# 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 binascii
import dns.exception
import dns.immutable
import dns.rdata
import dns.tokenizer
@dns.immutable.immutable
class NSAP(dns.rdata.Rdata):
"""NSAP record."""
# see: RFC 1706
__slots__ = ["address"]
def __init__(self, rdclass, rdtype, address):
super().__init__(rdclass, rdtype)
self.address = self._as_bytes(address)
def to_text(self, origin=None, relativize=True, **kw):
return "0x%s" % binascii.hexlify(self.address).decode()
@classmethod
def from_text(
cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
):
address = tok.get_string()
if address[0:2] != "0x":
raise dns.exception.SyntaxError("string does not start with 0x")
address = address[2:].replace(".", "")
if len(address) % 2 != 0:
raise dns.exception.SyntaxError("hexstring has odd length")
address = binascii.unhexlify(address.encode())
return cls(rdclass, rdtype, address)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
file.write(self.address)
@classmethod
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
address = parser.get_remaining()
return cls(rdclass, rdtype, address)
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