Class: Resolv::IPv6

Inherits:
Object
  • Object
show all
Defined in:
lib/resolv.rb

Constant Summary collapse

Regex_8Hex = 
/\A
(?:[0-9A-Fa-f]{1,4}:){7}
   [0-9A-Fa-f]{1,4}
\z/x
Regex_CompressedHex = 
/\A
((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::
((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)
\z/x
Regex_6Hex4Dec = 
/\A
((?:[0-9A-Fa-f]{1,4}:){6,6})
(\d+)\.(\d+)\.(\d+)\.(\d+)
\z/x
Regex_CompressedHex4Dec = 
/\A
((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?) ::
((?:[0-9A-Fa-f]{1,4}:)*)
(\d+)\.(\d+)\.(\d+)\.(\d+)
\z/x
Regex = 
/
(?:#{Regex_8Hex}) |
(?:#{Regex_CompressedHex}) |
(?:#{Regex_6Hex4Dec}) |
(?:#{Regex_CompressedHex4Dec})/x

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(address) ⇒ IPv6

Returns a new instance of IPv6.



1843
1844
1845
1846
1847
1848
 
# File 'lib/resolv.rb', line 1843

def initialize(address)
  unless address.kind_of?(String) && address.length == 16
    raise ArgumentError.new('IPv6 address must be 16 bytes')
  end
  @address = address
end

Instance Attribute Details

#address ⇒ Object (readonly)

Returns the value of attribute address.



1849
1850
1851
 
# File 'lib/resolv.rb', line 1849

def address
  @address
end

Class Method Details

.create(arg) ⇒ Object 



1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
 
# File 'lib/resolv.rb', line 1797

def self.create(arg)
  case arg
  when IPv6
    return arg
  when String
    address = ''
    if Regex_8Hex =~ arg
      arg.scan(/[0-9A-Fa-f]+/) {|hex| address << [hex.hex].pack('n')}
    elsif Regex_CompressedHex =~ arg
      prefix = $1
      suffix = $2
      a1 = ''
      a2 = ''
      prefix.scan(/[0-9A-Fa-f]+/) {|hex| a1 << [hex.hex].pack('n')}
      suffix.scan(/[0-9A-Fa-f]+/) {|hex| a2 << [hex.hex].pack('n')}
      omitlen = 16 - a1.length - a2.length
      address << a1 << "\0" * omitlen << a2
    elsif Regex_6Hex4Dec =~ arg
      prefix, a, b, c, d = $1, $2.to_i, $3.to_i, $4.to_i, $5.to_i
      if (0..255) === a && (0..255) === b && (0..255) === c && (0..255) === d
        prefix.scan(/[0-9A-Fa-f]+/) {|hex| address << [hex.hex].pack('n')}
        address << [a, b, c, d].pack('CCCC')
      else
        raise ArgumentError.new("not numeric IPv6 address: " + arg)
      end
    elsif Regex_CompressedHex4Dec =~ arg
      prefix, suffix, a, b, c, d = $1, $2, $3.to_i, $4.to_i, $5.to_i, $6.to_i
      if (0..255) === a && (0..255) === b && (0..255) === c && (0..255) === d
        a1 = ''
        a2 = ''
        prefix.scan(/[0-9A-Fa-f]+/) {|hex| a1 << [hex.hex].pack('n')}
        suffix.scan(/[0-9A-Fa-f]+/) {|hex| a2 << [hex.hex].pack('n')}
        omitlen = 12 - a1.length - a2.length
        address << a1 << "\0" * omitlen << a2 << [a, b, c, d].pack('CCCC')
      else
        raise ArgumentError.new("not numeric IPv6 address: " + arg)
      end
    else
      raise ArgumentError.new("not numeric IPv6 address: " + arg)
    end
    return IPv6.new(address)
  else
    raise ArgumentError.new("cannot interpret as IPv6 address: #{arg.inspect}")
  end
end

Instance Method Details

#==(other) ⇒ Object 



1869
1870
1871
 
# File 'lib/resolv.rb', line 1869

def ==(other)
  return @address == other.address
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


1873
1874
1875
 
# File 'lib/resolv.rb', line 1873

def eql?(other)
  return self == other
end

#hash ⇒ Object 



1877
1878
1879
 
# File 'lib/resolv.rb', line 1877

def hash
  return @address.hash
end

#inspect ⇒ Object 



1859
1860
1861
 
# File 'lib/resolv.rb', line 1859

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

#to_name ⇒ Object 



1863
1864
1865
1866
1867
 
# File 'lib/resolv.rb', line 1863

def to_name
  # ip6.arpa should be searched too. [RFC3152]
  return DNS::Name.new(
    @address.unpack("H32")[0].split(//).reverse + ['ip6', 'int'])
end

#to_s ⇒ Object 



1851
1852
1853
1854
1855
1856
1857
 
# File 'lib/resolv.rb', line 1851

def to_s
  address = sprintf("%X:%X:%X:%X:%X:%X:%X:%X", *@address.unpack("nnnnnnnn"))
  unless address.sub!(/(^|:)0(:0)+(:|$)/, '::')
    address.sub!(/(^|:)0(:|$)/, '::')
  end
  return address
end