace.rb', line 18

def self.parse(string)
  nets = string.split(/\n/).map do |line|
    begin
      line.strip!
      line =~ /^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)\/([0-9]+)$/
      Subnet.new($1, $2.to_i)
    rescue
      nil
    end
  end
  return nets - [nil]
end