mirror of https://github.com/morpheus65535/bazarr
74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
|
|
#
|
|
# Permission to use, copy, modify, and distribute this software and its
|
|
# documentation for any purpose with or without fee is hereby granted,
|
|
# provided that the above copyright notice and this permission notice
|
|
# appear in all copies.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
|
|
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
|
|
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
import struct
|
|
|
|
import dns.exception
|
|
import dns.rdata
|
|
import dns.tokenizer
|
|
|
|
|
|
class CAA(dns.rdata.Rdata):
|
|
|
|
"""CAA (Certification Authority Authorization) record
|
|
|
|
@ivar flags: the flags
|
|
@type flags: int
|
|
@ivar tag: the tag
|
|
@type tag: string
|
|
@ivar value: the value
|
|
@type value: string
|
|
@see: RFC 6844"""
|
|
|
|
__slots__ = ['flags', 'tag', 'value']
|
|
|
|
def __init__(self, rdclass, rdtype, flags, tag, value):
|
|
super(CAA, self).__init__(rdclass, rdtype)
|
|
self.flags = flags
|
|
self.tag = tag
|
|
self.value = value
|
|
|
|
def to_text(self, origin=None, relativize=True, **kw):
|
|
return '%u %s "%s"' % (self.flags,
|
|
dns.rdata._escapify(self.tag),
|
|
dns.rdata._escapify(self.value))
|
|
|
|
@classmethod
|
|
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True):
|
|
flags = tok.get_uint8()
|
|
tag = tok.get_string().encode()
|
|
if len(tag) > 255:
|
|
raise dns.exception.SyntaxError("tag too long")
|
|
if not tag.isalnum():
|
|
raise dns.exception.SyntaxError("tag is not alphanumeric")
|
|
value = tok.get_string().encode()
|
|
return cls(rdclass, rdtype, flags, tag, value)
|
|
|
|
def to_wire(self, file, compress=None, origin=None):
|
|
file.write(struct.pack('!B', self.flags))
|
|
l = len(self.tag)
|
|
assert l < 256
|
|
file.write(struct.pack('!B', l))
|
|
file.write(self.tag)
|
|
file.write(self.value)
|
|
|
|
@classmethod
|
|
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
|
|
(flags, l) = struct.unpack('!BB', wire[current: current + 2])
|
|
current += 2
|
|
tag = wire[current: current + l]
|
|
value = wire[current + l:current + rdlen - 2]
|
|
return cls(rdclass, rdtype, flags, tag, value)
|