sdk/platform-tools/systrace/catapult/telemetry/third_party/web-page-replay/third_party/dns/ipv4.py

   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