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