A Resolv::DNS IPv6 address.
A composite IPv6 address Regexp.
IPv6 address format a:b:c:d:e:f:g:h
Compressed IPv6 address format a::b
Creates a new IPv6 address from arg
which may be:
returns arg
.
arg
must match one of the IPv6::Regex* constants
# File resolv.rb, line 2476 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
Turns this IPv6 address into a Resolv::DNS::Name.
# File resolv.rb, line 2551 def to_name return DNS::Name.new( @address.unpack("H32")[0].split(//).reverse + ['ip6', 'arpa']) end