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""" Basic ip6trie dataset Tests
"""
import unittest
from rbldnsd import Rbldnsd, ZoneFile
__all__ = [
'TestIp6TrieDataset',
]
def ip6trie(zone_data):
""" Run rbldnsd with an ip6trie dataset
"""
dnsd = Rbldnsd()
dnsd.add_dataset('ip6trie', ZoneFile(zone_data))
return dnsd
class TestIp6TrieDataset(unittest.TestCase):
def test_exclusion(self):
with ip6trie(["dead::/16 listed",
"!dead::beef"]) as dnsd:
self.assertEqual(dnsd.query(rfc3152("dead::beef")), None)
self.assertEqual(dnsd.query(rfc3152("dead::beee")), b"listed")
def rfc3152(ip6addr, domain='example.com'):
return "%s.%s" % ('.'.join(reversed(_to_nibbles(ip6addr))), domain)
def _to_nibbles(ip6addr):
""" Convert ip6 address (in rfc4291 notation) to a sequence of nibbles
NB: We avoid the use of socket.inet_pton(AF_INET6, ip6addr) here
because it fails (with 'error: can't use AF_INET6, IPv6 is
disabled') when python has been compiled without IPv6 support. See
http://www.corpit.ru/pipermail/rbldnsd/2013q3/001181.html
"""
def _split_words(addr):
return [ int(w, 16) for w in addr.split(':') ] if addr else []
if '::' in ip6addr:
head, tail = [ _split_words(s) for s in ip6addr.split('::', 1) ]
nzeros = 8 - len(head) - len(tail)
assert nzeros >= 0
words = head + [ 0 ] * nzeros + tail
else:
words = _split_words(ip6addr)
assert len(words) == 8
for word in words:
assert 0 <= word <= 0xffff
return ''.join("%04x" % word for word in words)
if __name__ == '__main__':
unittest.main()
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