Python 2.7.6 Windows bug in __getslice__ in wiredata.py
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Matthäus Wander
Jul 24, 2014, 8:50:23 AM7/24/14
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Hi,
__getslice__ in wiredata.py assumes that the right bound will be set to
sys.maxint if unspecified. This not true with 64 bit Python 2.7.6 on
Windows, where sys.maxint is 2^(31)-1 but the right bound is 2^(63)-1.
The bug can be observed when parsing a DNS message with a ::ffff:1.2.3.4
address in AAAA record. The slicing triggers an IndexError which raises
a FormError only on Windows. Example code and bugfix attached.
Thanks for providing dnspython!
Matt
__getslice__ in wiredata.py assumes that the right bound will be set to
sys.maxint if unspecified. This not true with 64 bit Python 2.7.6 on
Windows, where sys.maxint is 2^(31)-1 but the right bound is 2^(63)-1.
The bug can be observed when parsing a DNS message with a ::ffff:1.2.3.4
address in AAAA record. The slicing triggers an IndexError which raises
a FormError only on Windows. Example code and bugfix attached.
Thanks for providing dnspython!
Matt
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