#

    # +address+ must be a Resolv::IPv4, Resolv::IPv6 or a String.  Retrieved

    #

    # +address+ must be a Resolv::IPv4, Resolv::IPv6 or a String.  Retrieved

    #

    # +address+ must be a Resolv::IPv4, Resolv::IPv6 or a String.  Retrieved

        ptr = IPv4.create(address).to_name

      when IPv6::Regex

        ptr = IPv6.create(address).to_name

      else

          @port = port

          is_ipv6 = host.index(':')

          @sock = UDPSocket.new(is_ipv6 ? Socket::AF_INET6 : Socket::AF_INET)

        ##

        # An IPv6 address record.

          def initialize(address)

            @address = IPv6.create(address)

    def valid_v6?(addr)

      # IPv6 (normal)

      return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr

      # IPv6 (IPv4 compat)

# IPAddr provides a set of methods to manipulate an IP address.  Both IPv4 and

# IPv6 are supported.

#   

#   p ipaddr1			#=> #<IPAddr: IPv6:3ffe:0505:0002:0000:0000:0000:0000:0001/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff>

  # Returns a new ipaddr built by converting the native IPv4 address

  # into an IPv4-mapped IPv6 address.

  # Returns a new ipaddr built by converting the native IPv4 address

  # into an IPv4-compatible IPv6 address.

  # Returns a new ipaddr built by converting the IPv6 address into a

  # native IPv4 address.  If the IP address is not an IPv4-mapped or

  # IPv4-compatible IPv6 address, returns self.

      # RFC 2396 (URI Generic Syntax)

      # RFC 2732 (IPv6 Literal Addresses in URL's)

      # RFC 2373 (IPv6 Addressing Architecture)

      HEXSEQ2 = "(?:#{HEX4}:)*#{LASTPART}"

      # IPv6address = hexseq2 | [ hexseq1 ] "::" [ hexseq2 ]

      IPV6ADDR = "(?:#{HEXSEQ2}|(?:#{HEXSEQ1})?::(?:#{HEXSEQ2})?)"

      # IPv6prefix  = ( hexseq1 | [ hexseq1 ] "::" [ hexseq1 ] ) "/" 1*2DIGIT

      # ipv6reference = "[" IPv6address "]" (RFC 2732)

      IPV6REF = "\\[#{IPV6ADDR}\\]"

      # host          = hostname | IPv4address | IPv6reference (RFC 2732)

      HOST = "(?:#{HOSTNAME}|#{IPV4ADDR}|#{IPV6REF})"

      # port          = *digit

netbsd*) #(vi

	# setting _XOPEN_SOURCE breaks IPv6 for lynx on NetBSD 1.6, breaks xterm, is not needed for ncursesw