1# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license 2 3# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc. 4# 5# Permission to use, copy, modify, and distribute this software and its 6# documentation for any purpose with or without fee is hereby granted, 7# provided that the above copyright notice and this permission notice 8# appear in all copies. 9# 10# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES 11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR 13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 16# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18import binascii 19 20import dns.exception 21import dns.rdata 22import dns.tokenizer 23 24 25class NSAP(dns.rdata.Rdata): 26 27 """NSAP record.""" 28 29 # see: RFC 1706 30 31 __slots__ = ['address'] 32 33 def __init__(self, rdclass, rdtype, address): 34 super().__init__(rdclass, rdtype) 35 object.__setattr__(self, 'address', address) 36 37 def to_text(self, origin=None, relativize=True, **kw): 38 return "0x%s" % binascii.hexlify(self.address).decode() 39 40 @classmethod 41 def from_text(cls, rdclass, rdtype, tok, origin=None, relativize=True, 42 relativize_to=None): 43 address = tok.get_string() 44 tok.get_eol() 45 if address[0:2] != '0x': 46 raise dns.exception.SyntaxError('string does not start with 0x') 47 address = address[2:].replace('.', '') 48 if len(address) % 2 != 0: 49 raise dns.exception.SyntaxError('hexstring has odd length') 50 address = binascii.unhexlify(address.encode()) 51 return cls(rdclass, rdtype, address) 52 53 def _to_wire(self, file, compress=None, origin=None, canonicalize=False): 54 file.write(self.address) 55 56 @classmethod 57 def from_wire_parser(cls, rdclass, rdtype, parser, origin=None): 58 address = parser.get_remaining() 59 return cls(rdclass, rdtype, address) 60