# 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 struct
import dns.exception
import dns.immutable
import dns.rdata
import dns.tokenizer
[docs]
@dns.immutable.immutable
class ISDN(dns.rdata.Rdata):
"""ISDN record"""
# see: RFC 1183
__slots__ = ["address", "subaddress"]
def __init__(self, rdclass, rdtype, address, subaddress):
super().__init__(rdclass, rdtype)
self.address = self._as_bytes(address, True, 255)
self.subaddress = self._as_bytes(subaddress, True, 255)
[docs]
def to_text(self, origin=None, relativize=True, **kw):
if self.subaddress:
return '"{}" "{}"'.format(
dns.rdata._escapify(self.address), dns.rdata._escapify(self.subaddress)
)
else:
return '"%s"' % dns.rdata._escapify(self.address)
@classmethod
def from_text(
cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
):
address = tok.get_string()
tokens = tok.get_remaining(max_tokens=1)
if len(tokens) >= 1:
subaddress = tokens[0].unescape().value
else:
subaddress = ""
return cls(rdclass, rdtype, address, subaddress)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
l = len(self.address)
assert l < 256
file.write(struct.pack("!B", l))
file.write(self.address)
l = len(self.subaddress)
if l > 0:
assert l < 256
file.write(struct.pack("!B", l))
file.write(self.subaddress)
@classmethod
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
address = parser.get_counted_bytes()
if parser.remaining() > 0:
subaddress = parser.get_counted_bytes()
else:
subaddress = b""
return cls(rdclass, rdtype, address, subaddress)