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

     1  # Copyright (C) 2003-2007, 2009, 2010 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 dns.exception
    17  import dns.rdata
    18  import dns.tokenizer
    19
    20 -class NSAP(dns.rdata.Rdata):
    21      """NSAP record.
    22
    23      @ivar address: a NASP
    24      @type address: string
    25      @see: RFC 1706"""
    26
    27      __slots__ = ['address']
    28
    29 -    def __init__(self, rdclass, rdtype, address):
    30          super(NSAP, self).__init__(rdclass, rdtype)
    31          self.address = address
    32
    33 -    def to_text(self, origin=None, relativize=True, **kw):
    34          return "0x%s" % self.address.encode('hex_codec')
    35
    36 -    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
    37          address = tok.get_string()
    38          t = tok.get_eol()
    39          if address[0:2] != '0x':
    40              raise dns.exception.SyntaxError('string does not start with 0x')
    41          address = address[2:].replace('.', '')
    42          if len(address) % 2 != 0:
    43              raise dns.exception.SyntaxError('hexstring has odd length')
    44          address = address.decode('hex_codec')
    45          return cls(rdclass, rdtype, address)
    46
    47      from_text = classmethod(from_text)
    48
    49 -    def to_wire(self, file, compress = None, origin = None):
    50          file.write(self.address)
    51
    52 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
    53          address = wire[current : current + rdlen]
    54          return cls(rdclass, rdtype, address)
    55
    56      from_wire = classmethod(from_wire)
    57
    58 -    def _cmp(self, other):
    59          return cmp(self.address, other.address)
    60