FM / dns

/usr/lib/python3.9/site-packages/dns

Name	Size	Mode	Actions
dnssecalgs/	-	0755	rm
quic/	-	0755	rm
rdtypes/	-	0755	rm
__pycache__/	-	0755	rm
asyncbackend.py	2796	0644	edit dl rm
asyncquery.py	26850	0644	edit dl rm
asyncresolver.py	17852	0644	edit dl rm
dnssec.py	40693	0644	edit dl rm
dnssectypes.py	1799	0644	edit dl rm
e164.py	3978	0644	edit dl rm
edns.py	15263	0644	edit dl rm
entropy.py	4242	0644	edit dl rm
enum.py	3691	0644	edit dl rm
exception.py	5957	0644	edit dl rm
flags.py	2750	0644	edit dl rm
grange.py	2148	0644	edit dl rm
immutable.py	2017	0644	edit dl rm
inet.py	5772	0644	edit dl rm
ipv4.py	2552	0644	edit dl rm
ipv6.py	6600	0644	edit dl rm
message.py	65993	0644	edit dl rm
name.py	42672	0644	edit dl rm
namedict.py	4000	0644	edit dl rm
nameserver.py	9909	0644	edit dl rm
node.py	12663	0644	edit dl rm
opcode.py	2730	0644	edit dl rm
query.py	54832	0644	edit dl rm
rcode.py	4156	0644	edit dl rm
rdata.py	29456	0644	edit dl rm
rdataclass.py	2984	0644	edit dl rm
rdataset.py	16756	0644	edit dl rm
rdatatype.py	7339	0644	edit dl rm
renderer.py	11254	0644	edit dl rm
resolver.py	73552	0644	edit dl rm
reversename.py	3828	0644	edit dl rm
rrset.py	9170	0644	edit dl rm
serial.py	3606	0644	edit dl rm
set.py	9088	0644	edit dl rm
tokenizer.py	23583	0644	edit dl rm
transaction.py	22636	0644	edit dl rm
tsig.py	11413	0644	edit dl rm
tsigkeyring.py	2633	0644	edit dl rm
ttl.py	2979	0644	edit dl rm
update.py	12243	0644	edit dl rm
version.py	1926	0644	edit dl rm
versioned.py	11765	0644	edit dl rm
win32util.py	9107	0644	edit dl rm
wire.py	2830	0644	edit dl rm
xfr.py	13273	0644	edit dl rm
zone.py	52086	0644	edit dl rm
zonefile.py	27929	0644	edit dl rm
zonetypes.py	690	0644	edit dl rm
_asyncbackend.py	2360	0644	edit dl rm
_asyncio_backend.py	8971	0644	edit dl rm
_ddr.py	5247	0644	edit dl rm
_features.py	2384	0644	edit dl rm
_immutable_ctx.py	2459	0644	edit dl rm
__init__.py	1663	0644	edit dl rm

Edit: /usr/lib/python3.9/site-packages/dns/e164.py (3978B)

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

# Copyright (C) 2006-2017 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 E.164 helpers."""

from typing import Iterable, Optional, Union

import dns.exception
import dns.name
import dns.resolver

#: The public E.164 domain.
public_enum_domain = dns.name.from_text("e164.arpa.")

def from_e164(
    text: str, origin: Optional[dns.name.Name] = public_enum_domain
) -> dns.name.Name:
    """Convert an E.164 number in textual form into a Name object whose
    value is the ENUM domain name for that number.

Non-digits in the text are ignored, i.e. "16505551212",
    "+1.650.555.1212" and "1 (650) 555-1212" are all the same.

*text*, a ``str``, is an E.164 number in textual form.

*origin*, a ``dns.name.Name``, the domain in which the number
    should be constructed.  The default is ``e164.arpa.``.

Returns a ``dns.name.Name``.
    """

parts = [d for d in text if d.isdigit()]
    parts.reverse()
    return dns.name.from_text(".".join(parts), origin=origin)

def to_e164(
    name: dns.name.Name,
    origin: Optional[dns.name.Name] = public_enum_domain,
    want_plus_prefix: bool = True,
) -> str:
    """Convert an ENUM domain name into an E.164 number.

Note that dnspython does not have any information about preferred
    number formats within national numbering plans, so all numbers are
    emitted as a simple string of digits, prefixed by a '+' (unless
    *want_plus_prefix* is ``False``).

*name* is a ``dns.name.Name``, the ENUM domain name.

*origin* is a ``dns.name.Name``, a domain containing the ENUM
    domain name.  The name is relativized to this domain before being
    converted to text.  If ``None``, no relativization is done.

*want_plus_prefix* is a ``bool``.  If True, add a '+' to the beginning of
    the returned number.

Returns a ``str``.

"""
    if origin is not None:
        name = name.relativize(origin)
    dlabels = [d for d in name.labels if d.isdigit() and len(d) == 1]
    if len(dlabels) != len(name.labels):
        raise dns.exception.SyntaxError("non-digit labels in ENUM domain name")
    dlabels.reverse()
    text = b"".join(dlabels)
    if want_plus_prefix:
        text = b"+" + text
    return text.decode()

def query(
    number: str,
    domains: Iterable[Union[dns.name.Name, str]],
    resolver: Optional[dns.resolver.Resolver] = None,
) -> dns.resolver.Answer:
    """Look for NAPTR RRs for the specified number in the specified domains.

e.g. lookup('16505551212', ['e164.dnspython.org.', 'e164.arpa.'])

*number*, a ``str`` is the number to look for.

*domains* is an iterable containing ``dns.name.Name`` values.

*resolver*, a ``dns.resolver.Resolver``, is the resolver to use.  If
    ``None``, the default resolver is used.
    """

if resolver is None:
        resolver = dns.resolver.get_default_resolver()
    e_nx = dns.resolver.NXDOMAIN()
    for domain in domains:
        if isinstance(domain, str):
            domain = dns.name.from_text(domain)
        qname = dns.e164.from_e164(number, domain)
        try:
            return resolver.resolve(qname, "NAPTR")
        except dns.resolver.NXDOMAIN as e:
            e_nx += e
    raise e_nx

cmd: