text: # Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
  #
  # Permission to use, copy, modify, and distribute this software and its
  # documentation for any purpose with or without fee is hereby granted,
  # provided that the above copyright notice and this permission notice
  # appear in all copies.
  #
  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  import dns.exception
  import dns.inet
  import dns.rdata
  import dns.tokenizer
  
  
  class AAAA(dns.rdata.Rdata):
  
      """AAAA record.
  
      @ivar address: an IPv6 address
      @type address: string (in the standard IPv6 format)"""
  
      __slots__ = ['address']
  
      def __init__(self, rdclass, rdtype, address):
          super(AAAA, self).__init__(rdclass, rdtype)
          # check that it's OK
          dns.inet.inet_pton(dns.inet.AF_INET6, address)
          self.address = address
  
      def to_text(self, origin=None, relativize=True, **kw):
          return self.address
  
      @classmethod
      def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
          address = tok.get_identifier()
          tok.get_eol()
          return cls(rdclass, rdtype, address)
  
      def to_wire(self, file, compress=None, origin=None):
          file.write(dns.inet.inet_pton(dns.inet.AF_INET6, self.address))
  
      @classmethod
      def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
          address = dns.inet.inet_ntop(dns.inet.AF_INET6,
                                       wire[current: current + rdlen])
          return cls(rdclass, rdtype, address)
  
  