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

     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 HINFO(dns.rdata.Rdata):
    21      """HINFO record
    22
    23      @ivar cpu: the CPU type
    24      @type cpu: string
    25      @ivar os: the OS type
    26      @type os: string
    27      @see: RFC 1035"""
    28
    29      __slots__ = ['cpu', 'os']
    30
    31 -    def __init__(self, rdclass, rdtype, cpu, os):
    32          super(HINFO, self).__init__(rdclass, rdtype)
    33          self.cpu = cpu
    34          self.os = os
    35
    36 -    def to_text(self, origin=None, relativize=True, **kw):
    37          return '"%s" "%s"' % (dns.rdata._escapify(self.cpu),
    38                                dns.rdata._escapify(self.os))
    39
    40 -    def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
    41          cpu = tok.get_string()
    42          os = tok.get_string()
    43          tok.get_eol()
    44          return cls(rdclass, rdtype, cpu, os)
    45
    46      from_text = classmethod(from_text)
    47
    48 -    def to_wire(self, file, compress = None, origin = None):
    49          l = len(self.cpu)
    50          assert l < 256
    51          byte = chr(l)
    52          file.write(byte)
    53          file.write(self.cpu)
    54          l = len(self.os)
    55          assert l < 256
    56          byte = chr(l)
    57          file.write(byte)
    58          file.write(self.os)
    59
    60 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin = None):
    61          l = ord(wire[current])
    62          current += 1
    63          rdlen -= 1
    64          if l > rdlen:
    65              raise dns.exception.FormError
    66          cpu = wire[current : current + l]
    67          current += l
    68          rdlen -= l
    69          l = ord(wire[current])
    70          current += 1
    71          rdlen -= 1
    72          if l != rdlen:
    73              raise dns.exception.FormError
    74          os = wire[current : current + l]
    75          return cls(rdclass, rdtype, cpu, os)
    76
    77      from_wire = classmethod(from_wire)
    78
    79 -    def _cmp(self, other):
    80          v = cmp(self.cpu, other.cpu)
    81          if v == 0:
    82              v = cmp(self.os, other.os)
    83          return v
    84