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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: ipv4.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.

"""IPv4 helper functions."""

import struct

import dns.exception
from ._compat import binary_type

def inet_ntoa(address):
    """Convert an IPv4 address in network form to text form.

@param address: The IPv4 address
    @type address: string
    @returns: string
    """
    if len(address) != 4:
        raise dns.exception.SyntaxError
    if not isinstance(address, bytearray):
        address = bytearray(address)
    return (u'%u.%u.%u.%u' % (address[0], address[1],
                              address[2], address[3])).encode()

def inet_aton(text):
    """Convert an IPv4 address in text form to network form.

@param text: The IPv4 address
    @type text: string
    @returns: string
    """
    if not isinstance(text, binary_type):
        text = text.encode()
    parts = text.split(b'.')
    if len(parts) != 4:
        raise dns.exception.SyntaxError
    for part in parts:
        if not part.isdigit():
            raise dns.exception.SyntaxError
        if len(part) > 1 and part[0] == '0':
            # No leading zeros
            raise dns.exception.SyntaxError
    try:
        bytes = [int(part) for part in parts]
        return struct.pack('BBBB', *bytes)
    except:
        raise dns.exception.SyntaxError

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