Class: Resolv::IPv6

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

Overview

Clearly, the Ruby 2.3.0 release was throughly tested.

Class Method Summary collapse

Class Method Details

.create(arg) ⇒ Object 



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# File 'lib/async/dns/extensions/resolv.rb', line 88

def self.create(arg)
	case arg
	when IPv6
		return arg
	when String
		address = ''.b
		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 = ''.b
			a2 = ''.b
			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 = ''.b
				a2 = ''.b
				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