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, 2009-2011 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 HINFO(dns.rdata.Rdata):
    25
    26      """HINFO record
    27
    28      @ivar cpu: the CPU type
    29      @type cpu: string
    30      @ivar os: the OS type
    31      @type os: string
    32      @see: RFC 1035"""
    33
    34      __slots__ = ['cpu', 'os']
    35
    36 -    def __init__(self, rdclass, rdtype, cpu, os):
    37          super(HINFO, self).__init__(rdclass, rdtype)
    38          if isinstance(cpu, text_type):
    39              self.cpu = cpu.encode()
    40          else:
    41              self.cpu = cpu
    42          if isinstance(os, text_type):
    43              self.os = os.encode()
    44          else:
    45              self.os = os
    46
    47 -    def to_text(self, origin=None, relativize=True, **kw):
    48          return '"%s" "%s"' % (dns.rdata._escapify(self.cpu),
    49                                dns.rdata._escapify(self.os))
    50
    51      @classmethod
    52 -    def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
    53          cpu = tok.get_string()
    54          os = tok.get_string()
    55          tok.get_eol()
    56          return cls(rdclass, rdtype, cpu, os)
    57
    58 -    def to_wire(self, file, compress=None, origin=None):
    59          l = len(self.cpu)
    60          assert l < 256
    61          file.write(struct.pack('!B', l))
    62          file.write(self.cpu)
    63          l = len(self.os)
    64          assert l < 256
    65          file.write(struct.pack('!B', l))
    66          file.write(self.os)
    67
    68      @classmethod
    69 -    def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
    70          l = wire[current]
    71          current += 1
    72          rdlen -= 1
    73          if l > rdlen:
    74              raise dns.exception.FormError
    75          cpu = wire[current:current + l].unwrap()
    76          current += l
    77          rdlen -= l
    78          l = wire[current]
    79          current += 1
    80          rdlen -= 1
    81          if l != rdlen:
    82              raise dns.exception.FormError
    83          os = wire[current: current + l].unwrap()
    84          return cls(rdclass, rdtype, cpu, os)
    85