# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
import struct
import dns.immutable
import dns.rdtypes.util
@dns.immutable.immutable
class NID(dns.rdata.Rdata):
"""NID record"""
# see: rfc6742.txt
__slots__ = ["preference", "nodeid"]
def __init__(self, rdclass, rdtype, preference, nodeid):
super().__init__(rdclass, rdtype)
self.preference = self._as_uint16(preference)
if isinstance(nodeid, bytes):
if len(nodeid) != 8:
raise ValueError("invalid nodeid")
self.nodeid = dns.rdata._hexify(nodeid, 4, b":")
else:
dns.rdtypes.util.parse_formatted_hex(nodeid, 4, 4, ":")
self.nodeid = nodeid
def to_text(self, origin=None, relativize=True, **kw):
return f"{self.preference} {self.nodeid}"
@classmethod
def from_text(
cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
):
preference = tok.get_uint16()
nodeid = tok.get_identifier()
return cls(rdclass, rdtype, preference, nodeid)
def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
file.write(struct.pack("!H", self.preference))
file.write(dns.rdtypes.util.parse_formatted_hex(self.nodeid, 4, 4, ":"))
@classmethod
def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
preference = parser.get_uint16()
nodeid = parser.get_remaining()
return cls(rdclass, rdtype, preference, nodeid)
|