diff options
| -rw-r--r-- | Lib/ipaddress.py | 5 | ||||
| -rw-r--r-- | Lib/test/test_ipaddress.py | 16 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2024-04-05-15-51-01.gh-issue-117566.54nABf.rst | 3 |
3 files changed, 23 insertions, 1 deletions
diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py index 22cdfc9..8e4d49c 100644 --- a/Lib/ipaddress.py +++ b/Lib/ipaddress.py @@ -2142,6 +2142,9 @@ class IPv6Address(_BaseV6, _BaseAddress): RFC 2373 2.5.3. """ + ipv4_mapped = self.ipv4_mapped + if ipv4_mapped is not None: + return ipv4_mapped.is_loopback return self._ip == 1 @property @@ -2258,7 +2261,7 @@ class IPv6Interface(IPv6Address): @property def is_loopback(self): - return self._ip == 1 and self.network.is_loopback + return super().is_loopback and self.network.is_loopback class IPv6Network(_BaseV6, _BaseNetwork): diff --git a/Lib/test/test_ipaddress.py b/Lib/test/test_ipaddress.py index f1519df..c3ecf2a 100644 --- a/Lib/test/test_ipaddress.py +++ b/Lib/test/test_ipaddress.py @@ -2446,6 +2446,22 @@ class IpaddrUnitTest(unittest.TestCase): self.assertEqual( False, ipaddress.ip_address('::ffff:172.32.0.0').is_private) + def testIpv4MappedLoopbackCheck(self): + # test networks + self.assertEqual(True, ipaddress.ip_network( + '::ffff:127.100.200.254/128').is_loopback) + self.assertEqual(True, ipaddress.ip_network( + '::ffff:127.42.0.0/112').is_loopback) + self.assertEqual(False, ipaddress.ip_network( + '::ffff:128.0.0.0').is_loopback) + # test addresses + self.assertEqual(True, ipaddress.ip_address( + '::ffff:127.100.200.254').is_loopback) + self.assertEqual(True, ipaddress.ip_address( + '::ffff:127.42.0.0').is_loopback) + self.assertEqual(False, ipaddress.ip_address( + '::ffff:128.0.0.0').is_loopback) + def testAddrExclude(self): addr1 = ipaddress.ip_network('10.1.1.0/24') addr2 = ipaddress.ip_network('10.1.1.0/26') diff --git a/Misc/NEWS.d/next/Library/2024-04-05-15-51-01.gh-issue-117566.54nABf.rst b/Misc/NEWS.d/next/Library/2024-04-05-15-51-01.gh-issue-117566.54nABf.rst new file mode 100644 index 0000000..56c2fb0 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2024-04-05-15-51-01.gh-issue-117566.54nABf.rst @@ -0,0 +1,3 @@ +:meth:`ipaddress.IPv6Address.is_loopback` will now return ``True`` for +IPv4-mapped loopback addresses, i.e. addresses in the +``::ffff:127.0.0.0/104`` address space. |