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# 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.rdata
import dns.tokenizer
class NSAP(dns.rdata.Rdata):
"""NSAP record.
@ivar address: a NASP
@type address: string
@see: RFC 1706"""
__slots__ = ['address']
def __init__(self, rdclass, rdtype, address):
super(NSAP, self).__init__(rdclass, rdtype)
self.address = 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):
address = tok.get_string()
tok.get_eol()
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):
file.write(self.address)
@classmethod
def from_wire(cls, rdclass, rdtype, wire, current, rdlen, origin=None):
address = wire[current: current + rdlen].unwrap()
return cls(rdclass, rdtype, address)