Package dns :: Module ipv4 |
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# Source Code for Module dns.ipv4

     1  # Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
     2  #
     3  # Permission to use, copy, modify, and distribute this software and its
     4  # documentation for any purpose with or without fee is hereby granted,
     5  # provided that the above copyright notice and this permission notice
     6  # appear in all copies.
     7  #
     8  # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
     9  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    10  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
    11  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    12  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    13  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
    14  # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    15
    16  """IPv4 helper functions."""
    17
    18  import socket
    19  import sys
    20
    21  if sys.hexversion < 0x02030000 or sys.platform == 'win32':
    22      #
    23      # Some versions of Python 2.2 have an inet_aton which rejects
    24      # the valid IP address '255.255.255.255'.  It appears this
    25      # problem is still present on the Win32 platform even in 2.3.
    26      # We'll work around the problem.
    27      #
    28 -    def inet_aton(text):
    29          if text == '255.255.255.255':
    30              return '\xff' * 4
    31          else:
    32              return socket.inet_aton(text)
    33  else:
    34      inet_aton = socket.inet_aton
    35
    36  inet_ntoa = socket.inet_ntoa
    37