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bpo-33433 Fix private address checking for IPv4 mapped IPv6. (GH-26172)

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For IPv4 mapped IPv6 addresses, defer privacy check to the mapped IPv4 address. Solves bug where public mapped IPv4 addresses are considered private by the IPv6 check.

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Pete Wicken 2021-05-17 08:52:36 +01:00 • committed by GitHub
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Misc/NEWS.d/next/Library/2021-05-16-17-48-24.bpo-33433.MyzO71.rst Normal file
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For IPv4 mapped IPv6 addresses (:rfc:`4291` Section 2.5.5.2), the :mod:`ipaddress.IPv6Address.is_private` check is deferred to the mapped IPv4 address. This solves a bug where public mapped IPv4 addresses were considered private by the IPv6 check.