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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
dnssecalgs	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
quic	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
rdtypes	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
__init__.py	1.62 KB	-rw-r--r--	2025-04-04 08:00
_asyncbackend.py	2.34 KB	-rw-r--r--	2025-04-04 08:00
_asyncio_backend.py	8.84 KB	-rw-r--r--	2025-04-04 08:00
_ddr.py	5.12 KB	-rw-r--r--	2025-04-04 08:00
_features.py	2.43 KB	-rw-r--r--	2025-04-04 08:00
_immutable_ctx.py	2.4 KB	-rw-r--r--	2025-04-04 08:00
_trio_backend.py	8.27 KB	-rw-r--r--	2025-04-04 08:00
asyncbackend.py	2.73 KB	-rw-r--r--	2025-04-04 08:00
asyncquery.py	30.1 KB	-rw-r--r--	2025-04-04 08:00
asyncresolver.py	17.43 KB	-rw-r--r--	2025-04-04 08:00
dnssec.py	40.74 KB	-rw-r--r--	2025-04-04 08:00
dnssectypes.py	1.76 KB	-rw-r--r--	2025-04-04 08:00
e164.py	3.88 KB	-rw-r--r--	2025-04-04 08:00
edns.py	16.69 KB	-rw-r--r--	2025-04-04 08:00
entropy.py	4.14 KB	-rw-r--r--	2025-04-04 08:00
enum.py	3.6 KB	-rw-r--r--	2025-04-04 08:00
exception.py	5.81 KB	-rw-r--r--	2025-04-04 08:00
flags.py	2.69 KB	-rw-r--r--	2025-04-04 08:00
grange.py	2.09 KB	-rw-r--r--	2025-04-04 08:00
immutable.py	1.97 KB	-rw-r--r--	2025-04-04 08:00
inet.py	5.64 KB	-rw-r--r--	2025-04-04 08:00
ipv4.py	2.49 KB	-rw-r--r--	2025-04-04 08:00
ipv6.py	6.4 KB	-rw-r--r--	2025-04-04 08:00
message.py	66.59 KB	-rw-r--r--	2025-04-04 08:00
name.py	41.78 KB	-rw-r--r--	2025-04-04 08:00
namedict.py	3.91 KB	-rw-r--r--	2025-04-04 08:00
nameserver.py	9.88 KB	-rw-r--r--	2025-04-04 08:00
node.py	12.37 KB	-rw-r--r--	2025-04-04 08:00
opcode.py	2.67 KB	-rw-r--r--	2025-04-04 08:00
py.typed	0 B	-rw-r--r--	2025-04-04 08:00
query.py	54.98 KB	-rw-r--r--	2025-04-04 08:00
rcode.py	4.06 KB	-rw-r--r--	2025-04-04 08:00
rdata.py	30.29 KB	-rw-r--r--	2025-04-04 08:00
rdataclass.py	2.91 KB	-rw-r--r--	2025-04-04 08:00
rdataset.py	16.27 KB	-rw-r--r--	2025-04-04 08:00
rdatatype.py	7.27 KB	-rw-r--r--	2025-04-04 08:00
renderer.py	10.99 KB	-rw-r--r--	2025-04-04 08:00
resolver.py	72 KB	-rw-r--r--	2025-04-04 08:00
reversename.py	3.74 KB	-rw-r--r--	2025-04-04 08:00
rrset.py	8.96 KB	-rw-r--r--	2025-04-04 08:00
serial.py	3.52 KB	-rw-r--r--	2025-04-04 08:00
set.py	9 KB	-rw-r--r--	2025-04-04 08:00
tokenizer.py	23.03 KB	-rw-r--r--	2025-04-04 08:00
transaction.py	22.06 KB	-rw-r--r--	2025-04-04 08:00
tsig.py	11.15 KB	-rw-r--r--	2025-04-04 08:00
tsigkeyring.py	2.57 KB	-rw-r--r--	2025-04-04 08:00
ttl.py	2.91 KB	-rw-r--r--	2025-04-04 08:00
update.py	11.96 KB	-rw-r--r--	2025-04-04 08:00
version.py	1.88 KB	-rw-r--r--	2025-04-04 08:00
versioned.py	11.49 KB	-rw-r--r--	2025-04-04 08:00
win32util.py	8.67 KB	-rw-r--r--	2025-04-04 08:00
wire.py	2.76 KB	-rw-r--r--	2025-04-04 08:00
xfr.py	12.96 KB	-rw-r--r--	2025-04-04 08:00
zone.py	50.87 KB	-rw-r--r--	2025-04-04 08:00
zonefile.py	27.27 KB	-rw-r--r--	2025-04-04 08:00
zonetypes.py	690 B	-rw-r--r--	2025-04-04 08:00

Rename

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

# Copyright (C) 2003-2017 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.

"""Generic Internet address helper functions."""

import socket
from typing import Any, Optional, Tuple

import dns.ipv4
import dns.ipv6

# We assume that AF_INET and AF_INET6 are always defined.  We keep
# these here for the benefit of any old code (unlikely though that
# is!).
AF_INET = socket.AF_INET
AF_INET6 = socket.AF_INET6

def inet_pton(family: int, text: str) -> bytes:
    """Convert the textual form of a network address into its binary form.

*family* is an ``int``, the address family.

*text* is a ``str``, the textual address.

Raises ``NotImplementedError`` if the address family specified is not
    implemented.

Returns a ``bytes``.
    """

if family == AF_INET:
        return dns.ipv4.inet_aton(text)
    elif family == AF_INET6:
        return dns.ipv6.inet_aton(text, True)
    else:
        raise NotImplementedError

def inet_ntop(family: int, address: bytes) -> str:
    """Convert the binary form of a network address into its textual form.

*family* is an ``int``, the address family.

*address* is a ``bytes``, the network address in binary form.

Raises ``NotImplementedError`` if the address family specified is not
    implemented.

Returns a ``str``.
    """

if family == AF_INET:
        return dns.ipv4.inet_ntoa(address)
    elif family == AF_INET6:
        return dns.ipv6.inet_ntoa(address)
    else:
        raise NotImplementedError

def af_for_address(text: str) -> int:
    """Determine the address family of a textual-form network address.

*text*, a ``str``, the textual address.

Raises ``ValueError`` if the address family cannot be determined
    from the input.

Returns an ``int``.
    """

try:
        dns.ipv4.inet_aton(text)
        return AF_INET
    except Exception:
        try:
            dns.ipv6.inet_aton(text, True)
            return AF_INET6
        except Exception:
            raise ValueError

def is_multicast(text: str) -> bool:
    """Is the textual-form network address a multicast address?

*text*, a ``str``, the textual address.

Raises ``ValueError`` if the address family cannot be determined
    from the input.

Returns a ``bool``.
    """

try:
        first = dns.ipv4.inet_aton(text)[0]
        return first >= 224 and first <= 239
    except Exception:
        try:
            first = dns.ipv6.inet_aton(text, True)[0]
            return first == 255
        except Exception:
            raise ValueError

def is_address(text: str) -> bool:
    """Is the specified string an IPv4 or IPv6 address?

*text*, a ``str``, the textual address.

Returns a ``bool``.
    """

try:
        dns.ipv4.inet_aton(text)
        return True
    except Exception:
        try:
            dns.ipv6.inet_aton(text, True)
            return True
        except Exception:
            return False

def low_level_address_tuple(
    high_tuple: Tuple[str, int], af: Optional[int] = None
) -> Any:
    """Given a "high-level" address tuple, i.e.
    an (address, port) return the appropriate "low-level" address tuple
    suitable for use in socket calls.

If an *af* other than ``None`` is provided, it is assumed the
    address in the high-level tuple is valid and has that af.  If af
    is ``None``, then af_for_address will be called.
    """
    address, port = high_tuple
    if af is None:
        af = af_for_address(address)
    if af == AF_INET:
        return (address, port)
    elif af == AF_INET6:
        i = address.find("%")
        if i < 0:
            # no scope, shortcut!
            return (address, port, 0, 0)
        # try to avoid getaddrinfo()
        addrpart = address[:i]
        scope = address[i + 1 :]
        if scope.isdigit():
            return (addrpart, port, 0, int(scope))
        try:
            return (addrpart, port, 0, socket.if_nametoindex(scope))
        except AttributeError:  # pragma: no cover  (we can't really test this)
            ai_flags = socket.AI_NUMERICHOST
            ((*_, tup), *_) = socket.getaddrinfo(address, port, flags=ai_flags)
            return tup
    else:
        raise NotImplementedError(f"unknown address family {af}")

def any_for_af(af):
    """Return the 'any' address for the specified address family."""
    if af == socket.AF_INET:
        return "0.0.0.0"
    elif af == socket.AF_INET6:
        return "::"
    raise NotImplementedError(f"unknown address family {af}")

def canonicalize(text: str) -> str:
    """Verify that *address* is a valid text form IPv4 or IPv6 address and return its
    canonical text form.  IPv6 addresses with scopes are rejected.

*text*, a ``str``, the address in textual form.

Raises ``ValueError`` if the text is not valid.
    """
    try:
        return dns.ipv6.canonicalize(text)
    except Exception:
        try:
            return dns.ipv4.canonicalize(text)
        except Exception:
            raise ValueError