/usr/share/pyshared/dns/wiredata.py is in python-dnspython 1.10.0-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | # Copyright (C) 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.
"""DNS Wire Data Helper"""
import sys
import dns.exception
class WireData(str):
# WireData is a string with stricter slicing
def __getitem__(self, key):
try:
return WireData(super(WireData, self).__getitem__(key))
except IndexError:
raise dns.exception.FormError
def __getslice__(self, i, j):
try:
if j == sys.maxint:
# handle the case where the right bound is unspecified
j = len(self)
if i < 0 or j < 0:
raise dns.exception.FormError
# If it's not an empty slice, access left and right bounds
# to make sure they're valid
if i != j:
super(WireData, self).__getitem__(i)
super(WireData, self).__getitem__(j - 1)
return WireData(super(WireData, self).__getslice__(i, j))
except IndexError:
raise dns.exception.FormError
def __iter__(self):
i = 0
while 1:
try:
yield self[i]
i += 1
except dns.exception.FormError:
raise StopIteration
def unwrap(self):
return str(self)
def maybe_wrap(wire):
if not isinstance(wire, WireData):
return WireData(wire)
else:
return wire
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