Package dns :: Package rdtypes :: Package ANY :: Module ISDN |
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# Source Code for Module dns.rdtypes.ANY.ISDN

     1  # Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
     2  #
     3  # Permission to use, copy, modify, and distribute this software and its
     4  # documentation for any purpose with or without fee is hereby granted,
     5  # provided that the above copyright notice and this permission notice
     6  # appear in all copies.
     7  #
     8  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
     9  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    10  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
    11  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    12  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    13  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
    14  # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    15
    16  import struct
    17
    18  import dns.exception
    19  import dns.rdata
    20  import dns.tokenizer
    21  from dns._compat import text_type
    22
    23
    24 -class ISDN(dns.rdata.Rdata):
    25
    26      """ISDN record
    27
    28      @ivar address: the ISDN address
    29      @type address: string
    30      @ivar subaddress: the ISDN subaddress (or '' if not present)
    31      @type subaddress: string
    32      @see: RFC 1183"""
    33
    34      __slots__ = ['address', 'subaddress']
    35
    36 -    def __init__(self, rdclass, rdtype, address, subaddress):
    37          super(ISDN, self).__init__(rdclass, rdtype)
    38          if isinstance(address, text_type):
    39              self.address = address.encode()
    40          else:
    41              self.address = address
    42          if isinstance(address, text_type):
    43              self.subaddress = subaddress.encode()
    44          else:
    45              self.subaddress = subaddress
    46
    47 -    def to_text(self, origin=None, relativize=True, **kw):
    48          if self.subaddress:
    49              return '"%s" "%s"' % (dns.rdata._escapify(self.address),
    50                                    dns.rdata._escapify(self.subaddress))
    51          else:
    52              return '"%s"' % dns.rdata._escapify(self.address)
    53
    54      @classmethod
    55 -    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
    56          address = tok.get_string()
    57          t = tok.get()
    58          if not t.is_eol_or_eof():
    59              tok.unget(t)
    60              subaddress = tok.get_string()
    61          else:
    62              tok.unget(t)
    63              subaddress = ''
    64          tok.get_eol()
    65          return cls(rdclass, rdtype, address, subaddress)
    66
    67 -    def to_wire(self, file, compress=None, origin=None):
    68          l = len(self.address)
    69          assert l < 256
    70          file.write(struct.pack('!B', l))
    71          file.write(self.address)
    72          l = len(self.subaddress)
    73          if l > 0:
    74              assert l < 256
    75              file.write(struct.pack('!B', l))
    76              file.write(self.subaddress)
    77
    78      @classmethod
    79 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
    80          l = wire[current]
    81          current += 1
    82          rdlen -= 1
    83          if l > rdlen:
    84              raise dns.exception.FormError
    85          address = wire[current: current + l].unwrap()
    86          current += l
    87          rdlen -= l
    88          if rdlen > 0:
    89              l = wire[current]
    90              current += 1
    91              rdlen -= 1
    92              if l != rdlen:
    93                  raise dns.exception.FormError
    94              subaddress = wire[current: current + l].unwrap()
    95          else:
    96              subaddress = ''
    97          return cls(rdclass, rdtype, address, subaddress)
    98