Package dns :: Package rdtypes :: Package IN :: Module A |
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# Source Code for Module dns.rdtypes.IN.A

     1  # Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
     2  #
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     4  # documentation for any purpose with or without fee is hereby granted,
     5  # provided that the above copyright notice and this permission notice
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     8  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
     9  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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    15
    16  import dns.exception
    17  import dns.ipv4
    18  import dns.rdata
    19  import dns.tokenizer
    20
    21 -class A(dns.rdata.Rdata):
    22      """A record.
    23
    24      @ivar address: an IPv4 address
    25      @type address: string (in the standard "dotted quad" format)"""
    26
    27      __slots__ = ['address']
    28
    29 -    def __init__(self, rdclass, rdtype, address):
    30          super(A, self).__init__(rdclass, rdtype)
    31          # check that it's OK
    32          junk = dns.ipv4.inet_aton(address)
    33          self.address = address
    34
    35 -    def to_text(self, origin=None, relativize=True, **kw):
    36          return self.address
    37
    38 -    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
    39          address = tok.get_identifier()
    40          tok.get_eol()
    41          return cls(rdclass, rdtype, address)
    42
    43      from_text = classmethod(from_text)
    44
    45 -    def to_wire(self, file, compress = None, origin = None):
    46          file.write(dns.ipv4.inet_aton(self.address))
    47
    48 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
    49          address = dns.ipv4.inet_ntoa(wire[current : current + rdlen])
    50          return cls(rdclass, rdtype, address)
    51
    52      from_wire = classmethod(from_wire)
    53
    54 -    def _cmp(self, other):
    55          sa = dns.ipv4.inet_aton(self.address)
    56          oa = dns.ipv4.inet_aton(other.address)
    57          return cmp(sa, oa)
    58