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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2003-2007, 2009-2011 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.
import binascii
import itertools
import socket
import unittest
import dns.exception
import dns.inet
import dns.ipv4
import dns.ipv6
# for convenience
aton4 = dns.ipv4.inet_aton
ntoa4 = dns.ipv4.inet_ntoa
aton6 = dns.ipv6.inet_aton
ntoa6 = dns.ipv6.inet_ntoa
v4_bad_addrs = [
"256.1.1.1",
"1.1.1",
"1.1.1.1.1",
"+1.1.1.1",
"1.1.1.1+",
"1..2.3.4",
".1.2.3.4",
"1.2.3.4.",
]
v4_canonicalize_addrs = [
# (input, expected)
("127.0.0.1", "127.0.0.1"),
(b"127.0.0.1", "127.0.0.1"),
]
v6_canonicalize_addrs = [
# (input, expected)
("2001:503:83eb:0:0:0:0:30", "2001:503:83eb::30"),
(b"2001:503:83eb:0:0:0:0:30", "2001:503:83eb::30"),
("2001:db8::1:1:1:1:1", "2001:db8:0:1:1:1:1:1"),
("2001:DB8::1:1:1:1:1", "2001:db8:0:1:1:1:1:1"),
]
bad_canonicalize_addrs = [
"127.00.0.1",
"hi there",
"2001::db8::1:1:1:1:1",
"fe80::1%lo0",
]
class NtoAAtoNTestCase(unittest.TestCase):
def test_aton1(self):
a = aton6("::")
self.assertEqual(a, b"\x00" * 16)
def test_aton2(self):
a = aton6("::1")
self.assertEqual(a, b"\x00" * 15 + b"\x01")
def test_aton3(self):
a = aton6("::10.0.0.1")
self.assertEqual(a, b"\x00" * 12 + b"\x0a\x00\x00\x01")
def test_aton4(self):
a = aton6("abcd::dcba")
self.assertEqual(a, b"\xab\xcd" + b"\x00" * 12 + b"\xdc\xba")
def test_aton5(self):
a = aton6("1:2:3:4:5:6:7:8")
self.assertEqual(a, binascii.unhexlify(b"00010002000300040005000600070008"))
def test_bad_aton1(self):
def bad():
aton6("abcd:dcba")
self.assertRaises(dns.exception.SyntaxError, bad)
def test_bad_aton2(self):
def bad():
aton6("abcd::dcba::1")
self.assertRaises(dns.exception.SyntaxError, bad)
def test_bad_aton3(self):
def bad():
aton6("1:2:3:4:5:6:7:8:9")
self.assertRaises(dns.exception.SyntaxError, bad)
def test_bad_aton4(self):
def bad():
aton4("001.002.003.004")
self.assertRaises(dns.exception.SyntaxError, bad)
def test_aton6(self):
a = aton6("::")
self.assertEqual(a, b"\x00" * 16)
def test_aton7(self):
a = aton6("::1")
self.assertEqual(a, b"\x00" * 15 + b"\x01")
def test_aton8(self):
a = aton6("::10.0.0.1")
self.assertEqual(a, b"\x00" * 12 + b"\x0a\x00\x00\x01")
def test_aton9(self):
a = aton6("abcd::dcba")
self.assertEqual(a, b"\xab\xcd" + b"\x00" * 12 + b"\xdc\xba")
def test_ntoa1(self):
b = binascii.unhexlify(b"00010002000300040005000600070008")
t = ntoa6(b)
self.assertEqual(t, "1:2:3:4:5:6:7:8")
def test_ntoa2(self):
b = b"\x00" * 16
t = ntoa6(b)
self.assertEqual(t, "::")
def test_ntoa3(self):
b = b"\x00" * 15 + b"\x01"
t = ntoa6(b)
self.assertEqual(t, "::1")
def test_ntoa4(self):
b = b"\x80" + b"\x00" * 15
t = ntoa6(b)
self.assertEqual(t, "8000::")
def test_ntoa5(self):
b = b"\x01\xcd" + b"\x00" * 12 + b"\x03\xef"
t = ntoa6(b)
self.assertEqual(t, "1cd::3ef")
def test_ntoa6(self):
b = binascii.unhexlify(b"ffff00000000ffff000000000000ffff")
t = ntoa6(b)
self.assertEqual(t, "ffff:0:0:ffff::ffff")
def test_ntoa7(self):
b = binascii.unhexlify(b"00000000ffff000000000000ffffffff")
t = ntoa6(b)
self.assertEqual(t, "0:0:ffff::ffff:ffff")
def test_ntoa8(self):
b = binascii.unhexlify(b"ffff0000ffff00000000ffff00000000")
t = ntoa6(b)
self.assertEqual(t, "ffff:0:ffff::ffff:0:0")
def test_ntoa9(self):
b = binascii.unhexlify(b"0000000000000000000000000a000001")
t = ntoa6(b)
self.assertEqual(t, "::10.0.0.1")
def test_ntoa10(self):
b = binascii.unhexlify(b"0000000000000000000000010a000001")
t = ntoa6(b)
self.assertEqual(t, "::1:a00:1")
def test_ntoa11(self):
b = binascii.unhexlify(b"00000000000000000000ffff0a000001")
t = ntoa6(b)
self.assertEqual(t, "::ffff:10.0.0.1")
def test_ntoa12(self):
b = binascii.unhexlify(b"000000000000000000000000ffffffff")
t = ntoa6(b)
self.assertEqual(t, "::255.255.255.255")
def test_ntoa13(self):
b = binascii.unhexlify(b"00000000000000000000ffffffffffff")
t = ntoa6(b)
self.assertEqual(t, "::ffff:255.255.255.255")
def test_ntoa14(self):
b = binascii.unhexlify(b"0000000000000000000000000001ffff")
t = ntoa6(b)
self.assertEqual(t, "::0.1.255.255")
def test_ntoa15(self):
# This exercises the current_len > best_len branch in the <= case.
b = binascii.unhexlify(b"0000ffff00000000ffff00000000ffff")
t = ntoa6(b)
self.assertEqual(t, "0:ffff::ffff:0:0:ffff")
def test_bad_ntoa1(self):
def bad():
ntoa6(b"")
self.assertRaises(ValueError, bad)
def test_bad_ntoa2(self):
def bad():
ntoa6(b"\x00" * 17)
self.assertRaises(ValueError, bad)
def test_bad_ntoa3(self):
def bad():
ntoa4(b"\x00" * 5)
# Ideally we'd have been consistent and raised ValueError as
# we do for IPv6, but oh well!
self.assertRaises(dns.exception.SyntaxError, bad)
def test_good_v4_aton(self):
pairs = [
("1.2.3.4", b"\x01\x02\x03\x04"),
("255.255.255.255", b"\xff\xff\xff\xff"),
("0.0.0.0", b"\x00\x00\x00\x00"),
]
for t, b in pairs:
b1 = aton4(t)
t1 = ntoa4(b1)
self.assertEqual(b1, b)
self.assertEqual(t1, t)
def test_bad_v4_aton(self):
def make_bad(a):
def bad():
return aton4(a)
return bad
for addr in v4_bad_addrs:
self.assertRaises(dns.exception.SyntaxError, make_bad(addr))
def test_bad_v6_aton(self):
addrs = ["+::0", "0::0::", "::0::", "1:2:3:4:5:6:7:8:9", ":::::::"]
embedded = ["::" + x for x in v4_bad_addrs]
addrs.extend(embedded)
def make_bad(a):
def bad():
x = aton6(a)
return bad
for addr in addrs:
self.assertRaises(dns.exception.SyntaxError, make_bad(addr))
def test_rfc5952_section_4_2_2(self):
addr = "2001:db8:0:1:1:1:1:1"
b1 = aton6(addr)
t1 = ntoa6(b1)
self.assertEqual(t1, addr)
def test_is_mapped(self):
t1 = "2001:db8:0:1:1:1:1:1"
t2 = "::ffff:127.0.0.1"
t3 = "1::ffff:127.0.0.1"
self.assertFalse(dns.ipv6.is_mapped(aton6(t1)))
self.assertTrue(dns.ipv6.is_mapped(aton6(t2)))
self.assertFalse(dns.ipv6.is_mapped(aton6(t3)))
def test_is_multicast(self):
t1 = "223.0.0.1"
t2 = "240.0.0.1"
t3 = "224.0.0.1"
t4 = "239.0.0.1"
t5 = "fe00::1"
t6 = "ff00::1"
self.assertFalse(dns.inet.is_multicast(t1))
self.assertFalse(dns.inet.is_multicast(t2))
self.assertTrue(dns.inet.is_multicast(t3))
self.assertTrue(dns.inet.is_multicast(t4))
self.assertFalse(dns.inet.is_multicast(t5))
self.assertTrue(dns.inet.is_multicast(t6))
def test_is_multicast_bad_input(self):
def bad():
dns.inet.is_multicast("hello world")
self.assertRaises(ValueError, bad)
def test_ignore_scope(self):
t1 = "fe80::1%lo0"
t2 = "fe80::1"
self.assertEqual(aton6(t1, True), aton6(t2))
def test_do_not_ignore_scope(self):
def bad():
t1 = "fe80::1%lo0"
aton6(t1)
self.assertRaises(dns.exception.SyntaxError, bad)
def test_multiple_scopes_bad(self):
def bad():
t1 = "fe80::1%lo0%lo1"
aton6(t1, True)
self.assertRaises(dns.exception.SyntaxError, bad)
def test_ptontop(self):
for af, a in [
(socket.AF_INET, "1.2.3.4"),
(socket.AF_INET6, "2001:db8:0:1:1:1:1:1"),
]:
self.assertEqual(dns.inet.inet_ntop(af, dns.inet.inet_pton(af, a)), a)
def test_isaddress(self):
for t, e in [
("1.2.3.4", True),
("2001:db8:0:1:1:1:1:1", True),
("hello world", False),
("http://www.dnspython.org", False),
("1.2.3.4a", False),
("2001:db8:0:1:1:1:1:q1", False),
]:
self.assertEqual(dns.inet.is_address(t), e)
def test_low_level_address_tuple(self):
t = dns.inet.low_level_address_tuple(("1.2.3.4", 53))
self.assertEqual(t, ("1.2.3.4", 53))
t = dns.inet.low_level_address_tuple(("2600::1", 53))
self.assertEqual(t, ("2600::1", 53, 0, 0))
t = dns.inet.low_level_address_tuple(("1.2.3.4", 53), socket.AF_INET)
self.assertEqual(t, ("1.2.3.4", 53))
t = dns.inet.low_level_address_tuple(("2600::1", 53), socket.AF_INET6)
self.assertEqual(t, ("2600::1", 53, 0, 0))
t = dns.inet.low_level_address_tuple(("fd80::1%2", 53), socket.AF_INET6)
self.assertEqual(t, ("fd80::1", 53, 0, 2))
try:
# This can fail on windows for python < 3.8, so we tolerate
# the failure and only test if we have something we can work
# with.
info = socket.if_nameindex()
except Exception:
info = []
if info:
# find first thing on list that is not zero (should be first thing!
pair = None
for p in info:
if p[0] != 0:
pair = p
break
if pair:
address = "fd80::1%" + pair[1]
t = dns.inet.low_level_address_tuple((address, 53), socket.AF_INET6)
self.assertEqual(t, ("fd80::1", 53, 0, pair[0]))
def bad():
bogus = socket.AF_INET + socket.AF_INET6 + 1
t = dns.inet.low_level_address_tuple(("2600::1", 53), bogus)
self.assertRaises(NotImplementedError, bad)
def test_bogus_family(self):
self.assertRaises(
NotImplementedError, lambda: dns.inet.inet_pton(12345, "bogus")
)
self.assertRaises(
NotImplementedError, lambda: dns.inet.inet_ntop(12345, b"bogus")
)
def test_ipv4_canonicalize(self):
for address, expected in v4_canonicalize_addrs:
self.assertEqual(dns.ipv4.canonicalize(address), expected)
for bad_address in bad_canonicalize_addrs:
self.assertRaises(
dns.exception.SyntaxError, lambda: dns.ipv4.canonicalize(bad_address)
)
def test_ipv6_canonicalize(self):
for address, expected in v6_canonicalize_addrs:
self.assertEqual(dns.ipv6.canonicalize(address), expected)
for bad_address in bad_canonicalize_addrs:
self.assertRaises(
dns.exception.SyntaxError, lambda: dns.ipv6.canonicalize(bad_address)
)
def test_inet_canonicalize(self):
for address, expected in itertools.chain(
v4_canonicalize_addrs, v6_canonicalize_addrs
):
self.assertEqual(dns.inet.canonicalize(address), expected)
for bad_address in bad_canonicalize_addrs:
self.assertRaises(ValueError, lambda: dns.inet.canonicalize(bad_address))
if __name__ == "__main__":
unittest.main()
|
