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[3.12] gh-129994: update docs when using dualstack_ipv6 in socket.create_server (GH-129996) (#131891)

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gh-129994: update docs when using `dualstack_ipv6` in `socket.create_server` (GH-129996)
(cherry picked from commit 044a1e13d5)

Co-authored-by: Alexander Ershov <150328014+AEErshov@users.noreply.github.com>
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Miss Islington (bot) 2025-03-30 10:28:26 +02:00 • committed by GitHub
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8
Doc/library/socket.rst
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@ -833,10 +833,10 @@ The following functions all create :ref:`socket objects <socket-objects>`.
, a default reasonable value is chosen.
*reuse_port* dictates whether to set the :data:`SO_REUSEPORT` socket option.
If *dualstack_ipv6* is true and the platform supports it the socket will
be able to accept both IPv4 and IPv6 connections, else it will raise
:exc:`ValueError`. Most POSIX platforms and Windows are supposed to support
this functionality.
If *dualstack_ipv6* is true, *family* is :data:`AF_INET6` and the platform
supports it the socket will be able to accept both IPv4 and IPv6 connections,
else it will raise :exc:`ValueError`. Most POSIX platforms and Windows are
supposed to support this functionality.
When this functionality is enabled the address returned by
:meth:`socket.getpeername` when an IPv4 connection occurs will be an IPv6
address represented as an IPv4-mapped IPv6 address.