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Class: Resolv::IPv4

Relationships & Source Files
Inherits: Object
Defined in: lib/resolv.rb

Overview

A DNS IPv4 address.

Constant Summary

Class Method Summary

Instance Attribute Summary

  • #address readonly

    The raw IPv4 address as a String.

Instance Method Summary

Constructor Details

.new(address) ⇒ IPv4

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2385

def initialize(address) # :nodoc:
  unless address.kind_of?(String)
    raise ArgumentError, 'IPv4 address must be a string'
  end
  unless address.length == 4
    raise ArgumentError, "IPv4 address expects 4 bytes but #{address.length} bytes"
  end
  @address = address
end

Class Method Details

.create(arg)

[ GitHub ]

  
# File 'lib/resolv.rb', line 2367

def self.create(arg)
  case arg
  when IPv4
    return arg
  when Regex
    if (0..255) === (a = $1.to_i) &&
       (0..255) === (b = $2.to_i) &&
       (0..255) === (c = $3.to_i) &&
       (0..255) === (d = $4.to_i)
      return self.new([a, b, c, d].pack("CCCC"))
    else
      raise ArgumentError.new("IPv4 address with invalid value: " + arg)
    end
  else
    raise ArgumentError.new("cannot interpret as IPv4 address: #{arg.inspect}")
  end
end

Instance Attribute Details

#address (readonly)

The raw IPv4 address as a String.

[ GitHub ]

  
# File 'lib/resolv.rb', line 2401

attr_reader :address

Instance Method Details

#==(other)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2419

def ==(other) # :nodoc:
  return @address == other.address
end

#eql?(other) ⇒ Boolean

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2423

def eql?(other) # :nodoc:
  return self == other
end

#hash

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2427

def hash # :nodoc:
  return @address.hash
end

#inspect

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2407

def inspect # :nodoc:
  return "#<#{self.class} #{self}>"
end

#to_name

Turns this IPv4 address into a DNS::Name.

[ GitHub ]

  
# File 'lib/resolv.rb', line 2414

def to_name
  return DNS::Name.create(
    '%d.%d.%d.%d.in-addr.arpa.' % @address.unpack('CCCC').reverse)
end

#to_s

This method is for internal use only.
[ GitHub ]

  
# File 'lib/resolv.rb', line 2403

def to_s # :nodoc:
  return sprintf("%d.%d.%d.%d", *@address.unpack("CCCC"))
end