mirror of https://github.com/morpheus65535/bazarr
77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
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# Copyright (C) 2001-2017 Nominum, Inc.
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose with or without fee is hereby granted,
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# provided that the above copyright notice and this permission notice
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# appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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import struct
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import dns.edns
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import dns.immutable
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import dns.exception
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import dns.rdata
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# We don't implement from_text, and that's ok.
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# pylint: disable=abstract-method
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@dns.immutable.immutable
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class OPT(dns.rdata.Rdata):
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"""OPT record"""
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__slots__ = ['options']
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def __init__(self, rdclass, rdtype, options):
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"""Initialize an OPT rdata.
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*rdclass*, an ``int`` is the rdataclass of the Rdata,
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which is also the payload size.
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*rdtype*, an ``int`` is the rdatatype of the Rdata.
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*options*, a tuple of ``bytes``
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"""
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super().__init__(rdclass, rdtype)
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def as_option(option):
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if not isinstance(option, dns.edns.Option):
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raise ValueError('option is not a dns.edns.option')
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return option
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self.options = self._as_tuple(options, as_option)
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def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
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for opt in self.options:
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owire = opt.to_wire()
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file.write(struct.pack("!HH", opt.otype, len(owire)))
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file.write(owire)
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def to_text(self, origin=None, relativize=True, **kw):
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return ' '.join(opt.to_text() for opt in self.options)
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@classmethod
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def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
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options = []
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while parser.remaining() > 0:
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(otype, olen) = parser.get_struct('!HH')
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with parser.restrict_to(olen):
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opt = dns.edns.option_from_wire_parser(otype, parser)
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options.append(opt)
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return cls(rdclass, rdtype, options)
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@property
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def payload(self):
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"payload size"
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return self.rdclass
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