Source code for dns.rdtypes.IN.NAPTR

# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
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import struct

import dns.exception
import dns.immutable
import dns.name
import dns.rdata
import dns.rdtypes.util


def _write_string(file, s):
    l = len(s)
    assert l < 256
    file.write(struct.pack("!B", l))
    file.write(s)


[docs] @dns.immutable.immutable class NAPTR(dns.rdata.Rdata): """NAPTR record""" # see: RFC 3403 __slots__ = ["order", "preference", "flags", "service", "regexp", "replacement"] def __init__( self, rdclass, rdtype, order, preference, flags, service, regexp, replacement ): super().__init__(rdclass, rdtype) self.flags = self._as_bytes(flags, True, 255) self.service = self._as_bytes(service, True, 255) self.regexp = self._as_bytes(regexp, True, 255) self.order = self._as_uint16(order) self.preference = self._as_uint16(preference) self.replacement = self._as_name(replacement)
[docs] def to_text(self, origin=None, relativize=True, **kw): replacement = self.replacement.choose_relativity(origin, relativize) return '%d %d "%s" "%s" "%s" %s' % ( self.order, self.preference, dns.rdata._escapify(self.flags), dns.rdata._escapify(self.service), dns.rdata._escapify(self.regexp), replacement, )
@classmethod def from_text( cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None ): order = tok.get_uint16() preference = tok.get_uint16() flags = tok.get_string() service = tok.get_string() regexp = tok.get_string() replacement = tok.get_name(origin, relativize, relativize_to) return cls( rdclass, rdtype, order, preference, flags, service, regexp, replacement ) def _to_wire(self, file, compress=None, origin=None, canonicalize=False): two_ints = struct.pack("!HH", self.order, self.preference) file.write(two_ints) _write_string(file, self.flags) _write_string(file, self.service) _write_string(file, self.regexp) self.replacement.to_wire(file, compress, origin, canonicalize) @classmethod def from_wire_parser(cls, rdclass, rdtype, parser, origin=None): (order, preference) = parser.get_struct("!HH") strings = [] for _ in range(3): s = parser.get_counted_bytes() strings.append(s) replacement = parser.get_name(origin) return cls( rdclass, rdtype, order, preference, strings[0], strings[1], strings[2], replacement, ) def _processing_priority(self): return (self.order, self.preference) @classmethod def _processing_order(cls, iterable): return dns.rdtypes.util.priority_processing_order(iterable)