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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 Result Codes."""

import dns.exception
from ._compat import long

#: No error
NOERROR = 0
#: Form error
FORMERR = 1
#: Server failure
SERVFAIL = 2
#: Name does not exist ("Name Error" in RFC 1025 terminology).
NXDOMAIN = 3
#: Not implemented
NOTIMP = 4
#: Refused
REFUSED = 5
#: Name exists.
YXDOMAIN = 6
#: RRset exists.
YXRRSET = 7
#: RRset does not exist.
NXRRSET = 8
#: Not authoritative.
NOTAUTH = 9
#: Name not in zone.
NOTZONE = 10
#: Bad EDNS version.
BADVERS = 16

_by_text = {
    'NOERROR': NOERROR,
    'FORMERR': FORMERR,
    'SERVFAIL': SERVFAIL,
    'NXDOMAIN': NXDOMAIN,
    'NOTIMP': NOTIMP,
    'REFUSED': REFUSED,
    'YXDOMAIN': YXDOMAIN,
    'YXRRSET': YXRRSET,
    'NXRRSET': NXRRSET,
    'NOTAUTH': NOTAUTH,
    'NOTZONE': NOTZONE,
    'BADVERS': BADVERS
}

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

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

class UnknownRcode(dns.exception.DNSException):
    """A DNS rcode is unknown."""

def from_text(text):
    """Convert text into an rcode.

*text*, a ``text``, the textual rcode or an integer in textual form.

Raises ``dns.rcode.UnknownRcode`` if the rcode mnemonic is unknown.

Returns an ``int``.
    """

if text.isdigit():
        v = int(text)
        if v >= 0 and v <= 4095:
            return v
    v = _by_text.get(text.upper())
    if v is None:
        raise UnknownRcode
    return v

def from_flags(flags, ednsflags):
    """Return the rcode value encoded by flags and ednsflags.

*flags*, an ``int``, the DNS flags field.

*ednsflags*, an ``int``, the EDNS flags field.

Raises ``ValueError`` if rcode is < 0 or > 4095

Returns an ``int``.
    """

value = (flags & 0x000f) | ((ednsflags >> 20) & 0xff0)
    if value < 0 or value > 4095:
        raise ValueError('rcode must be >= 0 and <= 4095')
    return value

def to_flags(value):
    """Return a (flags, ednsflags) tuple which encodes the rcode.

*value*, an ``int``, the rcode.

Raises ``ValueError`` if rcode is < 0 or > 4095.

Returns an ``(int, int)`` tuple.
    """

if value < 0 or value > 4095:
        raise ValueError('rcode must be >= 0 and <= 4095')
    v = value & 0xf
    ev = long(value & 0xff0) << 20
    return (v, ev)

def to_text(value):
    """Convert rcode into text.

*value*, and ``int``, the rcode.

Raises ``ValueError`` if rcode is < 0 or > 4095.

Returns a ``text``.
    """

if value < 0 or value > 4095:
        raise ValueError('rcode must be >= 0 and <= 4095')
    text = _by_value.get(value)
    if text is None:
        text = str(value)
    return text