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[3.13] gh-124217, ipaddress: Add RFC 9637 reserved IPv6 block `3fff::/20` (GH-124240) by miss-islington · Pull Request #124282 · python/cpython · GitHub

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[3.13] gh-124217, ipaddress: Add RFC 9637 reserved IPv6 block 3fff::/20 (GH-124240) #124282

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Merged
vstinner merged 1 commit into from
Oct 7, 2024
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[3.13] gh-124217, ipaddress: Add RFC 9637 reserved IPv6 block 3fff::/20 (GH-124240) #124282

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2 changes: 2 additions & 0 deletions Lib/ipaddress.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2383,6 +2383,8 @@ class _IPv6Constants:
IPv6Network('2001:db8::/32'),
# IANA says N/A, let's consider it not globally reachable to be safe
IPv6Network('2002::/16'),
# RFC 9637: https://www.rfc-editor.org/rfc/rfc9637.html#section-6-2.2
IPv6Network('3fff::/20'),
IPv6Network('fc00::/7'),
IPv6Network('fe80::/10'),
]
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2 changes: 2 additions & 0 deletions Lib/test/test_ipaddress.py
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Expand Up @@ -2427,6 +2427,8 @@ def testReservedIpv6(self):
self.assertTrue(ipaddress.ip_address('2001:30::').is_global)
self.assertFalse(ipaddress.ip_address('2001:40::').is_global)
self.assertFalse(ipaddress.ip_address('2002::').is_global)
# gh-124217: conform with RFC 9637
self.assertFalse(ipaddress.ip_address('3fff::').is_global)

# some generic IETF reserved addresses
self.assertEqual(True, ipaddress.ip_address('100::').is_reserved)
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2024-09-19-20-15-00.gh-issue-124217.j0KlQB.rst
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@@ -0,0 +1 @@
Add RFC 9637 reserved IPv6 block ``3fff::/20`` in :mod:`ipaddress` module.
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