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📁 ..
📄 __init__.py(1.3 KB)
📁 __pycache__
📄 _compat.py(1.28 KB)
📄 dnssec.py(14.44 KB)
📄 e164.py(3.07 KB)
📄 edns.py(4.28 KB)
📄 entropy.py(4.36 KB)
📄 exception.py(4.52 KB)
📄 flags.py(2.6 KB)
📄 grange.py(1.93 KB)
📄 hash.py(1.07 KB)
📄 inet.py(3.17 KB)
📄 ipv4.py(1.98 KB)
📄 ipv6.py(5.17 KB)
📄 message.py(42.12 KB)
📄 name.py(28.74 KB)
📄 namedict.py(3.59 KB)
📄 node.py(5.91 KB)
📄 opcode.py(2.48 KB)
📄 query.py(19.18 KB)
📄 rcode.py(3.03 KB)
📄 rdata.py(14.65 KB)
📄 rdataclass.py(3.18 KB)
📄 rdataset.py(11.29 KB)
📄 rdatatype.py(5.21 KB)
📁 rdtypes
📄 renderer.py(11.64 KB)
📄 resolver.py(50.88 KB)
📄 reversename.py(3.23 KB)
📄 rrset.py(5.85 KB)
📄 set.py(7.53 KB)
📄 tokenizer.py(17.88 KB)
📄 tsig.py(7.54 KB)
📄 tsigkeyring.py(1.7 KB)
📄 ttl.py(2.23 KB)
📄 update.py(9.78 KB)
📄 version.py(1.23 KB)
📄 wiredata.py(3.64 KB)
📄 zone.py(39.09 KB)

Editing: inet.py

# Copyright (C) 2003-2007, 2009-2011 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

import dns.ipv4
import dns.ipv6

# We assume that AF_INET is always defined.

AF_INET = socket.AF_INET

# AF_INET6 might not be defined in the socket module, but we need it.
# We'll try to use the socket module's value, and if it doesn't work,
# we'll use our own value.

try:
    AF_INET6 = socket.AF_INET6
except AttributeError:
    AF_INET6 = 9999

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

@param family: the address family
    @type family: int
    @param text: the textual address
    @type text: string
    @raises NotImplementedError: the address family specified is not
    implemented.
    @rtype: string
    """

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

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

@param family: the address family
    @type family: int
    @param address: the binary address
    @type address: string
    @raises NotImplementedError: the address family specified is not
    implemented.
    @rtype: string
    """
    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):
    """Determine the address family of a textual-form network address.

@param text: the textual address
    @type text: string
    @raises ValueError: the address family cannot be determined from the input.
    @rtype: int
    """
    try:
        dns.ipv4.inet_aton(text)
        return AF_INET
    except Exception:
        try:
            dns.ipv6.inet_aton(text)
            return AF_INET6
        except:
            raise ValueError

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

@param text: the textual address
    @raises ValueError: the address family cannot be determined from the input.
    @rtype: bool
    """
    try:
        first = ord(dns.ipv4.inet_aton(text)[0])
        return first >= 224 and first <= 239
    except Exception:
        try:
            first = ord(dns.ipv6.inet_aton(text)[0])
            return first == 255
        except Exception:
            raise ValueError

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