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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# 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 dns.rdtypes.mxbase
import struct
class A(dns.rdtypes.mxbase.MXBase):
"""A record for Chaosnet"""
# domain: the domain of the address
# address: the 16-bit address
__slots__ = ['domain', 'address']
def __init__(self, rdclass, rdtype, address, domain):
super(A, self).__init__(rdclass, rdtype, address, domain)
object.__setattr__(self, 'domain', domain)
object.__setattr__(self, 'address', address)
def to_text(self, origin=None, relativize=True, **kw):
domain = self.domain.choose_relativity(origin, relativize)
return '%s %o' % (domain, self.address)
@classmethod
def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True,
relativize_to=None):
domain = tok.get_name(origin, relativize, relativize_to)
address = tok.get_uint16(base=8)
tok.get_eol()
return cls(rdclass, rdtype, address, domain)
def to_wire(self, file, compress=None, origin=None):
self.domain.to_wire(file, compress, origin)
pref = struct.pack("!H", self.address)
file.write(pref)
def to_digestable(self, origin=None):
return self.domain.to_digestable(origin) + \
struct.pack("!H", self.address)
@classmethod
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
(domain, cused) = dns.name.from_wire(wire[:current + rdlen - 2],
current)
current += cused
(address,) = struct.unpack('!H', wire[current:current + 2])
if cused + 2 != rdlen:
raise dns.exception.FormError
if origin is not None:
domain = domain.relativize(origin)
return cls(rdclass, rdtype, address, domain)
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