mirror of https://github.com/morpheus65535/bazarr
126 lines
4.4 KiB
Python
126 lines
4.4 KiB
Python
# Copyright (C) 2003-2007, 2009-2011 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.exception
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import dns.name
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import dns.rdata
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from dns._compat import xrange, text_type
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def _write_string(file, s):
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l = len(s)
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assert l < 256
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file.write(struct.pack('!B', l))
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file.write(s)
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def _sanitize(value):
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if isinstance(value, text_type):
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return value.encode()
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return value
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class NAPTR(dns.rdata.Rdata):
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"""NAPTR record
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@ivar order: order
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@type order: int
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@ivar preference: preference
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@type preference: int
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@ivar flags: flags
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@type flags: string
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@ivar service: service
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@type service: string
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@ivar regexp: regular expression
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@type regexp: string
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@ivar replacement: replacement name
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@type replacement: dns.name.Name object
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@see: RFC 3403"""
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__slots__ = ['order', 'preference', 'flags', 'service', 'regexp',
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'replacement']
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def __init__(self, rdclass, rdtype, order, preference, flags, service,
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regexp, replacement):
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super(NAPTR, self).__init__(rdclass, rdtype)
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self.flags = _sanitize(flags)
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self.service = _sanitize(service)
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self.regexp = _sanitize(regexp)
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self.order = order
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self.preference = preference
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self.replacement = replacement
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def to_text(self, origin=None, relativize=True, **kw):
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replacement = self.replacement.choose_relativity(origin, relativize)
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return '%d %d "%s" "%s" "%s" %s' % \
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(self.order, self.preference,
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dns.rdata._escapify(self.flags),
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dns.rdata._escapify(self.service),
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dns.rdata._escapify(self.regexp),
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replacement)
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@classmethod
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def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
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order = tok.get_uint16()
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preference = tok.get_uint16()
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flags = tok.get_string()
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service = tok.get_string()
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regexp = tok.get_string()
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replacement = tok.get_name()
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replacement = replacement.choose_relativity(origin, relativize)
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tok.get_eol()
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return cls(rdclass, rdtype, order, preference, flags, service,
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regexp, replacement)
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def to_wire(self, file, compress=None, origin=None):
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two_ints = struct.pack("!HH", self.order, self.preference)
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file.write(two_ints)
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_write_string(file, self.flags)
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_write_string(file, self.service)
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_write_string(file, self.regexp)
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self.replacement.to_wire(file, compress, origin)
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@classmethod
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def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
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(order, preference) = struct.unpack('!HH', wire[current: current + 4])
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current += 4
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rdlen -= 4
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strings = []
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for i in xrange(3):
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l = wire[current]
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current += 1
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rdlen -= 1
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if l > rdlen or rdlen < 0:
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raise dns.exception.FormError
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s = wire[current: current + l].unwrap()
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current += l
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rdlen -= l
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strings.append(s)
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(replacement, cused) = dns.name.from_wire(wire[: current + rdlen],
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current)
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if cused != rdlen:
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raise dns.exception.FormError
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if origin is not None:
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replacement = replacement.relativize(origin)
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return cls(rdclass, rdtype, order, preference, strings[0], strings[1],
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strings[2], replacement)
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def choose_relativity(self, origin=None, relativize=True):
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self.replacement = self.replacement.choose_relativity(origin,
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relativize)
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