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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-06-08 18:08
rdtypes	[ DIR ]	drwxr-xr-x	2026-06-08 18:08
LICENSE	1.49 KB	-rw-r--r--	1980-01-01 08:00
__init__.py	1.37 KB	-rw-r--r--	1980-01-01 08:00
_compat.py	1.47 KB	-rw-r--r--	1980-01-01 08:00
dnssec.py	16.12 KB	-rw-r--r--	1980-01-01 08:00
e164.py	3.67 KB	-rw-r--r--	1980-01-01 08:00
edns.py	7.25 KB	-rw-r--r--	1980-01-01 08:00
entropy.py	4.66 KB	-rw-r--r--	1980-01-01 08:00
exception.py	4.76 KB	-rw-r--r--	1980-01-01 08:00
flags.py	2.86 KB	-rw-r--r--	1980-01-01 08:00
grange.py	2.01 KB	-rw-r--r--	1980-01-01 08:00
hash.py	1.29 KB	-rw-r--r--	1980-01-01 08:00
inet.py	3.3 KB	-rw-r--r--	1980-01-01 08:00
ipv4.py	2.05 KB	-rw-r--r--	1980-01-01 08:00
ipv6.py	5.4 KB	-rw-r--r--	1980-01-01 08:00
message.py	40.49 KB	-rw-r--r--	1980-01-01 08:00
name.py	30.53 KB	-rw-r--r--	1980-01-01 08:00
namedict.py	3.87 KB	-rw-r--r--	1980-01-01 08:00
node.py	6.2 KB	-rw-r--r--	1980-01-01 08:00
opcode.py	2.77 KB	-rw-r--r--	1980-01-01 08:00
query.py	23.14 KB	-rw-r--r--	1980-01-01 08:00
rcode.py	3.53 KB	-rw-r--r--	1980-01-01 08:00
rdata.py	14.11 KB	-rw-r--r--	1980-01-01 08:00
rdataclass.py	3.14 KB	-rw-r--r--	1980-01-01 08:00
rdataset.py	11.19 KB	-rw-r--r--	1980-01-01 08:00
rdatatype.py	5.78 KB	-rw-r--r--	1980-01-01 08:00
renderer.py	10.57 KB	-rw-r--r--	1980-01-01 08:00
resolver.py	49.03 KB	-rw-r--r--	1980-01-01 08:00
reversename.py	3.21 KB	-rw-r--r--	1980-01-01 08:00
rrset.py	6.01 KB	-rw-r--r--	1980-01-01 08:00
set.py	7.14 KB	-rw-r--r--	1980-01-01 08:00
tokenizer.py	17.62 KB	-rw-r--r--	1980-01-01 08:00
tsig.py	7.63 KB	-rw-r--r--	1980-01-01 08:00
tsigkeyring.py	1.77 KB	-rw-r--r--	1980-01-01 08:00
ttl.py	2.29 KB	-rw-r--r--	1980-01-01 08:00
update.py	10.1 KB	-rw-r--r--	1980-01-01 08:00
version.py	1.37 KB	-rw-r--r--	1980-01-01 08:00
wiredata.py	3.66 KB	-rw-r--r--	1980-01-01 08:00
zone.py	41.39 KB	-rw-r--r--	1980-01-01 08:00

Rename

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

# Copyright (C) 2001-2017 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.

"""DNS Message Flags."""

# Standard DNS flags

#: Query Response
QR = 0x8000
#: Authoritative Answer
AA = 0x0400
#: Truncated Response
TC = 0x0200
#: Recursion Desired
RD = 0x0100
#: Recursion Available
RA = 0x0080
#: Authentic Data
AD = 0x0020
#: Checking Disabled
CD = 0x0010

# EDNS flags

#: DNSSEC answer OK
DO = 0x8000

_by_text = {
    'QR': QR,
    'AA': AA,
    'TC': TC,
    'RD': RD,
    'RA': RA,
    'AD': AD,
    'CD': CD
}

_edns_by_text = {
    'DO': DO
}

# We construct the inverse mappings programmatically to ensure that we
# cannot make any mistakes (e.g. omissions, cut-and-paste errors) that
# would cause the mappings not to be true inverses.

_by_value = {y: x for x, y in _by_text.items()}

_edns_by_value = {y: x for x, y in _edns_by_text.items()}

def _order_flags(table):
    order = list(table.items())
    order.sort()
    order.reverse()
    return order

_flags_order = _order_flags(_by_value)

_edns_flags_order = _order_flags(_edns_by_value)

def _from_text(text, table):
    flags = 0
    tokens = text.split()
    for t in tokens:
        flags = flags | table[t.upper()]
    return flags

def _to_text(flags, table, order):
    text_flags = []
    for k, v in order:
        if flags & k != 0:
            text_flags.append(v)
    return ' '.join(text_flags)

def from_text(text):
    """Convert a space-separated list of flag text values into a flags
    value.

Returns an ``int``
    """

return _from_text(text, _by_text)

def to_text(flags):
    """Convert a flags value into a space-separated list of flag text
    values.

Returns a ``text``.
    """

return _to_text(flags, _by_value, _flags_order)

def edns_from_text(text):
    """Convert a space-separated list of EDNS flag text values into a EDNS
    flags value.

Returns an ``int``
    """

return _from_text(text, _edns_by_text)

def edns_to_text(flags):
    """Convert an EDNS flags value into a space-separated list of EDNS flag
    text values.

Returns a ``text``.
    """

return _to_text(flags, _edns_by_value, _edns_flags_order)