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[3.15] gh-154291: Fix socket.has_dualstack_ipv6() on DragonFly BSD (GH-154292) (GH...
authorMiss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Mon, 20 Jul 2026 20:26:18 +0000 (22:26 +0200)
committerGitHub <noreply@github.com>
Mon, 20 Jul 2026 20:26:18 +0000 (20:26 +0000)
commit4294605c3da0d8a44412eb2ff1ad03530de13779
tree0ea24b165205b02248c2c8a200526830804751f6tree | snapshot
parent387f7cd81d285ca9ed9a95b2376a2290a3241f20commit | diff
[3.15] gh-154291: Fix socket.has_dualstack_ipv6() on DragonFly BSD (GH-154292) (GH-154299)

On DragonFly BSD setsockopt(IPPROTO_IPV6, IPV6_V6ONLY, 0) succeeds without
actually clearing the flag, so has_dualstack_ipv6() wrongly returned True.
Verify with getsockopt() that IPV6_V6ONLY was cleared.
(cherry picked from commit c7bbf040e721781be8f11a3b0716220835d4de2f)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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